Australiablog275

The Qt SQL module uses driver plugins to communicate with the different database APIs. Since Qt's SQL Module API is database-independent, all database-specific code is contained within these drivers. Several drivers are supplied with Qt, and other drivers can be added. The driver source code is supplied and can be used as a model for writing your own drivers.

1. Setup Mysql On Windows 10
2. Install Mysql 5.7 For Windows 10
3. Windows 10 Mysql Odbc Driver

The software that is installed is identical in each case, only the installation method is different. MySQL Installer (recommended): The general MySQL Installer application for Windows can install, upgrade, configure, and manage most MySQL products, including Connector/ODBC.

• Oracle via OCI, PostgreSQL, and MySQL through either ODBC or a native driver are well-tested on Windows and Linux. The completeness of the support for other systems depends on the availability and quality of client libraries. Note: To build a driver plugin you need to have the appropriate client library for your Database Management System (DBMS.
• MySQL works with most Windows Operating System, including Windows XP64 / Vista64 / Windows 7 64 / Windows 8 64 / Windows 10 64. Although there are many popular Developer Tools software, most people download and install the Open Source version. However, don’t forget to update the programs periodically.
• Supported Platforms: MySQL Database MySQL supports deployment in virtualized environments, subject to Oracle KM Note 249212.1. For further details, please contact the MySQL Sales Team. Important Platform Support Updates ».

Supported Databases

The table below lists the drivers included with Qt:

SQLite is the in-process database system with the best test coverage and support on all platforms. Oracle via OCI, PostgreSQL, and MySQL through either ODBC or a native driver are well-tested on Windows and Linux. The completeness of the support for other systems depends on the availability and quality of client libraries.

Note: To build a driver plugin you need to have the appropriate client library for your Database Management System (DBMS). This provides access to the API exposed by the DBMS, and is typically shipped with it. Most installation programs also allow you to install 'development libraries', and these are what you need. These libraries are responsible for the low-level communication with the DBMS.

Note: When using Qt under Open Source terms but with a proprietary database, verify the client library's license compatibility with the LGPL.

Building the Drivers

The Qt configure script tries to automatically detect the available client libraries on your machine. Run configure -help to see what drivers can be built. You should get an output similar to this:

The configure script cannot detect the necessary libraries and include files if they are not in the standard paths, so it may be necessary to specify these paths using the *_INCDIR=, *_LIBDIR=, or *_PREFIX= command-line options. For example, if your MySQL files are installed in /usr/local/mysql (or in C:mysql on Windows), then pass the following parameter to configure: MYSQL_PREFIX=/usr/local/mysql (or MYSQL_PREFIX=C:mysql for Windows). The particulars for each driver are explained below.

Due to the practicalities of dealing with external dependencies, only the SQLite3 plugin is shipped with binary builds of Qt. To be able to add additional drivers to the Qt installation without re-building all of Qt, it is possible to configure and build the qtbase/src/plugins/sqldrivers directory outside of a full Qt build directory. Note that it is not possible to configure each driver separately, only all of them at once. Drivers can be built separately, though. If the Qt build is configured with -prefix, it is necessary to install the plugins after building them, too. For example:

Driver Specifics

QMYSQL for MySQL 4 and higher

QMYSQL Stored Procedure Support

MySQL 5 introduces stored procedure support at the SQL level, but no API to control IN, OUT, and INOUT parameters. Therefore, parameters have to be set and read using SQL commands instead of QSqlQuery::bindValue().

Example stored procedure:

Source code to access the OUT values:

Note:@outval1 and @outval2 are variables local to the current connection and will not be affected by queries sent from another host or connection.

Embedded MySQL Server

The MySQL embedded server is a drop-in replacement for the normal client library. With the embedded MySQL server, a MySQL server is not required to use MySQL functionality.

To use the embedded MySQL server, simply link the Qt plugin to libmysqld instead of libmysqlclient. This can be done by adding MYSQL_LIBS=-lmysqld to the configure command line.

Please refer to the MySQL documentation, chapter 'libmysqld, the Embedded MySQL Server Library' for more information about the MySQL embedded server.

How to Build the QMYSQL Plugin on Unix and macOS

You need the MySQL header files, as well as the shared library libmysqlclient.so. Depending on your Linux distribution, you may need to install a package which is usually called 'mysql-devel'.

Tell qmake where to find the MySQL header files and shared libraries (here it is assumed that MySQL is installed in /usr/local) and run make:

How to Build the QMYSQL Plugin on Windows

You need to get the MySQL installation files. Run SETUP.EXE and choose 'Custom Install'. Install the 'Libs & Include Files' Module. Build the plugin as follows (here it is assumed that MySQL is installed in C:MySQL):

If you are not using a Microsoft compiler, replace nmake with mingw32-make in the line above.

QOCI for the Oracle Call Interface (OCI)

The Qt OCI plugin supports Oracle 9i, 10g and higher. After connecting to the Oracle server, the plugin will auto-detect the database version and enable features accordingly.

It's possible to connect to a Oracle database without a tnsnames.ora file. This requires that the database SID is passed to the driver as the database name, and that a hostname is given.

OCI User Authentication

The Qt OCI plugin supports authentication using external credentials (OCI_CRED_EXT). Usually, this means that the database server will use the user authentication provided by the operating system instead of its own authentication mechanism.

Leave the username and password empty when opening a connection with QSqlDatabase to use the external credentials authentication.

OCI BLOB/LOB Support

Binary Large Objects (BLOBs) can be read and written, but be aware that this process may require a lot of memory. You should use a forward only query to select LOB fields (see QSqlQuery::setForwardOnly()).

Inserting BLOBs should be done using either a prepared query where the BLOBs are bound to placeholders or QSqlTableModel, which uses a prepared query to do this internally.

How to Build the OCI Plugin on Unix and macOS

For Oracle 10g, all you need is the 'Instant Client Package - Basic' and 'Instant Client Package - SDK'. For Oracle prior to 10g, you require the standard Oracle client and the SDK packages.

Oracle library files required to build the driver:

• libclntsh.so (all versions)
• libwtc9.so (only Oracle 9)

Tell qmake where to find the Oracle header files and shared libraries and run make:

For Oracle version 9:

For Oracle version 10, we assume that you installed the RPM packages of the Instant Client Package SDK (you need to adjust the version number accordingly):

Note: If you are using the Oracle Instant Client package, you will need to set LD_LIBRARY_PATH when building the OCI SQL plugin, and when running an application that uses the OCI SQL plugin. You can avoid this requirement by setting RPATH, and listing all of the libraries to link to. Here is an example:

If you wish to build the OCI plugin manually with this method, the procedure looks like this:

How to Build the OCI Plugin on Windows

Choosing the option 'Programmer' in the Oracle Client Installer from the Oracle Client Installation CD is generally sufficient to build the plugin. For some versions of Oracle Client, you may also need to select the 'Call Interface (OCI)' option if it is available.

Build the plugin as follows (here it is assumed that Oracle Client is installed in C:oracle):

If you are not using a Microsoft compiler, replace nmake with mingw32-make in the line above.

When you run your application, you will also need to add the oci.dll path to your PATH environment variable:

QODBC for Open Database Connectivity (ODBC)

ODBC is a general interface that allows you to connect to multiple DBMSs using a common interface. The QODBC driver allows you to connect to an ODBC driver manager and access the available data sources. Note that you also need to install and configure ODBC drivers for the ODBC driver manager that is installed on your system. The QODBC plugin then allows you to use these data sources in your Qt applications.

Note: You should use the native driver, if it is available, instead of the ODBC driver. ODBC support can be used as a fallback for compliant databases if no native driver is available.

On Windows, an ODBC driver manager should be installed by default. For Unix systems, there are some implementations which must be installed first. Note that every end user of your application is required to have an ODBC driver manager installed, otherwise the QODBC plugin will not work.

When connecting to an ODBC datasource, you should pass the name of the ODBC datasource to the QSqlDatabase::setDatabaseName() function, rather than the actual database name.

The QODBC Plugin needs an ODBC compliant driver manager version 2.0 or later. Some ODBC drivers claim to be version-2.0-compliant, but do not offer all the necessary functionality. The QODBC plugin therefore checks whether the data source can be used after a connection has been established, and refuses to work if the check fails. If you do not like this behavior, you can remove the #define ODBC_CHECK_DRIVER line from the file qsql_odbc.cpp. Do this at your own risk!

By default, Qt instructs the ODBC driver to behave as an ODBC 2.x driver. However, for some driver-manager/ODBC 3.x-driver combinations (e.g., unixODBC/MaxDB ODBC), telling the ODBC driver to behave as a 2.x driver can cause the driver plugin to have unexpected behavior. To avoid this problem, instruct the ODBC driver to behave as a 3.x driver by setting the connect option'SQL_ATTR_ODBC_VERSION=SQL_OV_ODBC3' before you open your database connection. Note that this will affect multiple aspects of ODBC driver behavior, e.g., the SQLSTATEs. Before setting this connect option, consult your ODBC documentation about behavior differences you can expect.

When using the SAP HANA database, the connection has to be established using the option 'SCROLLABLERESULT=TRUE', as the HANA ODBC driver does not provide scrollable results by default, e.g.:

If you experience very slow access of the ODBC datasource, make sure that ODBC call tracing is turned off in the ODBC datasource manager.

Some drivers do not support scrollable cursors. In that case, only queries in forwardOnly mode can be used successfully.

ODBC Stored Procedure Support

With Microsoft SQL Server the result set returned by a stored procedure that uses the return statement, or returns multiple result sets, will be accessible only if you set the query's forward only mode to forward using QSqlQuery::setForwardOnly().

Note: The value returned by the stored procedure's return statement is discarded.

ODBC Unicode Support

The QODBC Plugin will use the Unicode API if UNICODE is defined. On Windows NT based systems, this is the default. Note that the ODBC driver and the DBMS must also support Unicode.

Some driver managers and drivers do not support UNICODE. To use the QODBC plugin with such drivers, it has to be compiled with Q_ODBC_VERSION_2 defined.

For the Oracle 9 ODBC driver (Windows), it is necessary to check 'SQL_WCHAR support' in the ODBC driver manager otherwise Oracle will convert all Unicode strings to local 8-bit.

How to Build the ODBC Plugin on Unix and macOS

It is recommended that you use unixODBC. You can find the latest version and ODBC drivers at http://www.unixodbc.org. You need the unixODBC header files and shared libraries.

Tell qmake where to find the unixODBC header files and shared libraries (here it is assumed that unixODBC is installed in /usr/local/unixODBC) and run make:

How to Build the ODBC Plugin on Windows

The ODBC header and include files should already be installed in the right directories. You just have to build the plugin as follows:

If you are not using a Microsoft compiler, replace nmake with mingw32-make in the line above.

QPSQL for PostgreSQL (Version 7.3 and Above)

The QPSQL driver supports version 7.3 and higher of the PostgreSQL server.

For more information about PostgreSQL visit http://www.postgresql.org.

QPSQL Unicode Support

The QPSQL driver automatically detects whether the PostgreSQL database you are connecting to supports Unicode or not. Unicode is automatically used if the server supports it. Note that the driver only supports the UTF-8 encoding. If your database uses any other encoding, the server must be compiled with Unicode conversion support.

Unicode support was introduced in PostgreSQL version 7.1 and it will only work if both the server and the client library have been compiled with multibyte support. More information about how to set up a multibyte enabled PostgreSQL server can be found in the PostgreSQL Administrator Guide, Chapter 5.

QPSQL BLOB Support

Binary Large Objects are supported through the BYTEA field type in PostgreSQL server versions >= 7.1.

QPSQL Forward-only query support

To use forward-only queries, you must build the QPSQL plugin with PostreSQL client library version 9.2 or later. If the plugin is built with an older version, then forward-only mode will not be available - calling QSqlQuery::setForwardOnly() with true will have no effect.

Warning: If you build the QPSQL plugin with PostgreSQL version 9.2 or later, then you must distribute your application with libpq version 9.2 or later. Otherwise, loading the QPSQL plugin will fail with the following message:

While navigating the results in forward-only mode, the handle of QSqlResult may change. Applications that use the low-level handle of SQL result must get a new handle after each call to any of QSqlResult fetch functions. Example:

While reading the results of a forward-only query with PostgreSQL, the database connection cannot be used to execute other queries. This is a limitation of libpq library. Example:

This problem will not occur if query1 and query2 use different database connections, or if we execute query2 after the while loop.

Note: Some methods of QSqlDatabase like tables(), primaryIndex() implicity execute SQL queries, so these also cannot be used while navigating the results of forward-only query.

Note: QPSQL will print the following warning if it detects a loss of query results:

How to Build the QPSQL Plugin on Unix and macOS

You need the PostgreSQL client library and headers installed.

To make qmake find the PostgreSQL header files and shared libraries, run qmake the following way (assuming that the PostgreSQL client is installed in /usr):

How to Build the QPSQL Plugin on Windows

Install the appropriate PostgreSQL developer libraries for your compiler. Assuming that PostgreSQL was installed in C:psql, build the plugin as follows:

Users of MinGW may wish to consult the following online document: PostgreSQL MinGW/Native Windows.

QTDS for Sybase Adaptive Server

Note: TDS is no longer used by MS Sql Server, and is superseded by ODBC. QTDS is obsolete from Qt 4.7.

It is not possible to set the port with QSqlDatabase::setPort() due to limitations in the Sybase client library. Refer to the Sybase documentation for information on how to set up a Sybase client configuration file to enable connections to databases on non-default ports.

How to Build the QTDS Plugin on Unix and macOS

Under Unix, two libraries are available which support the TDS protocol:

• FreeTDS, a free implementation of the TDS protocol (http://www.freetds.org).
• Sybase Open Client, available from https://support.sap.com.

Regardless of which library you use, the shared object file libsybdb.so is needed. Set the SYBASE environment variable to point to the directory where you installed the client library and execute qmake:

How to Build the QDTS Plugin on Windows

You can either use the DB-Library supplied by Microsoft or the Sybase Open Client (https://support.sap.com). Configure will try to find NTWDBLIB.LIB to build the plugin:

By default, the Microsoft library is used on Windows. If you want to force the use of the Sybase Open Client, you must define Q_USE_SYBASE in %QTDIR%qtbasesrcpluginssqldriverstdsqsql_tds.cpp.

If you are not using a Microsoft compiler, replace nmake with mingw32-make in the line above.

QDB2 for IBM DB2 (Version 7.1 and Above)

The Qt DB2 plugin makes it possible to access IBM DB2 databases. It has been tested with IBM DB2 v7.1 and 7.2. You must install the IBM DB2 development client library, which contains the header and library files necessary for compiling the QDB2 plugin.

The QDB2 driver supports prepared queries, reading/writing of Unicode strings and reading/writing of BLOBs.

We suggest using a forward-only query when calling stored procedures in DB2 (see QSqlQuery::setForwardOnly()).

How to Build the QDB2 Plugin on Unix and macOS

How to Build the QDB2 Plugin on Windows

The DB2 header and include files should already be installed in the right directories. You just have to build the plugin as follows:

If you are not using a Microsoft compiler, replace nmake with mingw32-make in the line above.

QSQLITE2 for SQLite Version 2

The Qt SQLite 2 plugin is offered for compatibility. Whenever possible, use the version 3 plugin instead. The build instructions for version 3 apply to version 2 as well.

QSQLITE for SQLite (Version 3 and Above)

The Qt SQLite plugin makes it possible to access SQLite databases. SQLite is an in-process database, which means that it is not necessary to have a database server. SQLite operates on a single file, which must be set as the database name when opening a connection. If the file does not exist, SQLite will try to create it. SQLite also supports in-memory and temporary databases. Simply pass respectively ':memory:' or an empty string as the database name.

SQLite has some restrictions regarding multiple users and multiple transactions. If you try to read/write on a resource from different transactions, your application might freeze until one transaction commits or rolls back. The Qt SQLite driver will retry to write to a locked resource until it runs into a timeout (see QSQLITE_BUSY_TIMEOUT at QSqlDatabase::setConnectOptions()).

In SQLite any column, with the exception of an INTEGER PRIMARY KEY column, may be used to store any type of value. For instance, a column declared as INTEGER may contain an integer value in one row and a text value in the next. This is due to SQLite associating the type of a value with the value itself rather than with the column it is stored in. A consequence of this is that the type returned by QSqlField::type() only indicates the field's recommended type. No assumption of the actual type should be made from this and the type of the individual values should be checked.

The driver is locked for updates while a select is executed. This may cause problems when using QSqlTableModel because Qt's item views fetch data as needed (with QSqlQuery::fetchMore() in the case of QSqlTableModel).

You can find information about SQLite on http://www.sqlite.org.

How to Build the QSQLITE Plugin

SQLite version 3 is included as a third-party library within Qt. It can be built by passing the -qt-sqlite parameter to the configure script.

If you do not want to use the SQLite library included with Qt, you can pass -system-sqlite to the configure script to use the SQLite libraries of the operating system. This is recommended whenever possible, as it reduces the installation size and removes one component for which you need to track security advisories.

On Unix and macOS (replace $SQLITE with the directory where SQLite resides):

On Windows:

Enable REGEXP operator

SQLite comes with a REGEXP operation. However the needed implementation must be provided by the user. For convenience a default implementation can be enabled by setting the connect optionQSQLITE_ENABLE_REGEXP before the database connection is opened. Then a SQL statement like 'column REGEXP 'pattern' basically expands to the Qt code

For better performance the regular expressions are cached internally. By default the cache size is 25, but it can be changed through the option's value. For example passing 'QSQLITE_ENABLE_REGEXP=10' reduces the cache size to 10.

QSQLITE File Format Compatibility

SQLite minor releases sometimes break file format forward compatibility. For example, SQLite 3.3 can read database files created with SQLite 3.2, but databases created with SQLite 3.3 cannot be read by SQLite 3.2. Please refer to the SQLite documentation and change logs for information about file format compatibility between versions.

Qt minor releases usually follow the SQLite minor releases, while Qt patch releases follow SQLite patch releases. Patch releases are therefore both backward and forward compatible.

To force SQLite to use a specific file format, it is necessary to build and ship your own database plugin with your own SQLite library as illustrated above. Some versions of SQLite can be forced to write a specific file format by setting the SQLITE_DEFAULT_FILE_FORMAT define when building SQLite.

QIBASE for Borland InterBase

The Qt InterBase plugin makes it possible to access the InterBase and Firebird databases. InterBase can either be used as a client/server or without a server in which case it operates on local files. The database file must exist before a connection can be established. Firebird must be used with a server configuration.

Note that InterBase requires you to specify the full path to the database file, no matter whether it is stored locally or on another server.

You need the InterBase/Firebird development headers and libraries to build this plugin.

Due to license incompatibilities with the GPL, users of the Qt Open Source Edition are not allowed to link this plugin to the commercial editions of InterBase. Please use Firebird or the free edition of InterBase.

QIBASE Unicode Support and Text Encoding

By default the driver connects to the database using UNICODE_FSS. This can be overridden by setting the ISC_DPB_LC_CTYPE parameter with QSqlDatabase::setConnectOptions() before opening the connection.

If Qt does not support the given text encoding the driver will issue a warning message and connect to the database using UNICODE_FSS.

Note that if the text encoding set when connecting to the database is not the same as in the database, problems with transliteration might arise.

QIBASE Stored procedures

InterBase/Firebird return OUT values as result set, so when calling stored procedure, only IN values need to be bound via QSqlQuery::bindValue(). The RETURN/OUT values can be retrieved via QSqlQuery::value(). Example:

How to Build the QIBASE Plugin on Unix and macOS

The following assumes InterBase or Firebird is installed in /opt/interbase:

If you are using InterBase:

If you are using Firebird, the Firebird library has to be set explicitly:

How to Build the QIBASE Plugin on Windows

The following assumes InterBase or Firebird is installed in C:interbase:

If you are using InterBase:

If you are using Firebird, the Firebird library has to be set explicitly:

If you are not using a Microsoft compiler, replace nmake with mingw32-make in the line above.

Note that C:interbasebin must be in the PATH.

Troubleshooting

You should always use client libraries that have been compiled with the same compiler as you are using for your project. If you cannot get a source distibution to compile the client libraries yourself, you must make sure that the pre-compiled library is compatible with your compiler, otherwise you will get a lot of 'undefined symbols' errors. Some compilers have tools to convert libraries, e.g. Borland ships the tool COFF2OMF.EXE to convert libraries that have been generated with Microsoft Visual C++.

If the compilation of a plugin succeeds but it cannot be loaded, make sure that the following requirements are met:

• Ensure that the plugin is in the correct directory. You can use QApplication::libraryPaths() to determine where Qt looks for plugins.
• Ensure that the client libraries of the DBMS are available on the system. On Unix, run the command ldd and pass the name of the plugin as parameter, for example ldd libqsqlmysql.so. You will get a warning if any of the client libraries could not be found. On Windows, you can use Visual Studio's dependency walker. With Qt Creator, you can update the PATH environment variable in the Run section of the Project panel to include the path to the folder containing the client libraries.
• Compile Qt with QT_DEBUG_COMPONENT defined to get very verbose debug output when loading plugins.

Make sure you have followed the guide to Deploying Plugins.

How to Write Your Own Database Driver

QSqlDatabase is responsible for loading and managing database driver plugins. When a database is added (see QSqlDatabase::addDatabase()), the appropriate driver plugin is loaded (using QSqlDriverPlugin). QSqlDatabase relies on the driver plugin to provide interfaces for QSqlDriver and QSqlResult.

QSqlDriver is an abstract base class which defines the functionality of a SQL database driver. This includes functions such as QSqlDriver::open() and QSqlDriver::close(). QSqlDriver is responsible for connecting to a database, establish the proper environment, etc. In addition, QSqlDriver can create QSqlQuery objects appropriate for the particular database API. QSqlDatabase forwards many of its function calls directly to QSqlDriver which provides the concrete implementation.

QSqlResult is an abstract base class which defines the functionality of a SQL database query. This includes statements such as SELECT, UPDATE, and ALTERTABLE. QSqlResult contains functions such as QSqlResult::next() and QSqlResult::value(). QSqlResult is responsible for sending queries to the database, returning result data, etc. QSqlQuery forwards many of its function calls directly to QSqlResult which provides the concrete implementation.

QSqlDriver and QSqlResult are closely connected. When implementing a Qt SQL driver, both of these classes must to be subclassed and the abstract virtual methods in each class must be implemented.

To implement a Qt SQL driver as a plugin (so that it is recognized and loaded by the Qt library at runtime), the driver must use the Q_PLUGIN_METADATA() macro. Read How to Create Qt Plugins for more information on this. You can also check out how this is done in the SQL plugins that are provided with Qt in QTDIR/qtbase/src/plugins/sqldrivers.

The following code can be used as a skeleton for a SQL driver:

© 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.

Php_pdo_mysql.dll Explanationlink

Php_pdo_mysql.dll, is a dynamic link library developed by The PHP Group.

The size of this dynamic link library is 0.02 MB and its download links are healthy. It has been downloaded 2603 times already and it has received 1.0 out of 5 stars.

Table of Contents

• How to Install Php_pdo_mysql.dll? How to Fix Php_pdo_mysql.dll Errors?
  • Method 5: Fixing the Php_pdo_mysql.dll Errors by Manually Updating Windows

Operating Systems Compatible with the Php_pdo_mysql.dll Librarylink

Other Versions of the Php_pdo_mysql.dll Librarylink

The latest version of the Php_pdo_mysql.dll library is 5.4.3.0 version. Before this, there were 1 versions released. All versions released up till now are listed below from newest to oldest

1. 5.4.3.0 - 32 Bit (x86)Download directly this version now
2. 5.1.2.2 - 32 Bit (x86)Download directly this version now

Steps to Download the Php_pdo_mysql.dll Librarylink

1. First, click the 'Download' button with the green background (The button marked in the picture).
2. The downloading page will open after clicking the Download button. After the page opens, in order to download the Php_pdo_mysql.dll library the best server will be found and the download process will begin within a few seconds. In the meantime, you shouldn't close the page.

How to Install Php_pdo_mysql.dll? How to Fix Php_pdo_mysql.dll Errors?link

ATTENTION! Before beginning the installation of the Php_pdo_mysql.dll library, you must download the library. If you don't know how to download the library or if you are having a problem while downloading, you can look at our download guide a few lines above.

Method 1: Fixing the DLL Error by Copying the Php_pdo_mysql.dll Library to the Windows System Directorylink

1. The file you downloaded is a compressed file with the extension '.zip'. This file cannot be installed. To be able to install it, first you need to extract the dynamic link library from within it. So, first double-click the file with the '.zip' extension and open the file.
2. You will see the library named 'Php_pdo_mysql.dll' in the window that opens. This is the library you need to install. Click on the dynamic link library with the left button of the mouse. By doing this, you select the library.
3. Click on the 'Extract To' button, which is marked in the picture. In order to do this, you will need the Winrar program. If you don't have the program, it can be found doing a quick search on the Internet and you can download it (The Winrar program is free).
4. After clicking the 'Extract to' button, a window where you can choose the location you want will open. Choose the 'Desktop' location in this window and extract the dynamic link library to the desktop by clicking the 'Ok' button.
5. Copy the 'Php_pdo_mysql.dll' library you extracted and paste it into the 'C:WindowsSystem32' directory.
6. If you are using a 64 Bit operating system, copy the 'Php_pdo_mysql.dll' library and paste it into the 'C:WindowssysWOW64' as well.

   NOTE! On Windows operating systems with 64 Bit architecture, the dynamic link library must be in both the 'sysWOW64' directory as well as the 'System32' directory. In other words, you must copy the 'Php_pdo_mysql.dll' library into both directories.

7. In order to run the Command Line as an administrator, complete the following steps.

   NOTE! In this explanation, we ran the Command Line on Windows 10. If you are using one of the Windows 8.1, Windows 8, Windows 7, Windows Vista or Windows XP operating systems, you can use the same methods to run the Command Line as an administrator. Even though the pictures are taken from Windows 10, the processes are similar.

   1. First, open the Start Menu and before clicking anywhere, type 'cmd' but do not press Enter.
   2. When you see the 'Command Line' option among the search results, hit the 'CTRL' + 'SHIFT' + 'ENTER' keys on your keyboard.
   3. A window will pop up asking, 'Do you want to run this process?'. Confirm it by clicking to 'Yes' button.
8. Paste the command below into the Command Line window that opens up and press Enter key. This command will delete the problematic registry of the Php_pdo_mysql.dll library (Nothing will happen to the library we pasted in the System32 directory, it just deletes the registry from the Windows Registry Editor. The library we pasted in the System32 directory will not be damaged).

   %windir%System32regsvr32.exe /u Php_pdo_mysql.dll

9. If you have a 64 Bit operating system, after running the command above, you must run the command below. This command will clean the Php_pdo_mysql.dll library's damaged registry in 64 Bit as well (The cleaning process will be in the registries in the Registry Editor< only. In other words, the dll file you paste into the SysWoW64 folder will stay as it).

   %windir%SysWoW64regsvr32.exe /u Php_pdo_mysql.dll

10. We need to make a clean registry for the dll library's registry that we deleted from Regedit (Windows Registry Editor). In order to accomplish this, copy and paste the command below into the Command Line and press Enter key.

    %windir%System32regsvr32.exe /i Php_pdo_mysql.dll

11. Windows 64 Bit users must run the command below after running the previous command. With this command, we will create a clean and good registry for the Php_pdo_mysql.dll library we deleted.

    %windir%SysWoW64regsvr32.exe /i Php_pdo_mysql.dll

12. You may see certain error messages when running the commands from the command line. These errors will not prevent the installation of the Php_pdo_mysql.dll library. In other words, the installation will finish, but it may give some errors because of certain incompatibilities. After restarting your computer, to see if the installation was successful or not, try running the program that was giving the dll error again. If you continue to get the errors when running the program after the installation, you can try the 2nd Method as an alternative.

Method 2: Copying The Php_pdo_mysql.dll Library Into The Program Installation Directorylink

1. First, you need to find the installation directory for the program you are receiving the 'Php_pdo_mysql.dll not found', 'Php_pdo_mysql.dll is missing' or other similar dll errors. In order to do this, right-click on the shortcut for the program and click the Properties option from the options that come up.
2. Open the program's installation directory by clicking on the Open File Location button in the Properties window that comes up.
3. Copy the Php_pdo_mysql.dll library into the directory we opened.
4. The installation is complete. Run the program that is giving you the error. If the error is continuing, you may benefit from trying the 3rd Method as an alternative.

Method 3: Doing a Clean Reinstall of the Program That Is Giving the Php_pdo_mysql.dll Errorlink

1. Push the 'Windows' + 'R' keys at the same time to open the Run window. Type the command below into the Run window that opens up and hit Enter. This process will open the 'Programs and Features' window.

   appwiz.cpl

2. The Programs and Features screen will come up. You can see all the programs installed on your computer in the list on this screen. Find the program giving you the dll error in the list and right-click it. Click the 'Uninstall' item in the right-click menu that appears and begin the uninstall process.
3. A window will open up asking whether to confirm or deny the uninstall process for the program. Confirm the process and wait for the uninstall process to finish. Restart your computer after the program has been uninstalled from your computer.
4. 4. After restarting your computer, reinstall the program that was giving you the error.
5. This process may help the dll problem you are experiencing. If you are continuing to get the same dll error, the problem is most likely with Windows. In order to fix dll problems relating to Windows, complete the 4th Method and 5th Method.

Method 4: Fixing the Php_pdo_mysql.dll Error using the Windows System File Checker (sfc /scannow)link

1. In order to run the Command Line as an administrator, complete the following steps.

   NOTE! In this explanation, we ran the Command Line on Windows 10. If you are using one of the Windows 8.1, Windows 8, Windows 7, Windows Vista or Windows XP operating systems, you can use the same methods to run the Command Line as an administrator. Even though the pictures are taken from Windows 10, the processes are similar.

   1. First, open the Start Menu and before clicking anywhere, type 'cmd' but do not press Enter.
   2. When you see the 'Command Line' option among the search results, hit the 'CTRL' + 'SHIFT' + 'ENTER' keys on your keyboard.
   3. A window will pop up asking, 'Do you want to run this process?'. Confirm it by clicking to 'Yes' button.
2. After typing the command below into the Command Line, push Enter.

   sfc /scannow

3. Depending on your computer's performance and the amount of errors on your system, this process can take some time. You can see the progress on the Command Line. Wait for this process to end. After the scan and repair processes are finished, try running the program giving you errors again.

Method 5: Fixing the Php_pdo_mysql.dll Errors by Manually Updating Windowslink

Most of the time, programs have been programmed to use the most recent dynamic link libraries. If your operating system is not updated, these files cannot be provided and dll errors appear. So, we will try to fix the dll errors by updating the operating system.

Since the methods to update Windows versions are different from each other, we found it appropriate to prepare a separate article for each Windows version. You can get our update article that relates to your operating system version by using the links below.

Windows Update Guideslink

The Most Seen Php_pdo_mysql.dll Errorslink

It's possible that during the programs' installation or while using them, the Php_pdo_mysql.dll library was damaged or deleted. You can generally see error messages listed below or similar ones in situations like this.

Setup Mysql On Windows 10

These errors we see are not unsolvable. If you've also received an error message like this, first you must download the Php_pdo_mysql.dll library by clicking the 'Download' button in this page's top section. After downloading the library, you should install the library and complete the solution methods explained a little bit above on this page and mount it in Windows. If you do not have a hardware issue, one of the methods explained in this article will fix your issue.

1. 'Php_pdo_mysql.dll not found.' error
2. 'The file Php_pdo_mysql.dll is missing.' error
3. 'Php_pdo_mysql.dll access violation.' error
4. 'Cannot register Php_pdo_mysql.dll.' error
5. 'Cannot find Php_pdo_mysql.dll.' error
6. 'This application failed to start because Php_pdo_mysql.dll was not found. Re-installing the application may fix this problem.' error

Dynamic Link Libraries Similar to the Php_pdo_mysql.dll Librarylink

Install Mysql 5.7 For Windows 10

Incoming Feedback for the Php_pdo_mysql.dll Librarylink

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The Location on our Site of the Php_pdo_mysql.dll Librarylink

Windows 10 Mysql Odbc Driver

• The PHP Group
  • The PHP Group + Windows 10
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  • The PHP Group + Windows XP
• Windows 10
• Windows 8.1
• Windows 8
• Windows 7
• Windows Vista
• Windows XP