The solution to the problem that php.ini does not have pdo: first find and open the "php.ini" file; then add the configuration content as "extension=php_pdo.dll extension=php_pdo_mysql.dll"; finally restart apache.
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PHP opens PDO_MySQL extension
PHP in lower versions has PDO.Dll, but not PDO_MySQL.Dll, because it is not supported by default, so it is necessary to add it manually.
First, place the pdo_mysql.dll file in the ext directory under the PHP installation root directory
Note that if you configure other directories as extension directories in the php.ini file, then It needs to be placed under the configured directory. Which directory is your PHP extension directory? You need to look at extension_dir = "D:/PHP/php5/ext" in the php.ini file. Which directory is pointed after extension_dir in this line? , that is, which directory to look for PDO_MySQL.Dll.
Then search for "pdo" in the php.ini file. You can find the line ;extension=php_pdo.dll at once and see if there is a semicolon in front of this line. If there is, remove it.
Then look for extension=php_pdo_mysql.dll. If so, remove the preceding semicolon as well.
If not, add it manually. The final two lines of configuration content are as follows:
extension=php_pdo.dll extension=php_pdo_mysql.dll
Save the php.ini file, restart apache or IIS, and use the phpinfo function to observe whether there is the pdo extension. Under normal circumstances, you can view it normally.
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