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PDO_MYSQL Configuration Options

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PDO_MYSQL Configuration OptionsNameDefaultChangeablepdo_mysql.default_socket"/tmp/mysql.sock"INI_SYSTEMpdo_mysql.debugNULLINI_SYSTEM Constants

Runtime Runtime

Name	Default	Changeable
pdo_mysql.default_socket	"/tmp/mysql.sock"	`INI_SYSTEM`
pdo_mysql.debug	NULL	`INI_SYSTEM`

Constants

Title

pdo_mysql.default_socketstring: Sets a Unix domain socket. This value can either be set at compile time if a domain socket is found at configure. This ini setting is Unix only.
pdo_mysql.debugbool: Enables debugging for PDO_MYSQL. This setting is only available when PDO_MYSQL is compiled against mysqlnd and in PDO debug mode.

Source: reference/pdo_mysql/ini.xml · from the official PHP manual (php/doc-en)