PHP cannot use MySQL solution under Linux

PHP cannot use MySQL under Linux
Fatal error:call to undefined function mysql_connect () in/var/www/html/mysql.php on line 7

To report such a mistake

The EXTENSION=PHP_MYSQL.DL in the php.ini also opened up.
------Solution--------------------
Extension=php_mysql.dll
??
DLL is a linked file under Windows. Linux should be the so file.
So, you're in the wrong PHP package, right?
------Solution--------------------
1. Execute the Phpinfo () function to see if MySQL exists.
The extension to open MySQL under 2.linux is extension=mysql.so
Under Window is Extension=mysql.dll, please make a distinction.

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