Fatal Error: Uncaught Error: Call to Undefined Function MySQL_Connect()

Fatal error: Uncaught Error: Call to undefined function mysql_connect()

mysql_* functions have been removed in PHP 7.

You probably have PHP 7 in XAMPP. You now have two alternatives: MySQLi and PDO.

Uncaught Error: Call to undefined function mysql_connect() - WordPress Setup

I found the solution, All you have to do is uncomment these lines in php.ini

extension=mysqli
extension=pdo_mysql

PHP Fatal error : Call to undefined function mysql_connect()

To correct the error, you've basically got two choices, either

1) modify the code to remove references to the mysql extension (and use mysqli or PDO instead), or

2) install an older version of PHP (before PHP7) which supports the mysql extension

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FOLLOWUP:

If what you claim is true... that mysql_ functions are working under PHP7, then the most likely explanation for that is that someone installed a third party module/library that exports mysql_ functions.

I believe there was some work done to build such a library, to provide backwards compatiblity. The library would interact with the database using using the newer PHP mysqli_ functions, and provide (mostly) compatible mysql_ functions for legacy applications.

But that's not part of PHP7. That would be a third party add on.

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