UNCAUGHT ERROR: CALL TO UNDEFINED FUNCTION MYSQL_ESCAPE_STRING()

  • Good Evening everyone,

    My actual configuration

    MySQL Version : 5.6
    Used Theme : Listify, but problem still persist with other themes
    PLugins : WP Job Manager and many others, but problem encountered with every plugins disabled too.
    Hosting provider : OVH
    Website URL : https://onmangeou.fr
    Problem Encountered :

    Since I tried to add a plugin to my WP, i first encountered an error 500, which became in few minutes this message:

    <b>Notice</b>: Constant WP_DEBUG already defined in <b>/home/onmageourm/www/wp-config.php</b> on line <b>86</b>

    <b>Fatal error</b>: Uncaught Error: Call to undefined function mysql_escape_string() in /home/onmageourm/www/wp-content/themes/listifys/functions.php:60 Stack trace: #0 /home/onmageourm/www/wp-settings.php(387): include() #1 /home/onmageourm/www/wp-config.php(95): require_once(‘/home/onmageour…’) #2 /home/onmageourm/www/wp-load.php(39): require_once(‘/home/onmageour…’) #3 /home/onmageourm/www/wp-admin/admin.php(31): require_once(‘/home/onmageour…’) #4 /home/onmageourm/www/wp-admin/themes.php(10): require_once(‘/home/onmageour…’) #5 {main} thrown in <b>/home/onmageourm/www/wp-content/themes/listifys/functions.php</b> on line <b>60</b>

    I tried to backup my database and reupload fresh WordPress fils apart from wp-content folder and wp-config.php, without success

    I really don’t understand this error, and I’m not really in the mood for a complete re-installation

    If any of you have an idea of how to solve it?

    Thanks

    Florent

Viewing 10 replies - 1 through 10 (of 10 total)
  • Moderator Steven Stern (sterndata)

    (@sterndata)

    Volunteer Forum Moderator

    Your server is running PHP version 7. You probably need an update to your theme.

    Thread Starter lo7

    (@lo7)

    Dear sterndata,
    Thanks for your fast answer.
    The fact is that the problem is the same with the default themes of WordPress, not only with listify. For example with thirtyfifteen I have this error:

    Notice: Constant WP_DEBUG already defined in /home/onmageourm/www/wp-config.php on line 86

    Fatal error: Uncaught Error: Call to undefined function mysql_escape_string() in /home/onmageourm/www/wp-content/themes/thirtyfifteen/functions.php:60 Stack trace: #0 /home/onmageourm/www/wp-settings.php(387): include() #1 /home/onmageourm/www/wp-config.php(95): require_once(‘/home/onmageour…’) #2 /home/onmageourm/www/wp-load.php(39): require_once(‘/home/onmageour…’) #3 /home/onmageourm/www/wp-admin/admin.php(31): require_once(‘/home/onmageour…’) #4 /home/onmageourm/www/wp-admin/themes.php(10): require_once(‘/home/onmageour…’) #5 {main} thrown in /home/onmageourm/www/wp-content/themes/thirtyfifteen/functions.php on line 60

    Moderator Steven Stern (sterndata)

    (@sterndata)

    Volunteer Forum Moderator

    thirtyfifteen is not a WordPress standard theme.

    Change the theme to twentysixteen.

    You mentioned OVH. Is this a VPS or shared hosting? If a VPS, what operating system are you using?

    Notice: Constant WP_DEBUG already defined in /home/onmageourm/www/wp-config.php on line 86

    You want two WP_DEBUG lines in your wp-config.php file. Remove one to make this notice go away.

    Thread Starter lo7

    (@lo7)

    The problem is the same with thirtysixteen:

    Fatal error: Uncaught Error: Call to undefined function mysql_escape_string() in /home/onmageourm/www/wp-content/themes/twentysixteen/functions.php:60 Stack trace: #0 /home/onmageourm/www/wp-settings.php(387): include() #1 /home/onmageourm/www/wp-config.php(95): require_once(‘/home/onmageour…’) #2 /home/onmageourm/www/wp-load.php(39): require_once(‘/home/onmageour…’) #3 /home/onmageourm/www/wp-admin/admin.php(31): require_once(‘/home/onmageour…’) #4 /home/onmageourm/www/wp-admin/themes.php(10): require_once(‘/home/onmageour…’) #5 {main} thrown in /home/onmageourm/www/wp-content/themes/twentysixteen/functions.php on line 60

    Furthermore, I realised I’m not longer able to proceed to updates from BO, there’s automatically an error that occur.

    Moderator Steven Stern (sterndata)

    (@sterndata)

    Volunteer Forum Moderator

    Please answer my question about your hosting.

    What do you mean by “updates from BO”?

    Thread Starter lo7

    (@lo7)

    OVH is a shared hosting. I opened a ticket and they sent me here :/

    By updates from BO, I mean that if I click on “update theme” for twentysixteen for example, I get an error.

    Moderator Steven Stern (sterndata)

    (@sterndata)

    Volunteer Forum Moderator

    The problem is that they need to install different PHP libraries for mysql with PHP7. This is not a wordpress problem. It’s server configuration issue. Please go back to OVH and ask them to either drop you back to PHP 5.6 or install the correct libraries for mysql with PHP 7.

    Thread Starter lo7

    (@lo7)

    Thanks sterndata,
    I contact OVH and I’ll post here if problem is solved.

    Thanks again for you help

    Easy to fix fellas !!

    Open the function.php and change mysql_escape_string() ( that is out of code) to mysqli_escape_string().

    Yes, stupid, but happens !!

    angelmaria

    (@angelmaria)

    Dear ericluque, thank you very much for sharing that answer. It help me fix that same problem that was driving me nuts for the last few days and my hosting provider was unable to answer. The WordPress community is awesome. Keep the good work!

Viewing 10 replies - 1 through 10 (of 10 total)
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