Symptoms
An error like this one appears in Domains > example.com > Logs, or on the website
Note: <function_name> is a placeholder and will be different in the actual error
Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined function <function_name>() in /var/www/vhosts/example.com/httpdocs/test.php:3nStack trace:n#0 {main}n thrown in /var/www/vhosts/example.com/httpdocs/test.php on line 3'
Cause
The PHP function from the error is disabled in php.ini
Resolution
Warning: These steps don't work with PHP-FPM (global settings override them); they only apply to FastCGI.
Enable the disabled functions in the PHP configuration.
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Log in to Plesk
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Go to Domains > example.com > PHP Settings
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Remove the desired function from disable_functions
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Press OK
If there's no section called disable_functions, add disable_functions="" to Additional directives instead.
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Log in to Plesk
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Identify the affected PHP handler in Domains > example.com > PHP
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Go to Tools & Settings > PHP Settings > Affected PHP version > php.ini
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Find
disable_functionsand remove the function from the error -
Press OK to save the changes
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Connect to the server over SSH
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Identify the affected PHP handler with this command
Note: Replace
example.comwith the website from the error# plesk db "SELECT d.name,h.php_handler_id FROM domains d JOIN hosting h on h.dom_id=d.id WHERE name='example.com'"
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Edit the handler's
php.iniNote: Replace X.X with the version from Step 2
# vi /opt/plesk/php/X.X/etc/php.ini
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Find the line with
disable_functionsand delete the function from the error -
Restart the PHP service:
# service plesk-phpXX-fpm restart