I have some PHP scripts that run every minute via CRON. I don't want to receive emails every time they run correctly but I do want to receive an email if they throw an error (e.g. if they use too much memory).
To run the CRON:
This should send an email only when the result of stderr is not null, i.e. when there is a standard error.
However, PHP errors don't create a stderr, instead they are included in the stdout so no email is sent.
I have tried setting display_errors to stderr as shown in this question but it's a different use case as the scripts are not run by CRON. I have tried the following which have not worked:
including this in the script itself doesn't work because a fatal errors mean the script doesn't run:
ini_set ('display_errors', 'stderr');
including this in an .htaccess file (note PHP FPM is used) didn't work - I'm not sure why:
php_flag display_errors stderr
Changing the php.ini file is not an option because I don't want the change to affect the whole site, just a few files.
So my question is - how can the PHP errors be sent to stderr so that I can receive them via email?
The php executable takes command line options - you can either specify which php.ini it should use, or set specific config options via the -d parameter.
https://www.php.net/manual/en/features.commandline.options.php