Test if set_time_limit exists

[V-E-O]

…abled functions

Closes #4982

Changes proposed in this pull request:
-@set_time_limit to function_exists then set_time_limit

How to test the feature manually:
1.purge and optimize db
2.refresh and actualize feeds

Pull request checklist:

• clear commit messages
• code manually tested
• unit tests written (optional if too hard)
• documentation updated (documentation not affected)

Additional information can be found in the documentation.

[ColonelMoutarde]

Suggested change

	@set_time_limit(300);
	$isTimeLimited = set_time_limit(300);
	if ($isTimeLimited === false) {
	continue;
	}

[ColonelMoutarde]

You can add the logic in function

[V-E-O]

@ColonelMoutarde After PHP8, with function set_time_limit disabled, set_time_limit (or even decorated with @) will cause fatal termination of script.

Prior to PHP 8.0.0, it was possible for the @ operator to disable critical errors that will terminate script execution. For example, prepending @ to a call of a function which did not exist, by being unavailable or mistyped, would cause the script to terminate with no indication as to why.

from https://www.php.net/manual/en/language.operators.errorcontrol.php

[ColonelMoutarde]

Hi, https://www.php.net/manual/en/function.set-time-limit.php set_time_limit is available for all php versions from 4 to 8.
The @ is not necessary, especially as you're checking that the function is present just beforehand. ;)

[Alkarex]

set_time_limit is available for all php versions from 4 to 8.

Partially wrong: any function can be disabled, and we have several examples of providers doing so for that specific function

The @ is not necessary

Wrong: there might be a warning with PHP < 8 (the function would exist, but would be disabled). See https://php.watch/versions/8.0/disable_functions-redeclare