Description:
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Currently, there's no way to do a syntax check from within a script (unless we do something like `/usr/bin/php -l /path/to/script.php`) and there deffinately are use cases for such a feature.

Considering that the actual checking logic is already available, it shouldn't be hard at all to make a function alternative to it.

Here's what the function description would look like:

    bool php_syntax_check( string $target [, bool $raw_code = FALSE] )

$target is the script file path, unless $raw_code is set to TRUE. In the latter case - $target is raw php code, as it would be passed to eval().