PHP equivalent of Python's __name__ == “__main__”?

Question

As per the title, is there PHP equivalent of __name__ == \"__main__\"?

Is there something that would work for both scripts executed through the command line

Answer 1

You probably want one of the "Magic Constants". Depending on what you are trying to do, __FILE__, __FUNCTION__ or __CLASS__ may give you the information you are after.

They are pretty self explanatory:

• __FILE__gives you the current file name
• __FUNCTION__ gives you the name of the current function
• __CLASS__ gives you the name of the current class.

Check the manual for more details

Answer 2

if ($argv && $argv[0] && realpath($argv[0]) === __FILE__) {
    // ...
}

works like a charm.

when you run php in command line, the name of php file will pass to program as $argv[0] and __FILE__ magic variable mean current file. So we check the running program is current file logically equals Python's __name__ == "__main__".

Answer 3

if (!count(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS)))
{
    // some usefull stuff
}

look at https://www.php.net/manual/en/function.debug-backtrace.php for more details on debug_backtrace function