我怎么知道fastcgi_finish_request（）是否可用？ [重复]

Question

This question already has an answer here:

• In PHP, how do I check if a function exists? 6 answers

Is there any approach like:

if (extension_loaded('apc') && ini_get('apc.enabled'))
{
echo "APC enabled!";
}

Cheers

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Answer 1

You can test with function_exists():

• function_exists — Return TRUE if the given function has been defined

Checks the list of defined functions, both built-in (internal) and user-defined, for function_name […] Returns TRUE if function_name exists and is a function, FALSE otherwise.

Example usage:

if (function_exists('fastcgi_finish_request')) {
    fastcgi_finish_request();
}