(PHP 5 >= 5.2.0, PHP 7)
ReflectionFunctionAbstract::returnsReference — Checks if returns reference
public ReflectionFunctionAbstract::returnsReference ( ) : bool
Checks whether the function returns a reference.
This function is currently not documented; only its argument list is available.
This function has no parameters.
true if it returns a reference, otherwise false
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https://www.php.net/manual/en/reflectionfunctionabstract.returnsreference.php