Question

How to check a variable to see if it can be called as a function in PHP

Answer 1

// bool is_callable(mixed $var [, bool $syntax_only = false 
//                  [, string &$callable_name ]] )

function f() 
{
    echo "f()";
}

$function_name = 'f';

echo "<pre>";
var_dump(is_callable($function_name, false, $callable_name));
echo "</pre>";

echo $callable_name


/*
run: 

bool(true)

f 

*/

 

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