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<?php namespace { function callable_equals(){ $strict = true; $callables = func_get_args(); if(is_bool($callables[count($callables) - 1])){ $strict = $callables[count($callables) - 1]; $callables = array_splice($callables, 0, -1); } $normalizeCallable = function(callable $callable){ if(is_string($callable)){ $callable = strtolower($callable); $pieces = explode("::", $callable); if(count($pieces) == 2){ return [$pieces[0], $pieces[1]]; } return $callable; } if(is_string($callable[0])){ $callable[0] = strtolower($callable[0]); } $callable[1] = strtolower($callable[1]); return $callable; }; if(count($callables) < 2){ trigger_error("callable_equals() requires at least 2 callables for comparison.", E_USER_WARNING); return null; } foreach($callables as $i => $callable){ if(!is_callable($callable)){ trigger_error("Argument " . ($i + 1) . " is not a callable.", E_USER_WARNING); return null; }else{ $callables[$i] = $normalizeCallable($callable); } } $callable = array_shift($callables); while($callables){ if($strict ? $callable !== $callables[0] : $callable != $callables[0]) return false; $callable = array_shift($callables); } return true; } } namespace A\b\C\d { class Foo{static function bar(){}} } namespace { class Foo{static function bar(){}} var_dump(callable_equals( ['Foo', 'bar'], 'foo::BAR' )); var_dump(callable_equals( ['A\\b\\C\\d\\Foo', 'bAr'], 'a\\B\\c\\D\\FoO::bar', ['A\\b\\c\\d\\foo', 'BAR'] )); var_dump(callable_equals( [new ArrayObject, 'append'], [new ArrayObject, 'append'] )); }