Online PHP editor | output for 5g4aU

@ 2015-04-26T00:33:12Z

<?php
namespace
{
    function callable_equals(){

        $strict = false;
        $callables = func_get_args();

        if(is_bool($args[count($callables) - 1])){
            $strict = $args[count($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($callables){
            if($callable !== $callables[0])
                return false;
        }
        return true;
    }
    
    class Foo{static function bar(){}}
}

namespace A\b\C\d
{
    class Foo{static function bar(){}}
}

namespace
{
    var_dump(callable_equals(
        ['Foo', 'bar'],
        'foo::BAR'
    ));
    
    var_dump(callable_equals(
        ['A\\b\\C\\d\\Foo', 'bAr'],
        'a\\B\\c\\D\\FoO::bar'
    ));
}

Output for 8.3.0 - 8.3.4, 8.3.6: Warning: Undefined variable $args in /in/5g4aU on line 9 Warning: Trying to access array offset on null in /in/5g4aU on line 9
Process exited with code 137.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined variable $args in /in/5g4aU on line 9 Warning: Trying to access array offset on null in /in/5g4aU on line 9
Process exited with code 137.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18: Warning: Undefined variable $args in /in/5g4aU on line 9 Warning: Trying to access array offset on value of type null in /in/5g4aU on line 9
Process exited with code 137.
Output for 7.4.0 - 7.4.33: Notice: Undefined variable: args in /in/5g4aU on line 9 Notice: Trying to access array offset on value of type null in /in/5g4aU on line 9
Process exited with code 137.
Output for 7.3.32 - 7.3.33: Process exited with code 137.
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31: Notice: Undefined variable: args in /in/5g4aU on line 9
Process exited with code 137.

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