Online PHP editor | output for 0peKX

@ 2013-11-21T11:02:14Z

<?php
  trait tSB_FormFieldObject {
  }
interface iSB_FormFieldObject {
}
class SB_FormFieldObject 
implements iSB_FormFieldObject {
    use tSB_FormFieldObject;
    public $Test2 = "aa";
}
function test($a=null) {
    echo "trait: " .($a instanceof tSB_FormFieldObject) . PHP_EOL;
    echo "interface: " .($a instanceof iSB_FormFieldObject) . PHP_EOL;
    echo "using: " .(is_using($a, "tSB_FormFieldffObject")) . PHP_EOL;
    echo "instanceof: " .(is_instance_of($a, "tSB_FormFieldffObject")) . PHP_EOL;
}
function is_using($class, $trait) {
    return in_array($trait, (new ReflectionClass($class))->getTraitNames());
}
  function is_instance_of($sub, $super) {
    $sub = (string)$sub;
    $super = is_object($super) ? get_class($super) : (string)$super;

    switch(true) {
        case $sub === $super; // well ... conformity
        case is_subclass_of($sub, $super):
        case in_array($super, class_implements($sub)):
            return true;
        default:
            return false;
    }
  }

$a = new SB_FormFieldObject();
test($a);
?>

Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: trait: interface: 1 using: Fatal error: Uncaught Error: Object of class SB_FormFieldObject could not be converted to string in /in/0peKX:21 Stack trace: #0 /in/0peKX(15): is_instance_of(Object(SB_FormFieldObject), 'tSB_FormFieldff...') #1 /in/0peKX(35): test(Object(SB_FormFieldObject)) #2 {main} thrown in /in/0peKX on line 21
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: trait: interface: 1 using: Recoverable fatal error: Object of class SB_FormFieldObject could not be converted to string in /in/0peKX on line 21
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20: trait: interface: 1 using: Catchable fatal error: Object of class SB_FormFieldObject could not be converted to string in /in/0peKX on line 21
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected T_STRING in /in/0peKX on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_STRING in /in/0peKX on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/0peKX on line 2
Process exited with code 255.

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