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<?php class string { private $holder = null; public function __consruct($x) { $this->holder = (string)$x; } public function __toString() { return $this->holder(); } public function __call($name, $args) { return call_user_func_array($name, array_merge([$this->holder], $args)); } } var_dump((new string('foo'))->strlen(), strlen(new string('bar')));
Output for 5.4.0 - 5.4.29
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'holder' not found or invalid function name in /in/9XP9t on line 19 Catchable fatal error: Method string::__toString() must return a string value in /in/9XP9t on line 23
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[', expecting ')' in /in/9XP9t on line 19
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/9XP9t on line 19
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/9XP9t on line 5
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
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/9XP9t on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/9XP9t on line 5
Process exited with code 255.
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