3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo1($string, $with) { if (!$bytes = strlen($with)) { return true; } // Warning check, see http://php.net/manual/en/function.substr-compare.php#refsect1-function.substr-compare-returnvalues if (strlen($string) < $bytes) { return false; } return substr_compare($string, $with, -$bytes); } function foo2($string, $with) { if (!$bytes = strlen($with)) { return true; } // Warning check, see http://php.net/manual/en/function.substr-compare.php#refsect1-function.substr-compare-returnvalues if (strlen($string) < $bytes) { return false; } return substr_compare($string, $with, -$bytes, $bytes); } var_dump(foo1('a', 'a')); var_dump(foo2('a', 'a')); var_dump(foo1('', '')); var_dump(foo2('', '')); var_dump(foo1('a', '')); var_dump(foo2('a', '')); var_dump(foo1('', 'a')); var_dump(foo2('', 'a'));
based on 5AOVp
Output for 5.1.0 - 5.1.2, 5.1.5 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
int(0) int(0) bool(true) bool(true) bool(true) bool(true) bool(false) bool(false)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.3 - 5.1.4
int(0) Warning: substr_compare(): The start position cannot exceed initial string length in /in/ktTvQ on line 24 bool(false) bool(true) bool(true) bool(true) bool(true) bool(false) bool(false)
Output for 5.0.0 - 5.0.5
int(-97) int(-97) bool(true) bool(true) bool(true) bool(true) bool(false) bool(false)
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: substr_compare() in /in/ktTvQ on line 12
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: substr_compare() in /in/ktTvQ on line 12
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: substr_compare() in /in/ktTvQ on line 12