3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $assoc = array( "a" => 1, "b" => 0, 0 => 0 ); function is_assoc($array){ return !ctype_digit( implode('', ksort(array_keys($array))) ); } echo is_assoc($assoc); ?>
Output for 7.0.0 - 7.1.0
Notice: Only variables should be passed by reference in /in/feSgX on line 10 Warning: implode(): Invalid arguments passed in /in/feSgX on line 10 1
Output for 5.2.5 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/feSgX on line 10 Warning: implode(): Invalid arguments passed in /in/feSgX on line 10 1
Output for 5.1.0 - 5.2.4
Strict Standards: Only variables should be passed by reference in /in/feSgX on line 10 Warning: implode(): Bad arguments. in /in/feSgX on line 10 1
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/feSgX on line 10
Process exited with code 255.
Output for 4.3.2 - 5.0.4
Warning: implode(): Bad arguments. in /in/feSgX on line 10 1
Output for 4.3.0 - 4.3.1
Warning: implode() [http://www.php.net/function.implode]: Bad arguments. in /in/feSgX on line 10 1