3v4l.org

run code in 300+ PHP versions simultaneously
<?php $object = (object) array( 'entity_id' => 99, ); var_dump($object->entity_id); $array = array( (object) array( 'id' => 99, ), ); $array = array( NULL, ); var_dump($array, array_flip($array)); //var_dump($array->entity_id);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(99) Warning: array_flip(): Can only flip string and integer values, entry skipped in /in/6Mc80 on line 18 array(1) { [0]=> NULL } array(0) { }
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
int(99) Warning: array_flip(): Can only flip STRING and INTEGER values! in /in/6Mc80 on line 18 array(1) { [0]=> NULL } array(0) { }
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/6Mc80 on line 20
Process exited with code 255.
Output for 4.3.0 - 4.3.1
int(99) Warning: array_flip() [http://www.php.net/function.array-flip]: Can only flip STRING and INTEGER values! in /in/6Mc80 on line 18 array(1) { [0]=> NULL } array(0) { }

preferences:
236.48 ms | 402 KiB | 340 Q