3v4l.org

run code in 300+ PHP versions simultaneously
<?php $so = new \stdClass; $so->a = 1; $obj = new \stdClass(); $obj->z = $so; $arr = array(new \stdClass(), array('a' => 1, 'b' => $so, 'c' => $obj), $so); $result = @json_encode($arr, 0, 4);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 4.3.0 - 4.3.1, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/rgv2f on line 3 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/rgv2f on line 6 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/rgv2f on line 9
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/rgv2f on line 3 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/rgv2f on line 6 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/rgv2f on line 9
Process exited with code 255.
preferences:
191.13 ms | 402 KiB | 380 Q