3v4l.org

run code in 300+ PHP versions simultaneously
<?php $index = "stuff string"; $data = 'foo'; $cache_id = 'bar'; $tmparr = new stdClass; $tmparr->name = $cache_id; $tmparr->size = strlen($data); $index[] = $tmparr; var_dump($index);
Output for 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 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: [] operator not supported for strings in /in/HLGlZ:10 Stack trace: #0 {main} thrown in /in/HLGlZ on line 10
Process exited with code 255.
Output for 5.6.0 - 5.6.24
Fatal error: [] operator not supported for strings in /in/HLGlZ on line 10
Process exited with code 255.
preferences:
124.32 ms | 401 KiB | 231 Q