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<?php class Stringable { public function __toString() {die ('hi'); return "A"; } } //var_dump(preg_replace('#A#si','B',$x=new Stringable())); $a=new SplStorageObject(); $a[1]='A'; echo(serialize($a));
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
Fatal error: Cannot declare class Stringable, because the name is already in use in /in/7Idbm on line 3
Process exited with code 255.
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
Fatal error: Uncaught Error: Class 'SplStorageObject' not found in /in/7Idbm:11 Stack trace: #0 {main} thrown in /in/7Idbm on line 11
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Class 'SplStorageObject' not found in /in/7Idbm on line 11
Process exited with code 255.

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