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run code in 150+ php & hhvm versions
Bugs & Features
<?php $keys=array("key1","key2","key3"); $array=array(); $array['key1'] = 'value1'; $cache=&$array; foreach($keys as $key) { $cache=&$cache[$key]; } $cache="value3"; print_r($array);
Output for 7.1.0
Warning: Illegal string offset 'key2' in /in/05rQq on line 8 Fatal error: Uncaught Error: Cannot create references to/from string offsets in /in/05rQq:8 Stack trace: #0 {main} thrown in /in/05rQq on line 8
Process exited with code 255.
Output for 7.0.0 - 7.0.14
Warning: Illegal string offset 'key2' in /in/05rQq on line 8 Fatal error: Uncaught Error: Cannot create references to/from string offsets nor overloaded objects in /in/05rQq:8 Stack trace: #0 {main} thrown in /in/05rQq on line 8
Process exited with code 255.
Output for hhvm-3.10.0 - 3.12.0
Fatal error: Operator not supported for strings in /in/05rQq on line 8
Process exited with code 255.
Output for 5.4.0 - 5.6.22
Warning: Illegal string offset 'key2' in /in/05rQq on line 8 Fatal error: Cannot create references to/from string offsets nor overloaded objects in /in/05rQq on line 8
Process exited with code 255.
Output for 4.3.2 - 5.2.17, 5.3.2 - 5.3.29
Fatal error: Cannot create references to/from string offsets nor overloaded objects in /in/05rQq on line 8
Process exited with code 255.
Output for 5.3.0 - 5.3.1

Process exited with code 139.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot create references to/from string offsets nor overloaded objects in /in/05rQq on line 8