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run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL); $b = null; var_dump($b['foo1']); $b = ""; var_dump($b['foo2']); $b = 345678; var_dump($b['foo3']);
Output for 8.3.0 - 8.3.4
Warning: Trying to access array offset on null in /in/Jc7tr on line 4 NULL Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/Jc7tr:7 Stack trace: #0 {main} thrown in /in/Jc7tr on line 7
Process exited with code 255.
Output for 8.0.9 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
Warning: Trying to access array offset on value of type null in /in/Jc7tr on line 4 NULL Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/Jc7tr:7 Stack trace: #0 {main} thrown in /in/Jc7tr on line 7
Process exited with code 255.
Output for 8.0.0 - 8.0.8
Warning: Trying to access array offset on value of type null in /in/Jc7tr on line 4 NULL Warning: Uninitialized string offset 0 in /in/Jc7tr on line 7 Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/Jc7tr:7 Stack trace: #0 {main} thrown in /in/Jc7tr on line 7
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Notice: Trying to access array offset on value of type null in /in/Jc7tr on line 4 NULL Warning: Illegal string offset 'foo2' in /in/Jc7tr on line 7 Notice: Uninitialized string offset: 0 in /in/Jc7tr on line 7 string(0) "" Notice: Trying to access array offset on value of type int in /in/Jc7tr on line 11 NULL
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
NULL Warning: Illegal string offset 'foo2' in /in/Jc7tr on line 7 Notice: Uninitialized string offset: 0 in /in/Jc7tr on line 7 string(0) "" NULL
Output for 5.2.10 - 5.2.17, 5.3.0 - 5.3.29
NULL Notice: Uninitialized string offset: 0 in /in/Jc7tr on line 7 string(0) "" NULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.9
NULL Notice: Uninitialized string offset: 0 in /in/Jc7tr on line 7 string(0) "" NULL

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