3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo substr(null, 0, 2); echo substr(null, -4); echo substr(array(), 0, 2);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /in/oj6cC on line 3 Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /in/oj6cC on line 4 Fatal error: Uncaught TypeError: substr(): Argument #1 ($string) must be of type string, array given in /in/oj6cC:5 Stack trace: #0 /in/oj6cC(5): substr(Array, 0, 2) #1 {main} thrown in /in/oj6cC on line 5
Process exited with code 255.
Output for 8.0.0 - 8.0.30
Fatal error: Uncaught TypeError: substr(): Argument #1 ($string) must be of type string, array given in /in/oj6cC:5 Stack trace: #0 /in/oj6cC(5): substr(Array, 0, 2) #1 {main} thrown in /in/oj6cC on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: substr() expects parameter 1 to be string, array given in /in/oj6cC on line 5
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 - 5.2.17
Notice: Array to string conversion in /in/oj6cC on line 5 Ar
preferences:
318.13 ms | 402 KiB | 459 Q