3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'abc'; var_dump($str['1']); var_dump(isset($str['1'])); var_dump($str['1.0']); var_dump(isset($str['1.0'])); var_dump($str['x']); var_dump(isset($str['x'])); var_dump($str['1x']); var_dump(isset($str['1x']));
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
string(1) "b" bool(true) Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/Z2BK2:8 Stack trace: #0 {main} thrown in /in/Z2BK2 on line 8
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.15, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
string(1) "b" bool(true) Warning: Illegal string offset '1.0' in /in/Z2BK2 on line 8 string(1) "b" bool(false) Warning: Illegal string offset 'x' in /in/Z2BK2 on line 11 string(1) "a" bool(false) Notice: A non well formed numeric value encountered in /in/Z2BK2 on line 14 string(1) "b" bool(false)
Output for 7.3.32 - 7.3.33, 7.4.26
string(1) "b" bool(true) Warning: Illegal string offset '1.0' in /in/Z2BK2 on line 8 string(1) "b" bool(false) Warning: Illegal string offset 'x' in /in/Z2BK2 on line 11 string(1) "a" bool(false) string(1) "b" bool(false)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.3 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
string(1) "b" bool(true) string(1) "b" bool(true) string(1) "a" bool(true) string(1) "b" bool(true)
Output for 5.0.0 - 5.0.2
string(1) "b" bool(false) string(1) "b" bool(false) string(1) "a" bool(false) string(1) "b" bool(false)
preferences:
254.03 ms | 401 KiB | 314 Q