3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = 'Hellm'; for ($i = 0; $i <= count($data); $i++) { $data++; } echo $data;
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in /in/dtFIj:4 Stack trace: #0 {main} thrown in /in/dtFIj on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, string given in /in/dtFIj:4 Stack trace: #0 {main} thrown in /in/dtFIj on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: count(): Parameter must be an array or an object that implements Countable in /in/dtFIj on line 4 Warning: count(): Parameter must be an array or an object that implements Countable in /in/dtFIj on line 4 Warning: count(): Parameter must be an array or an object that implements Countable in /in/dtFIj on line 4 Hello
Output for 7.1.0 - 7.1.33
Hello

preferences:
178.72 ms | 401 KiB | 182 Q