3v4l.org

run code in 300+ PHP versions simultaneously
<?php $word = "Capuaalo"; $length = count($word); $count = 0; for($i = 0; $i < $length; $i++) { if($search = substr($word, $i, 1)=="a"){ $count = $count + 1; } } echo $length; echo substr($word, 0, 1); echo $count; ?>
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in /in/RTsv5:3 Stack trace: #0 {main} thrown in /in/RTsv5 on line 3
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/RTsv5:3 Stack trace: #0 {main} thrown in /in/RTsv5 on line 3
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/RTsv5 on line 3 1C0
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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
1C0

preferences:
231.89 ms | 404 KiB | 359 Q