3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = []; var_dump(count($arr)); // will work as expected $a = count(json_decode('{}', true)); var_dump($a); // will throw an error $b = count(json_decode('{}')); var_dump($b);
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
int(0) int(0) Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, stdClass given in /in/4JF9V:13 Stack trace: #0 {main} thrown in /in/4JF9V on line 13
Process exited with code 255.
Output for 8.0.0 - 8.0.9
int(0) int(0) Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, stdClass given in /in/4JF9V:13 Stack trace: #0 {main} thrown in /in/4JF9V on line 13
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
int(0) int(0) Warning: count(): Parameter must be an array or an object that implements Countable in /in/4JF9V on line 13 int(1)
Output for 7.1.0 - 7.1.33
int(0) int(0) int(1)

preferences:
89.65 ms | 409 KiB | 5 Q