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<?php var_dump(count(null)); var_dump(count(0)); var_dump(count('zero')); var_dump(count(5)); class Foo implements Countable { public function count() { return 4; } } var_dump(is_array(new Foo));
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 ($value) must be of type Countable|array, null given in /in/LqmvK:3 Stack trace: #0 {main} thrown in /in/LqmvK on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, null given in /in/LqmvK:3 Stack trace: #0 {main} thrown in /in/LqmvK 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/LqmvK on line 3 int(0) Warning: count(): Parameter must be an array or an object that implements Countable in /in/LqmvK on line 4 int(1) Warning: count(): Parameter must be an array or an object that implements Countable in /in/LqmvK on line 5 int(1) Warning: count(): Parameter must be an array or an object that implements Countable in /in/LqmvK on line 6 int(1) bool(false)
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
int(0) int(1) int(1) int(1) bool(false)
Output for 5.0.5
int(0) int(1) int(1) int(1) Fatal error: Interface 'Countable' not found in /in/LqmvK on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.4
int(0) int(1) int(1) int(1) Fatal error: Class 'Countable' not found in /in/LqmvK on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/LqmvK on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/LqmvK on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/LqmvK on line 8
Process exited with code 255.

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