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<?php echo count(array()); echo count(false); echo count(null); unset($ducks); echo count($ducks); $ducks = 'awesome'; echo count($ducks);
Output for 8.3.0 - 8.3.6
0 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, false given in /in/F2vFH:4 Stack trace: #0 {main} thrown in /in/F2vFH on line 4
Process exited with code 255.
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
0 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, bool given in /in/F2vFH:4 Stack trace: #0 {main} thrown in /in/F2vFH on line 4
Process exited with code 255.
Output for 8.0.0 - 8.0.9
0 Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, bool given in /in/F2vFH:4 Stack trace: #0 {main} thrown in /in/F2vFH on line 4
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
0 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 4 1 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 5 0 Notice: Undefined variable: ducks in /in/F2vFH on line 8 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 8 0 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 11 1
Output for 7.3.32 - 7.3.33, 7.4.26
0 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 4 1 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 5 0 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 8 0 Warning: count(): Parameter must be an array or an object that implements Countable in /in/F2vFH on line 11 1
Output for 5.0.4 - 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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
010 Notice: Undefined variable: ducks in /in/F2vFH on line 8 01
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
010 Notice: Undefined variable: ducks in /in/F2vFH on line 8 01

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