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<?php class Foo { private $a; protected $b; public $c; } class FooCountable implements \Countable { private $elements = [1,2,3]; public function count() { return count($this->elements); } } $tests = [ 'array' => [1,2,3], 'string' => 'hello world', 'number' => 123, 'iterator' => new \ArrayIterator([1,2,3]), 'countable' => new \FooCountable(), 'zero' => 0, 'string_zero' => '0', 'object' => new \Foo(), 'stdClass' => new \stdClass, 'null' => null, 'empty' => '', 'boolt' => true, 'boolf' => false ]; foreach($tests as $key => $test) { echo $key . ': ' . print_r(@count($test), 1) . \PHP_EOL; } echo '---' . \PHP_EOL; echo 'Undefined: ' . @count($undefinedVariable);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Deprecated: Return type of FooCountable::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/nmWmE on line 14 array: 3 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in /in/nmWmE:37 Stack trace: #0 {main} thrown in /in/nmWmE on line 37
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Deprecated: Return type of FooCountable::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/nmWmE on line 14 array: 3 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in /in/nmWmE:37 Stack trace: #0 {main} thrown in /in/nmWmE on line 37
Process exited with code 255.
Output for 8.0.10 - 8.0.30
array: 3 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in /in/nmWmE:37 Stack trace: #0 {main} thrown in /in/nmWmE on line 37
Process exited with code 255.
Output for 8.0.0 - 8.0.9
array: 3 Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, string given in /in/nmWmE:37 Stack trace: #0 {main} thrown in /in/nmWmE on line 37
Process exited with code 255.
Output for 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, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array: 3 string: 1 number: 1 iterator: 3 countable: 3 zero: 1 string_zero: 1 object: 1 stdClass: 1 null: 0 empty: 1 boolt: 1 boolf: 1 --- Undefined: 0
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/nmWmE on line 12
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/nmWmE on line 10 Parse error: syntax error, unexpected '[' in /in/nmWmE on line 12
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/nmWmE on line 10 Parse error: parse error, unexpected '[' in /in/nmWmE on line 12
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/nmWmE on line 5
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 T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/nmWmE on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/nmWmE on line 5
Process exited with code 255.
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