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<?php $assoc = array( "a" => 1, "b" => 0, 0 => 0 ); function is_assoc($array){ return !ctype_digit( implode('', ksort(array_keys($array))) ); } echo is_assoc($assoc); ?>
Output for 8.3.0 - 8.3.6
Notice: Only variables should be passed by reference in /in/feSgX on line 10 Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, true given in /in/feSgX:10 Stack trace: #0 /in/feSgX(10): implode('', true) #1 /in/feSgX(13): is_assoc(Array) #2 {main} thrown in /in/feSgX on line 10
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Notice: Only variables should be passed by reference in /in/feSgX on line 10 Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, bool given in /in/feSgX:10 Stack trace: #0 /in/feSgX(10): implode('', true) #1 /in/feSgX(13): is_assoc(Array) #2 {main} thrown in /in/feSgX on line 10
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Only variables should be passed by reference in /in/feSgX on line 10 Warning: implode(): Invalid arguments passed in /in/feSgX on line 10 1
Output for 7.3.32 - 7.3.33
Warning: implode(): Invalid arguments passed in /in/feSgX on line 10 1
Output for 5.2.5 - 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
Strict Standards: Only variables should be passed by reference in /in/feSgX on line 10 Warning: implode(): Invalid arguments passed in /in/feSgX on line 10 1
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.4
Strict Standards: Only variables should be passed by reference in /in/feSgX on line 10 Warning: implode(): Bad arguments. in /in/feSgX on line 10 1
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/feSgX on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.4
Warning: implode(): Bad arguments. in /in/feSgX on line 10 1
Output for 4.3.0 - 4.3.1
Warning: implode() [http://www.php.net/function.implode]: Bad arguments. in /in/feSgX on line 10 1

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