The array_is_list() function is an inbuilt function in PHP that is used to check whether a given array is a list or not. If the given array will be a list if the key of the array contains consecutive numbers from 0 to count($arr)-1.
Syntax:
bool array_is_list(array $array)
Parameters: This function accepts one parameter $array that will check for the list.
Return Value: This function returns true if the given array is a list and false otherwise.
Note: This function returns true on an empty array.
Example 1:
PHP
<?php $arr1 = array("10", "20", "30", "40", "50"); var_dump(array_is_list($arr1)); $arr2 = array( 'Geeks' => "HTML", 'GFG' => "CSS", 'Geek' => "JavaScript", 'G4G' => "PHP"); var_dump(array_is_list($arr2)); ?> |
Output:
bool(true) bool(false)
Example 2:
PHP
<?php var_dump(array_is_list([])); var_dump(array_is_list(array( "10" => "Geeks", "20" => "neveropen", "30", "40", "50"))); var_dump(array_is_list( array(5, 10, 15, 20, 25) )); ?> |
Output:
bool(true) bool(false) bool(true)
Note: This function works on PHP 8.1.0 or higher versions.
Reference: https://www.php.net/manual/en/function.array-is-list.php
