(PHP 8 >= 8.1.0)
array_is_list — Checks whether a given array is a list
$array): bool
Determines if the given array is a list.
An array is considered a list if its keys consist of consecutive numbers
from 0 to count($array)-1.
arrayThe array being evaluated.
Returns true if array is a list, false
otherwise.
示例 #1 array_is_list() example
<?php
array_is_list([]); // true
array_is_list(['apple', 2, 3]); // true
array_is_list([0 => 'apple', 'orange']); // true
// The array does not start at 0
array_is_list([1 => 'apple', 'orange']); // false
// The keys are not in the correct order
array_is_list([1 => 'apple', 0 => 'orange']); // false
// Non-integer keys
array_is_list([0 => 'apple', 'foo' => 'bar']); // false
// Non-consecutive keys
array_is_list([0 => 'apple', 2 => 'bar']); // false
?>
注意:
This function returns
trueon empty arrays.