array_is_list(): checks if an array is a list

Syntax

array_is_list(array $array): bool

Example 1: Simple Indexed Array

$array = [10, 20, 30]; 
$result = array_is_list($array); 
echo $result ? 'True' : 'False';

True

Example 2: Associative Array

$array = ['a' => 1, 'b' => 2]; 
$result = array_is_list($array); 
echo $result ? 'True' : 'False';

False

Example 3: Array with Mixed Keys

$array = [0 => 'apple', 'x' => 'banana', 1 => 'orange']; 
$result = array_is_list($array); 
echo $result ? 'True' : 'False';

False

Example 4: Empty Array

$array = []; 
$result = array_is_list($array); 
echo $result ? 'True' : 'False';

True

Example 5: Non-sequential Indexed Array

$array = [0 => 'apple', 2 => 'banana', 3 => 'orange']; 
$result = array_is_list($array); 
echo $result ? 'True' : 'False';

False

Example 6 : Not starting with 0 as key

$array = [1=>'Green',2=>'Red',3=>'Blue']; // Not starting with 0
$result = array_is_list($array); 
echo $result ? 'True' : 'False';

False

Example 7 : Starting from negative number

$array = [-1=>'Green',0=>'Red',1=>'Blue']; // Not starting from 0 
$result = array_is_list($array); 
echo $result ? 'True' : 'False';

False

Conclusion