array_key_last(): to get the last key of an array

$settings = ['theme' => 'dark', 'language' => 'en'];
$lastKey = array_key_last($settings);
echo $lastKey;

key = array_key_last ($input_array);

Example 1

$input=array(1,2,3,4,5);
echo array_key_last($input);

4

Example 2

$input=array('One' =>'First','Two'=>'Second','Three'=>'Third','Fourth');
echo var_dump(array_key_last($input));

int(0)

Example 3: Using array_key_last() with Numeric Array

<?php
$input = array(10, 20, 30, 40);
echo array_key_last($input);  // Output: 3
?>

Example 4: Using array_key_last() with Associative Array

<?php
$input = array('a' => 'Apple', 'b' => 'Banana', 'c' => 'Cherry');
echo array_key_last($input);  // Output: 'c'
?>

Example 5: Handling an Empty Array

<?php
$emptyArray = array();
echo array_key_last($emptyArray);  // Output: NULL
?>

Example 6: Using array_key_last() After Array Modifications

<?php
$input = array('first' => 100, 'second' => 200, 'third' => 300);
unset($input['third']);
echo array_key_last($input);  // Output: 'second'
?>

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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