How do I Get the Last Key of an Array in PHP?

Retrieving the Last Array Key

This question revolves around obtaining the last key in an array.

Solution:

A practical approach involves the combined usage of PHP's end() and key() functions.

• end() advances the internal array pointer to the last element, providing its value.
• key() retrieves the index of the element pointed to by the current internal pointer.

Subsequently, the following code exemplifies this:

<code class="php">$array = array(
    'first' => 123,
    'second' => 456,
    'last' => 789,
);

end($array);         
$key = key($array);  

var_dump($key);</code>

This code will output:

<code class="php">string 'last' (length=4)</code>

indicating the last key in the given array.

It's important to note that the internal pointer will remain at the end of the array after this operation. Consider using reset() to return the pointer to the beginning if desired.

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