Friday, October 23, 2020

PHP array_key_exists() Function



Hello dear readers! welcome back to another section of our tutorial on PHP. In this tutorial, we will be studying about the PHP Function array_key_exists().

PHP array_key_exists() function returns TRUE if the given key is set in the array.

Syntax

Following below is the syntax to use this function -

bool array_key_exists ( $key, $array );


Parameter Details

Sr.NoParameter & Description
1

key(Required)

The key to be searched.

2

array(Required)

This is an array to be searched


Return Value

It returns TRUE if the given key exists in the array, else False.

Example

Try out the below example -

<?php
   $input = array('first' => 10, 'second' => 400);
   
   if (array_key_exists('first', $input)) {
      echo "The 'first' element is in the array";
   }
?> 

Output

When the above code is executed, it will produce the following result -

The 'first' element is in the array


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we will discuss about PHP array_keys() Function.

Feel free to ask your questions where necessary and i will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.

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Thanks for reading and bye for now.
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