How to Get Key From a PHP Array

1. Get Keys From a PHP Array Using the array_key Method
2. Get Keys From a PHP Array Using the array_search Method
3. Get Keys From a PHP Array Using the foreach Loop
4. Get Keys From a PHP Array Using the while Loop and the key Method
5. Get Keys From a PHP Array Using Combination of the foreach Loop and array_key Method

We will look at how to get keys from a PHP array using the array_key and array_search methods.

We will also look at how to get keys from a PHP array using the foreach loop, using the while loop and the key method, and using a combination of the foreach loop and the array_key method.

Get Keys From a PHP Array Using the array_key Method

We will create an array with the corresponding key-value pairs and fetch the keys with the array_keys method.

<?php
$profile=array("Name"=>"Kevin","Occupation"=>"Programmer","Hobby"=>"Reading");
    print_r(array_keys($profile));
?>

Output:

Array ( [0] => Name [1] => Occupation [2] => Hobby ) 

Get Keys From a PHP Array Using the array_search Method

We will create an array with the corresponding key-value pairs and fetch the keys with the array_search method.

<?php
$profile=array("Name"=>"Kevin","Occupation"=>"Programmer","Hobby"=>"Reading");
    $key1 = array_search('Kevin', $profile); 
    $key2 = array_search('Programmer', $profile);
    print_r([$key1,$key2])
?>

Output:

Array ( [0] => Name [1] => Occupation ) 

Get Keys From a PHP Array Using the foreach Loop

We will create an array with the corresponding key-value pairs and fetch the keys with the foreach loop.

<?php
$profile=array("Name"=>"Kevin","Occupation"=>"Programmer","Hobby"=>"Reading");
    foreach($profile as $key => $value) {
        echo $key."\n";
    }
?>

Output:

Name
Occupation
Hobby

Get Keys From a PHP Array Using the while Loop and the key Method

We will create an array with the corresponding key-value pairs and fetch the keys with the while loop and the key method.

<?php
$profile=array("Name"=>"Kevin","Occupation"=>"Programmer","Hobby"=>"Reading");
    while($element = current($profile)) {
         echo key($profile)."\n";
         next($profile);
}
?>

Output:

Name
Occupation
Hobby 

Get Keys From a PHP Array Using Combination of the foreach Loop and array_key Method

We will create an array with the corresponding key-value pairs and fetch the keys using a combination of the foreach loop and array_key method.

<?php
$profile=array("Name"=>"Kevin","Occupation"=>"Programmer","Hobby"=>"Reading");
    foreach(array_keys($profile) as $key)
     {
       echo $key."\n";
     }
?>

Output:

Name
Occupation
Hobby