How to check foreach Loop Key Value in PHP ?
In PHP, the foreach loop can be used to loop over an array of elements. It can be used in many ways such as
- To loop through a list of simple values.
- To loop through a list of key-value pairs.
Using the foreach loop with simple values:
We can use the foreach loop to access and use the elements in an array of simple values, such as strings or numbers.
Example 1:
PHP
<?php $names = array("Ramesh", "Suresh", "Ram", "Shyam"); foreach ($names as $value) { echo "$value <br>"; } ?> |
Output:
Ramesh Suresh Ram Shyam
In the above example, each element of the array names is iterated over and is assigned to the variable value.
Example 2:
PHP
<?php $marks = array(45, 78, 93, 69); foreach ($marks as $value) { echo "$value <br>"; } ?> |
Output:
45 78 93 69
Using the foreach loop with Key-Value pairs:
We will use the same foreach loop to iterate over an array of key-value pairs.
Example 3: In this case, an array of students and their marks are taken in the array.
PHP
<?php $markSheet = array("Ramesh"=>45, "Suresh"=>78, "Ram"=>93, "Shyam"=>69); foreach ($markSheet as $key => $val) { echo "$key - $val<br>"; } ?> |
Output:
Ramesh - 45 Suresh - 78 Ram - 93 Shyam - 69
In the example above, we iterate over each array element and then extract the key-value pair into variables key and val respectively.
