How to check foreach Loop Key Value in PHP ?
Last Updated :
10 May, 2021
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.
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