PHP foreach Loop - Tutorial And Example

PHP foreach Loop with Example

PHP foreach loop is used to loop through the associative arrays.

Syntax:


foreach($array as $key => $value)
{
//Statement
}

foreach($array as $key => $value)

{

//Statement

}

$array = associative array.
$key = array key.
&value = array keys value.

$key and $value variables can be named anything. The $key will be equal to the arrays key, and $value will be equal to that key`s value.

The loop ends when the last array key (=>) value pair reached.

Associative Array Example:


$arrayname = array(‘key’ =>value, ‘key’ =>value);

$arrayname = array(‘key’ =>value, ‘key’ =>value);

Associative array have named keys. The key names are placed inside single or double quotes and the (=>) is used to assign key value pairs.


<?php
 $students = array('Henry' => 21, 'George' => 19, 'Jonny' => 15);
foreach ($students as $name => $age) {
echo $name.' '.$age.'<br/>';
 }

<?php

$students = array('Henry' => 21, 'George' => 19, 'Jonny' => 15);

foreach ($students as $name => $age) {

echo $name.' '.$age.'<br/>';

}

Output:


Henry 21
George 19
Jonny 15

Henry 21

George 19

Jonny 15

In the above program, we are using an associative array here $students with three keys/values, and we are printing the value of each array element through a foreach loop and an echo function for printing results.

Example2:


<?php
$fruits= array("Mango","Orange","Strawberry");
foreach($fruits as $t)
{
echo $t."<br>";
}
?>

<?php

$fruits= array("Mango","Orange","Strawberry");

foreach($fruits as $t)

{

echo $t."<br>";

}

Output:


Mango
Orange
Strawberry

Mango

Orange

Strawberry

In the above program, an array of$fruits contains three elements. For each loop iteration, here the value of current array element is assigning to the variable $t, an array pointer is moving by one and displaying the value of each array element until the last array element found.

Example3:


<?php
function sub()
 {
$s=array("PHP","JAVA","C","R");
foreach ($s as $a)
 {
echo $a."<br>";
}
 }         
sub();
?>

<?php

function sub()

{

$s=array("PHP","JAVA","C","R");

foreach ($s as $a)

{

echo $a."<br>";

}

sub();

Output:


PHP
JAVA
C
R

PHP

JAVA

In the above program, we are using a user-defined function sub, and the function body is containing an array $s with four elements, and we are displaying the value of each array element using a foreach loop.

Example4:


<?php
function fruit($f)
{
foreach($f as $s)
{
echo $s."<br>";
}
}
$f1=array("Apple","Cherry");
fruit($f1); //calling function by passing array
?>

<?php

function fruit($f)

{

foreach($f as $s)

{

echo $s."<br>";

}

$f1=array("Apple","Cherry");

fruit($f1); //calling function by passing array

Output:


Apple
Cherry

Apple

Cherry

In the above, program is containing a user-defined function fruit, and an array is passing as an argument to the function. The function is containing a foreach loop, through this loop we are displaying the value of each array element with an echo statement. When a function is called, then the function body will be executed.