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PHP for Loops


PHP for loops execute a block of code a specified number of times.


The PHP for Loop

The for loop is used when you know in advance how many times the script should run.

Syntax

for (init counter; test counter; increment counter) {
    code to be executed;
}

Parameters:

  • init counter: Initialize the loop counter value
  • test counter: Evaluated for each loop iteration. If it evaluates to TRUE, the loop continues. If it evaluates to FALSE, the loop ends.
  • increment counter: Increases the loop counter value

The example below displays the numbers from 0 to 10:

Example

<?php
for ($x = 0; $x <= 10; $x++) {
    echo "The number is: $x <br>";
}
?>
Try it Yourself »

The PHP foreach Loop

The foreach loop works only on arrays, and is used to loop through each key/value pair in an array.

Syntax

foreach ($array as $value) {
    code to be executed;
}

For every loop iteration, the value of the current array element is assigned to $value and the array pointer is moved by one, until it reaches the last array element.

The following example demonstrates a loop that will output the values of the given array ($colors):

Example

<?php
$colors = array("red", "green", "blue", "yellow");

foreach ($colors as $value) {
    echo "$value <br>";
}
?>
Try it Yourself »

You will learn more about arrays in a later chapter.


PHP Exercises

Test Yourself With Exercises

Exercise:

Create a loop that runs from 0 to 9.

 ($i = 0; $i < 10; ) {
  echo $i;
}