PHP 5 for Loops

PHP 5 for Loops

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>";

}

?>

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>";

}

?>

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