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

 

<!DOCTYPE html>
<html>
<body>

<?php
for ($x = 0; $x <= 10; $x++) {
echo “The number is: $x <br>”;
}
?>

</body>
</html>

 

Output

 

 

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

 

<!DOCTYPE html>
<html>
<body>

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

foreach ($colors as $value) {
echo “$value <br>”;
}
?>

</body>
</html>

 

Output