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>";
}
?>
