php loops with example

php loops with example

In PHP, we have the following looping statements:

while - loops through a block of code as long as the specified condition is true
do...while - loops through a block of code once, and then repeats the loop as long as the specified condition is true
for - loops through a block of code a specified number of times
foreach - loops through a block of code for each element in an array

Syntax
while (condition is true) {
code to be executed;
}

<?php 
$x = 1; 

while($x <= 5) {
echo "The number is: $x <br>";
$x++;
} 
?>

Syntax
do {
code to be executed;
} while (condition is true);

<?php 
$x = 1; 

do {
echo "The number is: $x <br>";
$x++;
} while ($x <= 5);
?>

Notice that in a do while loop the condition is tested AFTER executing the statements within the loop. This means that the do while loop would execute its statements at least once, even if the condition is false the first time.

The example below sets the $x variable to 6, then it runs the loop, and then the condition is checked:

Example
<?php 
$x = 6;

do {
echo "The number is: $x <br>";
$x++;
} while ($x<=5);
?>