PHP: loops

while-loop

<?php
$i = 1;
while ($i < 9) {
    echo "woot!";
    $i++;
}
?>

for-loop

<?php
for ($i = 1; $i < 9; $i++) {
    echo $i;
}
?>

Exit a Loop

Keyword break can be used to exit a loop.

<?php
for ($i = 1; $i < 9; $i++) {
    echo $i;
    if ($i == 5) {break;}
}
?>

break can take a optional argument that controls the level of nesting to break out.