Loops
A loop is a control structure that allows to execute a block of code repeatedly based on a specified condition. Loops are essential for automating repetitive tasks and processing arrays or collections of data. PHP provides several types of loops, including: for, while, do…while and foreach.
The most popular loop is foreach().
Loops may hide in certain functions: for example, array_map() and array_walk() apply a method to every element in an array.
Generators are closely related to the foreach() loop.
<?php
foreach([11,12,13] as $id => $value) {
print "$id => $value\n";
}
for ($i = 1; $i <= 10; $i++) {
echo $i;
}
$i = 10;
while ($i <= 10) {
echo $i++;
}
$i = 10;
do {
echo $i++;
} while ($i <= 10);
?>