PHP Tips #1: foreach
I love foreach loops for their simplicity and readability, but they’re a bit quirky when it comes to PHP. Here’s a couple of tips I’ve picked up.
The following are functionally the same:
<?php
$arr = array("one", "two", "three");
reset($arr);
while (list($key, $value) = each($arr)) {
echo "Key: $key; Value: $value
\n";
}
foreach ($arr as $key => $value) {
echo "Key: $key; Value: $value
\n";
}
?>
Ever want to drive straight into a foreach without checking that the array has elements?
<?php
$non_array = null;
foreach ((array) $non_array as $key => $value) {
echo "Key: $key; Value: $value
\n";
}
?>
Related posts:
