what is echo 1 < 2 in php code example

Example 1: what is echo 1 < 2 in php

<?php \$arr=array ("lets","find", "course",".com"); echo ( array_search (".com", $arr)); ?>

Example 2: php text in thml

<p>Seite abgerufen am <?php echo ( date('d.m.Y \u\m H:i:s') ); ?> Uhr</p>