This function returns the number of characters in a string. It takes a string as an argument. This means The strlen function in PHP is used to return the length of a string. The syntax of the strlen function is:
Let's take a look at the examples below:
<?php echo strlen('PHP arrays'); ?>
<?php echo strlen(' PHP arrays '); ?>
From the above, we see that spaces count towards string length just like a character does.
<&?php $str = "Hello!"; echo strlen($str); ?>