Answers for "why do we use strlen in php"

get number of chars ina string php

$name = "Perú"; // With accent mark
echo strlen($name); // Display 5, because "ú" require 2 bytes.

$name = "Peru"; // Without accent mark
echo strlen($name); // Display 4

string length php

<?php
$str = 'php';
echo strlen($str); // 3

$str = 's p a c e';
echo strlen($str); // 9
?>