how getting the persian character ascii code of a string in php

I want to display the character codes of a string in php.

<?php
$Text = '{"text":"سلام"}';
for($i = 0;$i < strlen($Text);$i++){
    echo mb_ord($Text[$i]),"<br>";
}
?>

But its output is null

Solution

You are trying to get all "bytes" of the unicode string. You need to use mb_strlen() to get the real length of the characters.

Then, you need to use mb_substr() to get the right character.

$Text = '{"text":"سلام"}';
for($i = 0; $i < mb_strlen($Text); $i++) {
    echo mb_ord(mb_substr($Text,$i, 1)), "<br>";
}

Output :