php - how to convert unicode to utf-8 string - php

Question

I've a string like this :
%d8%b7%d8%b1%d8%a7%d8%ad%db%8c-%d8%a7%d9%be%d9%84%db%8c%da%a9%db%8c%d8%b4%d9%86-%d9%81%d8%b1%d9%88%d8%b4%da%af%d8%a7%d9%87%db%8c
the meta tag of page is set to utf-8
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
i want to convert this unicode to pure readable utf-8 string
I've tested lots of code ,thie is my last code :
function convertFarsi($str) {
return html_entity_decode(preg_replace('/\\\\u([a-f0-9]{4})/i', '&#x$1;', $str),ENT_QUOTES, 'UTF-8');
}
and it doesn't work.
How can I convert these unicode to utf8 string ?

Answer 1

You can use url_decode to get the following result:
<?php
$string = '%d8%b7%d8%b1%d8%a7%d8%ad%db%8c-%d8%a7%d9%be%d9%84%db%8c%da%a9%db%8c%d8%b4%d9%86-%d9%81%d8%b1%d9%88%d8%b4%da%af%d8%a7%d9%87%db%8c';
$outpout = urldecode($string);
echo $outpout; // طراحی-اپلیکیشن-فروشگاهی

Answer 2

This function doesn't decode unicode characters. I wrote a function that does.
function unicode_urldecode($url)
{
preg_match_all('/%u([[:alnum:]]{4})/', $url, $a);
foreach ($a[1] as $uniord)
{
$dec = hexdec($uniord);
$utf = '';
if ($dec < 128)
{
$utf = chr($dec);
}
else if ($dec < 2048)
{
$utf = chr(192 + (($dec - ($dec % 64)) / 64));
$utf .= chr(128 + ($dec % 64));
}
else
{
$utf = chr(224 + (($dec - ($dec % 4096)) / 4096));
$utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64));
$utf .= chr(128 + ($dec % 64));
}
$url = str_replace('%u'.$uniord, $utf, $url);
}
return urldecode($url);
}
Source
Demo

Answer 3

This seems to do it:
<?php
$s = '%d8%b7%d8%b1%d8%a7%d8%ad%db%8c-%d8%a7%d9%be%d9%84%db%8c%da%a9%db%8c%d8%b4%d9%86-%d9%81%d8%b1%d9%88%d8%b4%da%af%d8%a7%d9%87%db%8c';
$t = urldecode($s);
var_dump($t == 'طراحی-اپلیکیشن-فروشگاهی');
https://php.net/function.urldecode