PHP: Convert Unicode Codepoint to Utf-8

PHP: Convert unicode codepoint to UTF-8

$utf8string = html_entity_decode(preg_replace("/U\+([0-9A-F]{4})/", "&#x\\1;", $string), ENT_NOQUOTES, 'UTF-8');

is probably the simplest solution.

Convert unicode special characters to UTF-8

At the very least your regular expression is looking for an uppercase U, while all your escape sequences use lower-case.

But your conversion script goes from javascript-escaped unicode characters, to HTML entities, back to a PHP string. This might be a saner solution (for this string):

$unicode = '\u0411. \u0426\u044d\u0446\u044d\u0433\u0441\u04af\u0440\u044d\u043d';
echo json_decode('"' . $unicode . '"');

Be careful though, as this might break if the input string contains newlines or quotes.

How to Convert string to utf-8 codepoint in php

I found the answer but it return array here

I Edit the function to return String.

function utf8_to_unicode($str) {

    $unicode = array();        
    $values = array();
    $lookingFor = 1;

    for ($i = 0; $i < strlen($str); $i++) {

        $thisValue = ord($str[$i]);

        if ($thisValue < 128) 
            $unicode[] = str_pad(dechex($thisValue), 4, "0", STR_PAD_LEFT);
        else {
            if (count($values) == 0) $lookingFor = ($thisValue < 224) ? 2 : 3;                
            $values[] = $thisValue;                
            if (count($values) == $lookingFor) {
                $number = ($lookingFor == 3) ?
                (($values[0] % 16) * 4096) + (($values[1] % 64) * 64) + ($values[2] % 64):
                (($values[0] % 32) * 64) + ($values[1] % 64);
                $number = strtoupper(dechex($number));
                $unicode[] = str_pad($number, 4, "0", STR_PAD_LEFT);
                $values = array();
                $lookingFor = 1;
            } // if
        } // if
    } // for
    $str="";
    foreach ($unicode as $key => $value) {
        $str .= $value;
    }


    return ($str);   
} // utf8_to_unicode

UTF-8 to Unicode Code Points

Converting one character set to another can be done with iconv:

http://php.net/manual/en/function.iconv.php

Note that UTF is already an Unicode encoding.

Another way is simply using htmlentities with the right character set:

http://php.net/manual/en/function.htmlentities.php

PHP Unicode codepoint to character

You don't need to convert integer to hexadecimal string, instead use IntlChar::chr:

echo IntlChar::chr(127468);

Directly from docs of IntlChar::chr:

Return Unicode character by code point value

How to convert a UTF-8 string to HEX codepoint in PHP?

I take json_encode for multibyte characters and assemble it for the ASCII characters.

function utf8toUnicode($str){
  $unicode = "";
  $len = mb_strlen($str);
  for($i=0;$i<$len;$i++){
    $utf8char = mb_substr($str,$i,1);
    $unicode .= strlen($utf8char)>1
      ?trim(json_encode($utf8char),'"')
      :('\\u00'.bin2hex($utf8char))
    ;
  }
  return $unicode;
} 

$str = 'sÆs'; 

echo utf8toUnicode($str);  // \u0073\u00c6\u0073

PHP - convert unicode to character

"%uXXXX" is a non-standard scheme for URL-encoding Unicode characters. Apparently it was proposed but never really used. As such, there's hardly any standard function that can decode it into an actual UTF-8 sequence.

It's not too difficult to do it yourself though:

$string = '%u05E1%u05E2';
$string = preg_replace('/%u([0-9A-F]+)/', '&#x$1;', $string);
echo html_entity_decode($string, ENT_COMPAT, 'UTF-8');

This converts the %uXXXX notation to HTML entity notation &#xXXXX;, which can be decoded to actual UTF-8 by html_entity_decode. The above outputs the characters "סע" in UTF-8 encoding.

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