<?php
error_reporting(-1);
mb_internal_encoding('utf-8');
header("Content-Type: text/plain; charset=utf-8");
 
 
function getUtf16Symbols($str) {
    //convert to utf-16be
    $str = iconv("utf-8","utf-16be", $str);
    $symbolList = [];
    for ($i = 0; $i < strlen($str); $i += 2) {
        $symbolList[] = $str[$i] . $str[$i+1];
    }
    return $symbolList;
}
 
function getUtfCodepoint($char) {
    $h = dechex(ord($char[0]))  . dechex(ord($char[1]));
    return  strtoupper("U+" . sprintf("%04s", $h));
}
 
$str = "019azAZаяАЯ $ ½";
echo "String - $str\n";
 
echo "Codepoints list:\n";
 
$originalSymbols = preg_split("//u", $str, null, PREG_SPLIT_NO_EMPTY);
$utf16Symbols = getUtf16Symbols($str);
 
for ($i = 0; $i < count($originalSymbols); $i++) {
    echo $originalSymbols[$i] . " - ";
    echo getUtfCodepoint($utf16Symbols[$i]) . "\n";
}

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