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<?php function emoji_to_unicode($emoji) { if (mb_ord($emoji) < 256) return $emoji; $emoji = mb_convert_encoding($emoji, 'UTF-32', 'UTF-8'); $unicode = strtoupper(preg_replace("/^[0]{3}/","U+",bin2hex($emoji))); return $unicode; } $var = ("😀x😀hello"); $out = ''; for ($i = 0; $i < mb_strlen($var); $i++) { $out .= emoji_to_unicode(mb_substr($var, $i, 1)); } echo "$out\n";
Output for git.master, git.master_jit, rfc.property-hooks
U+1F600xU+1F600hello

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