You can recompose a Hex-representation by converting the hexadecimal chars with hexdec(), repacking the component chars, and then using mb_convert_encoding() to convert from UCS-2 into UTF-8. As I mentioned in my answer to your other question, you'll still need to be careful with the output encoding, although here you've specifically requested UTF-8, so we'll use that for the upcoming sample.
Here's a sample that does the work of converting UCS-2 in Hex to UTF-8 in native string form. As PHP currently doesn't ship with a hex2bin() function, which would make things very easy, we'll use the one posted at the reference link at the end. I've renamed it to *local_hex2bin()* just in case it conflicts with a future version of PHP or with a definition in some other 3rd party code that you include in your project.
Locally, I called this sample page UCS2HexToUTF8.php, and then used a querystring to set the output.
UCS2HexToUTF8.php?06450631062d0628064b06270020063906270644064500200021
Here's a sample that does the work of converting UCS-2 in Hex to UTF-8 in native string form. As PHP currently doesn't ship with a hex2bin() function, which would make things very easy, we'll use the one posted at the reference link at the end. I've renamed it to *local_hex2bin()* just in case it conflicts with a future version of PHP or with a definition in some other 3rd party code that you include in your project.
Locally, I called this sample page UCS2HexToUTF8.php, and then used a querystring to set the output.
UCS2HexToUTF8.php?06450631062d0628064b06270020063906270644064500200021
URL: http://stackoverflow.com/questions/2005358/ucs2-hexencoded-characters-to-utf8-in-php
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