PHP How to splice binary data into a string

How does PHP stitch binary data into strings?
For example, the character "You" of the UTF8 code is "e4bda0".
Now there is an array of $arr

$arr = Array (chr (228), Chr (189), Chr (160));

How do you stitch it up into a piece that allows it to print out the characters "you"?
Ask for help binary php utf-8 encoding

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------Solution--------------------

$arr = Array (chr (228), Chr (189), Chr (160));
echo Join ("', $arr); You
The echo $v of the foreach ($arr as $v);
for ($i =0; $i
 
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Echo Pack (' h* ', ' e4bda0 ');
echo hex2bin (' e4bda0 ');
  
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