PHP: bin2hex, hex2bin function

$b5 = '我愛你'; //Traditional Chinese
$gb = '我爱你'; //Simplified Chinese

print 'B5: '.bin2hex($b5);
print 'GB: '.bin2hex($gb);

print 'B5:'.pack("H*", bin2hex($b5));
print 'GB:'.pack("H*", bin2hex($gb));

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