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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Convert Hexadecimal to Binary String in PHP</title> </head> <body> <?php // Sample string $str = "Hello World!"; // Converting to hexadecimal $hex = bin2hex($str); echo $hex . "<br>"; // Converting hex to binary string $data = pack("H*", $hex); echo $data; ?> </body> </html>
