How to Convert Byte Array to String in PHP? Last Updated : 31 Jul, 2024 Comments Improve Suggest changes Like Article Like Report Given a Byte Array, the task is to convert the byte array to a String in PHP. It is used in various scenarios, such as processing binary data, handling file uploads, or working with data transmission protocols. Below are the approaches to convert byte array to string in PHP:Table of ContentWhat is a Byte Array?Using implode() FunctionUsing pack() FunctionUsing chr() Function in a LoopUsing array_reduce() FunctionWhat is a Byte Array?A byte array is a sequence of bytes, where each byte is an 8-bit unsigned integer. In PHP, byte arrays are typically represented using strings since PHP strings are essentially sequences of bytes.Using implode() FunctionThe implode() function is used to join array elements with a string. By using an empty string as the separator, we can join the elements of a byte array into a single string.Example: Below are the approaches to convert byte array to string in PHP: PHP <?php $byteArr = [ 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100 ]; $str = implode(array_map("chr", $byteArr)); echo $str; ?> OutputHello WorldExplanation:array_map("chr", $byteArray) converts each byte in the array to its corresponding character.implode joins these characters into a single string.Using pack() FunctionThe pack() function is used to pack data into a binary string. Using the format character C*, we can convert an array of bytes into a string.Example: Below are the approaches to convert byte array to string in PHP: PHP <?php $byteArr = [ 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100 ]; $str = pack("C*", ...$byteArr); echo $str; ?> OutputHello WorldExplanation:C* is the format character for unsigned char (byte)....$byteArray unpacks the array elements as individual arguments to pack.Using chr() Function in a LoopThe chr() function returns a one-character string containing the character specified by the ASCII value. We can iterate over the byte array and concatenate the characters to form a string.Example: Below are the approaches to convert byte array to string in PHP: PHP <?php $byteArr = [ 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100 ]; $str = ''; foreach ($byteArr as $byte) { $str .= chr($byte); } echo $str; ?> OutputHello WorldExplanation:Initialize an empty string.Iterate over the byte array.Convert each byte to its corresponding character using chr.Concatenate the character to the string.Using array_reduce() FunctionThe array_reduce() function iteratively applies a callback function to each element of the array, carrying forward the result of the previous iteration. We can use this function to concatenate each byte, converted to a character, into a string.Example: Below are the approaches to convert byte array to string in PHP: PHP <?php $byteArr = [ 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100 ]; $str = array_reduce($byteArr, function($carry, $item) { return $carry . chr($item); }, ''); echo $str; ?> OutputHello World Comment More infoAdvertise with us Next Article How to Convert Byte Array to String in PHP? Anonymous Improve Article Tags : PHP Similar Reads How to Convert Number to Character Array in PHP ? Given a number, the task is to convert numbers to character arrays in PHP. It is a common operation when you need to manipulate or access individual digits of a number. 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