How to do int to byte conversion in PHP

How to convert int to bytes in PHP

Converting int to bytes in PHP usually involves converting integer data to bytes Stream for use in network transmission or file storage. In the following example, I will show how to use PHP language to convert integer data to byte stream, and conversely convert the byte stream to integer data.

Convert integer data to byte stream:

// 定义一个整型数据
$intData = 123456;

// 将整型数据转换为字节流
$byteArray = pack('N', $intData);

// 输出字节流
echo bin2hex($byteArray); // 输出16进制表示的字节流

In the above code, we first define an integer data$intData, then use the pack() function to convert the integer data into a byte stream, and use the bin2hex() function to output the byte stream in hexadecimal representation.

Convert the byte stream into integer data:

// 定义一个16进制表示的字节流
$hexData = '0001e240';

// 将16进制表示的字节流转换为整型数据
$intData = unpack('N', hex2bin($hexData))[1];

// 输出整型数据
echo $intData; // 输出整型数据

In the above code, we first define a byte stream represented in hexadecimalhexData, then use the hex2bin() function to convert the hexadecimal byte stream into a binary byte stream, and then use the unpack() function to convert the binary byte stream Convert the stream to integer data.

Through the above code examples, we can see that converting int to bytes in PHP is not complicated. You only need to use the pack() function to convert integer data to bytes. Stream, use the unpack() function to convert the byte stream into integer data. In this way, we can easily convert integer data and byte streams in PHP to meet the needs of different scenarios.

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