How to convert php into binary string

php method to convert a string into a binary string: first create a PHP sample file; then use the "function StrToBin($str){...}" method to convert the string into binary.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

PHP string and binary conversion

I found a method of converting string to binary on the Internet (the relevant problem description and problems are in the following code, please read it patiently, thank you):

/** * 将字符串转换成二进制 * @param type $str * @return type * php 中显示的字符串是多少进制的？？ * 例如：$str = '你好'; // 这边的 '你好' 是什么进制数据（我知道他是字符串！）?? */ function StrToBin($str){ //1.列出每个字符 // 这边的分割正则也不理解 // (?'; echo BinToStr("1110000 1101000 1110000 111001001011101010001100 111001101010110010100001 111001011011110010000000 111001011000111110010001 111011111011110010011010 1110111 1110111 1110111 101110 1110000 1101000 1110000 110010 101110 1100011 1100011");

How do the above functions realize conversion between binary and string? ?

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I already know about pack and unpack! By the way, let me share:

Let’s use this example to talk about what I understand:

pack usage:

// 二进制数字 => 二进制字符串 $bin_number = '这边是二进制数字'; $hex = bin2hex($bin_number ); // 由于指定了 H(16进制，高位在前)，所以第二个参数需要使 16 进制字字符串 // strlen($hex) 指定打包多少个 16 进制字符串 // 也可以使用 * 来自动识别 // 结果就是：二进制字符串了 $bin_str = pack('H' . strlen($hex) , $hex); <=> $dec = bindec($bin_number); $hex = dechex($dec); $bin_str = hex2bin($hex); unpack 用法： // 转换作用：2进制字符串 => 16进制字符串 $str = unpack('H*' , '陈'); <=> $str = bin2hex('陈');

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