How to convert php to binary

How to convert php to binary: first create a PHP sample file; then define a StrToBin method; then parse the string through the unpack method; and finally convert to binary through the "base_convert" function.

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PHP String to Binary Conversion

I found a method for 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? ?

-------Separator-------

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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