Conversion between PHP binary and string_PHP tutorial

Conversion between PHP binary and string

[Code]php code:

　<?php

Header("Content-type: text/html; charset=utf-8");

　/**

　* Convert string to binary

* @param type $str

* @return type

*/

Function StrToBin($str){

//1. List each character

　$arr = preg_split('/(?<!^)(?!$)/u', $str);

//2.unpack characters

foreach($arr as &$v){

　$temp = unpack('H*', $v); $v = base_convert($temp[1], 16, 2);

unset($temp);

　}

return join(' ',$arr);

　}

　/**

* Convert binary to string

* @param type $str

* @return type

*/

Function BinToStr($str){

　$arr = explode(' ', $str);

foreach($arr as &$v){

　$v = pack("H".strlen(base_convert($v, 2, 16)), base_convert($v, 2, 16));

　}

return join('', $arr);

　}

echo StrToBin("php secondary development: www.php2.cc");;

echo '<br/>';

echo BinToStr("1110000 1101000 1110000 111001001011101010001100 111001101010110010100001 111001011011110010000000 111001011 000111110010001 11101111011110010011010 1110111 1110111 1110111 101110 1110000 1101000 1110000 110010 101110 1100011 110001 1");

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