php二进制输出|php字符转二进制|php二进制字符转换

php里面没有直接将字符转换成二进制输出的函数
但是可以通过中间函数来实现
过程如下：
              正向：单字符 =》ord() =》ASCII十进制 =》decbin() =》二进制表示
              逆向：二进制 =》 bindec() =》ASCII十进制 =》chr() =》字符实体

 
<?php
header('Content-type:text/html; charset=utf-8');
  
class binaryString{
      
    protected $split = '&';
      
    public function bin2str($bin, $str = ''){
        $list = explode($this->split, $bin);
        foreach($list as $val){
            $str .= chr(bindec($val));  
        }
        return $str;
    }
      
    public function str2bin($str, $bin = array()){
        $len = mb_strlen($str);
        for($i = 0; $i < $len; $i ++){
            $bin[] = decbin(ord($str{$i}));
        }
        return implode($this->split, $bin);
    }
          
}
  
$b = new binaryString;
  
echo $s = $b->str2bin('这是字符转二进制输出的示例');
  
echo $b->bin2str($s);