php源码之字符串与二进制相互转换

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php字符串与二进制相互转换

源码如下：

// 字符串转换为二进制// Should output: 0101001101110100011000010110001101101011$value = unpack('H*', "Stack");echo base_convert($value[1], 16, 2);/*作者：   http://www.manongjc.com   */// 二进制转换为字符串// Should output: Stackecho pack('H*', base_convert('0101001101110100011000010110001101101011', 2, 16));

例外一种方法：

<?php　header("Content-type: text/html; charset=utf-8");　/**　* 将字符串转换成二进制　* @param type $str　* @return type　*/　function StrToBin($str){　//1.列出每个字符　$arr = preg_split('/(?<!^)(?!$)/u', $str);　//2.unpack字符　foreach($arr as &$v){　$temp = unpack('H*', $v); $v = base_convert($temp[1], 16, 2);　unset($temp);　}　return join(' ',$arr);　}　/**　* 讲二进制转换成字符串　* @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("码农教程：www.manongjc.com");;　echo '<br/>';　echo BinToStr("1110000 1101000 1110000 111001001011101010001100 111001101010110010100001 111001011011110010000000 111001011000111110010001 111011111011110010011010 1110111 1110111 1110111 101110 1110000 1101000 1110000 110010 101110 1100011 1100011");

原文地址：http://www.manongjc.com/article/1587.html

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