php二进制与字符串之间的相互转换 　[代码]php代码：
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
$arr = preg_split('/(?
//2.unpack字符
foreach($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(php二次开发：www.php2.cc);;
echo '
';
echo bintostr(1110000 1101000 1110000 111001001011101010001100 111001101010110010100001 111001011011110010000000 111001011000111110010001 111011111011110010011010 1110111 1110111 1110111 101110 1110000 1101000 1110000 110010 101110 1100011 1100011);
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