PHP 字符串二进制相互转换

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);
}






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);
}