php利用函数将二进制转为字符串的两种方法

<?php
header('content-type:text/html;charset=utf-8');   
$str="110100001100101011011000110110001101111";
echo "二进制值：".$str."<br><br>";
$hex=base_convert($str,2,16);
echo "对应16进制值：".$hex."<br><br>";

$res=hex2bin($hex);
echo "对应字符串：".$res;
?>

<?php
header('content-type:text/html;charset=utf-8');   
$str="110100001100101011011000110110001101111";
echo "二进制值：".$str."<br><br>";
$hex=base_convert($str,2,16);
echo "对应16进制值：".$hex;
?>