php字符串取法

     $host ="127.0.0.1:1134:789";
     list($ip,$port,$test)=explode(":",$host);
     echo $ip."---".$port;//输出127.0.0.1---1134
     echo "</br>";
     echo $port;//输出1134
     echo "</br>";
     echo $test;//输出789
     echo "</br>";