获取php中字符之间的字符串

Question

我有输出字符串

Reg. Contact : sip:2001@192.168.50.138:5089;line=6640f2cd1b461a5

我只想要@和之间的IP地址.string。我怎么能得到它？

Answer 1

尝试这样的事情：

<?php
  $input = "Reg. Contact :sip:2001@192.168.50.138:5089;line=6640f2cd1b461a5";
  preg_match('~@(.*?):~', $input, $output);
  echo $output[1]; 
?>

Answer 2

<?php

    $str="Reg. Contact :sip:2001@192.168.50.138:5089;line=6640f2cd1b461a5";
    $start=strpos($str,"@");
    $end= strrpos($str,":");
    $len=$end-$start;
    echo substr($str,$start+1,$len-1);

?>