求高手，看下这段正则哪里错了？？

Question

本帖最后由 dz215136304 于 2012-07-05 08:54:58 编辑

Answer 1

$str = preg_replace('#([a-zA-z]+://)([^\'"]*)#e','endecode::showdescurl("$2")',$str);
echo $str;
<a target="_blank" href="go.php?id=7499092"><img src="#">

Answer 2

echo preg_replace('/(?<=href=")[^"]+/e',"endecode::showdescurl('$0')",$str);

Answer 3

楼主想  _id=702397429 换为_go.php?id=702397429  id参数不是数字就_#  吗？

Answer 4

我把代码重新贴一下吧,我这测试完全可以运行，只是你的正则，把图片也给替换了，我现在是只想替换网址，其他的图片路径都不管url.php
include(endecode.class.php);
$str='<a target="_blank" href="http://meal.taobao.com/mealDetail.htm?meal_id=7499092&item_num_id=14204771432&seller_id=702397429">http://www.qq.com</a><img src="http://info-database.csdn.net/Upload/2012-07-02/ibm-db2-190_240-0628.jpg">';$str = preg_replace('#([a-zA-z]+://)([^\'"]*)#e','endecode::showdescurl("$2")',$str);
echo $str;
endecode.class.phpclass endecode{
static function showdescurl($url){
if(strpos($url,'id') !==false){
        preg_match('/id=(\d+)/i',$url,$ar);
        return  'go.php?id='.$ar[1];
     }else{
        return '#';     
     }  

}}

Answer 5

我把代码重新贴一下吧,我这测试完全可以运行，只是你的正则，把图片也给替换了，我现在是只想替换网址，其他的图片路径都不管url.php
include(endecode.class.php);
$str='<a target="_blank" href="http://meal.taobao.com/mealDetail.htm?meal_id=7499092&item_num_id=14204771432&seller_id=702397429">http://www.qq.com</a><img src="http://info-database.csdn.net/Upload/2012-07-02/ibm-db2-190_240-0628.jpg">';$str = preg_replace('#([a-zA-z]+://)([^\'"]*)#e','endecode::showdescurl("$2")',$str);
echo $str;
endecode.class.phpclass endecode{
static function showdescurl($url){
if(strpos($url,'id') !==false){
        preg_match('/id=(\d+)/i',$url,$ar);
        return  'go.php?id='.$ar[1];
     }else{
        return '#';     
     }  

}}

Answer 6

 $str = preg_replace('#(?<=href...)([a-zA-z]+://)([^\'"]*)#e','endecode::showdescurl("$2")',$str); 

Answer 7

你字符串里也没有id=什么的东西啊？不知道你是不是这种意图。[User:root Time:03:58:02 Path:/home/liangdong/php]$ php preg.php 
<a target="_blank" href="go.php?meal_id=7499092&item_num_id=14204771432&seller_id=702397429"><img src="http://info-database.csdn.net/Upload/2012-07-02/ibm-db2-190_240-0628.jpg">[User:root Time:03:58:03 Path:/home/liangdong/php]$ cat preg.php 
<?php
$str = <<<EOF
<a target="_blank" href="http://meal.taobao.com/mealDetail.htm?meal_id=7499092&item_num_id=14204771432&seller_id=702397429"><img src="http://info-database.csdn.net/Upload/2012-07-02/ibm-db2-190_240-0628.jpg">
EOF;
$str = preg_replace_callback('/(<a.*href=")(.*)"/iUs', 'callback', $str);
echo $str;
function callback($matches) {
        $n = preg_match_all('/([^?&]*id)=(\d+)/is', $matches[2], $ret);
        if ($n != 0) {
                $query = "";
                $index = 0;
                foreach ($ret[1] as $name) {
                        $query .= $name . "=" . $ret[2][$index] . "&";
                        ++ $index;
                }
                return $matches[1] . "go.php?" . trim($query, "&") . '"';
        } else {
                return $matches[1] . "#" . '"';
        }
}
?>

Answer 8

$str = preg_replace('#(?<=href...)([a-zA-z]+://)([^\'"]*)#e','endecode::showdescurl("$2")',$str);