PHP正则表达式IMG标签转换问题，谢谢！！

偶用SimpleXML做，可以忽略很多不必要的复杂性$str = '<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachimg_235058" width="321" height="199" alt="" />';
$xml = new SimpleXMLElement($str);preg_match("/\d+$/", $xml[aid], $aid);$out = "[localing={$aid[0]},{$xml[width]},{$xml[height]}]";
echo $out."\n";

$str = preg_replace('(<img.*?aid.*?)(\d+)(.*?width.*?)(\d+)(.*?height.*?)(\d+)(.*?/>)',"[localimg=".$2.",".$4.",".$6."]" ,$str)

$str = preg_replace('( <img.*?aid.*?)(\d+)(.*?width.*?)(\d+)(.*?height.*?)(\d+)(.*?/>)',"[localimg=$2,$4,$6]" ,$str)
这个试试

$str = preg_replace('(<img.*?aid.*?)(\d+)(.*?width.*?)(\d+)(.*?height.*?)(\d+)(.*?/>)',"[localimg=$2,$4,$6]" ,$str)
这个试试

非常感谢２位老兄的帮忙，特别是myvicy老兄！！
实际上我就是想用preg_replace转换的，但是利用了myvicy老兄的代码，程序执行报错，还请帮忙！！
Warning: preg_replace() [function.preg-replace]: Unknown modifier '(

$str=preg_replace('/<img.*?aid="?[^"]*_(\d+)"?\s+width="?([^"]+)"?\s+height="?([^"]+)"?[^>]+>/','[localimg=$1,$2,$3]',$str);

还有发的代码有可能csdn在正则中自动加空格，如果发现有请删除一下．

利用下面代码搞定！！$str=preg_replace('/<img.*?aid="?[^"]*_(\d+)"?\s+width="?([^"]+)"?\s+height="?([^"]+)"?[^>]+>/','[localimg=$1,$2,$3]',$str);
不过现在遇到新的问题了
<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100001" width="321" height="199" alt="" />
<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100002" width="321" alt="" />
<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100003" height="199" alt="" />
<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100004" alt="" />如何实现不含有width或height的img标签转为
[localimg=235058,0,0]
[localimg=235058,321,0]
[localimg=235058,0,199]
谢谢！！！

<?php
//下面的$str是你要分析的签
$str = '<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100003" height="199" alt="" />';
$xml = new SimpleXMLElement($str);
preg_match("/\d+$/", $xml[aid], $aid);
//进行判断,没有设0
if($xml[width]=="")$xml[width]=0;
if($xml[height]=="")$xml[height]=0;
$out = "[localing={$aid[0]},{$xml[width]},{$xml[height]}]";
echo $out."\n";
?>

<?php
  $text = '<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100001" width="321" height="199" alt="" />';
  $text.='<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100002" width="321" alt="" />';

  // 回调函数
  function formatimg($matches) {
   if($2=="")$2=0
   if($3=="")$3=0
   return "[localimg=".$1.",".$2.",",$3."]"
  }  echo preg_replace_callback(
              "/<img.*?aid="?[^"]*_(\d+)"?\s+width="?([^"]+)"?\s+height="?([^"]+)"?[^>]+>/",
              "formatimg",
              $text);
?>

<?php
  $text = '<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100001" width="321" height="199" alt="" />';
  $text.='<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100002" width="321" alt="" />';

  // 回调函数
  function formatimg($matches) {
   if($2=="")$2=0
   if($3=="")$3=0
   return "[localimg=".$1.",".$2.",".$3."]"
  }  echo preg_replace_callback(
              "/<img.*?aid="?[^"]*_(\d+)"?\s+width="?([^"]+)"?\s+height="?([^"]+)"?[^>]+>/",
              "formatimg",
              $text);
?>

这要执行二次替换才行
$str=preg_replace('/<img.*?aid="?[^"]*_(\d+)"?\s*(?:width="?([^"]+)"?)?\s*(?:height="?([^"]+)"?)?[^>]+>/','[localimg=$1,$2,$3]',$str);
$str=preg_replace('/((?<=,)(?=,)|(?<=,)(?=\]))/','0',$str);

<?php
  $text = '<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100001" width="321" height="199" alt="" />';
  $text.='<img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" aid="attachment_100002" width="321" alt="" />';

  // 回调函数
  function formatimg($matches) {
   if($matches[2]=="")$matches[2]=0
   if($matches[3]=="")$matches[3]=0
   return "[localimg=".$matches[1].",".$matches[2].",".$matches[3]."]"
  }  echo preg_replace_callback(
              "/<img.*?aid="?[^"]*_(\d+)"?\s+width="?([^"]+)"?\s+height="?([^"]+)"?[^>]+>/",
              "formatimg",
              $text);
?>

非常感谢myvicy，我继续学习，现在先结帖！！！

$text = ' <img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" ai
d="attachment_100001" width="321" height="199" alt="" />';
//$text.=' <img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" a
id="attachment_100002" width="321" alt="" />';
//$text.=' <img src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" border="0" a
id="attachment_100003" alt="" />';
if(preg_match_all('/<img.*?aid="?[^"]*_(\d+)"?\s+?(?:width="?([^"]+)"?)?(?:\s+)?(?:height="?([^"]+)"?)?[^>]+>/',$text,$s)){
  $c = count($s);
  $r = count($s[0]);
  foreach(range(1,$r) as $num){
    $mm =array();
    for ($i = 1;$i< $c;$i++) {
        $mm[] = $s[$i][$num-1]|0;
    }
    $result[] = '[localimg='.join(",",$mm).']';
  }
  print_r($result);
}

不好意思，已经结帖了，明天再来给你加分！！！
/Aylazhang

首先谢谢各位老兄的大力帮助，不过现在遇到了新的问题，还是请各位老兄继续能帮忙！！我发现我的img代码并不是很规则，现在遇到的情况就是：
<img height="199" src="http://www.discuz.net/attachments/month_0803/20080311_016edd593adc1dddc92eYbiEXWHyCwMZ.gif" width="321" border="0" aid="attachment_100001" />
类似与这样的标签如何转换，谢谢！！

调试易

PHP正则表达式IMG标签转换问题，谢谢！！

解决方案 »