替换结构再判断

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请说明你的规则../Documents/medies/ESIL_xiaoshengqi1.gif
这个乍来的
Image:ESIL_xiaoshengqi1.gif 这个呢？width="550" height=" 400"  这个呢？？？上面有两个，需要哪个？
<object>直接去掉就可以了
然后就是改
<embed src="/images/1/17/ESIL_xiaoshengqi2.swf" width="550" height="400" bgcolor="#FFFFFF" scale="exactfit" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"></embed>为<img src="../Documents/medies/ESIL_xiaoshengqi2.gif" alt="Image:ESIL_xiaoshengqi2.gif" width="550" height=" 400" longdesc="/index.php/Image:ESIL_xiaoshengqi2.gif" />../Documents/medies/ESIL_xiaoshengqi1.gif
这个是相对路径
参考一下：
$s=<<<html
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="550" height="400" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0"><param name="movie" value="/images/1/17/ESIL_xiaoshengqi2.swf"><param name="bgcolor" value="#FFFFFF"><param name="scale" value="exactfit">
<embed src="/images/1/17/ESIL_xiaoshengqi2.swf" width="1000" height="400" bgcolor="#FFFFFF" scale="exactfit" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"></embed> </object>
html;$r= preg_replace('#.+<embed\s*src="(.*?)/([^"]+)"\s*width="(\d+)"\s*height="(\d+)"[^>]*>.+#s','<img src="../Documents/medies/$2" alt="Image:$2" width="$3" height="$4" longdesc="/index.php/Image:$2" />',$s);preg_match('#width="(\d+)"\s*height="(\d+)"#i',$r,$m);
if($m[1]>805){
         $h=($m[2]*805)/$m[1] ;
$r=preg_replace('/(width=)"(\d+)"(\s*height=)"(\d+)"/s','$1"$2"$3"'.$h.'"',$r);
}
echo $r;
while($rows = mysql_fetch_array($query))
{
$pid = $rows['page_id'];
$ptext = $rows['page_text'];
$ptext = preg_replace('#<object.+<embed\s*src=(.*?)"../Documents/medies/([^"]+).swf"\s*width="(\d+)"\s*height="(\d+)"[^>]*>.+</object>#i','<img src="../Documents/medies/$2.gif" alt="Image:$2.gif" width="$3" height="$4" longdesc="/index.php/Image:$2.gif" />',$ptext);

preg_match('#width="(\d+)"\s*height="(\d+)"#i',$ptext,$m);
if($m[1]>805){
$h=($m[2]*805)/$m[1] ;
$k=805;
$ptext = preg_replace('/(width=)"(\d+)"(\s*height=)"(\d+)"/i','$1"'.$k.'"$3"'.$h.'"',$ptext);
}现在是这样写，但是如果有宽度超过805的，那么所有的<img src ...>中的宽度和高度都会被替换，该怎么改呢？
那么你要替换的img与其他的img有区别吗？差异表现在哪？
差异就是width的值和img名，就是上面$2的值不一样
$s =<<< TXT
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="550" height="400" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0"><param name="movie" value="/images/1/17/ESIL_xiaoshengqi2.swf"><param name="bgcolor" value="#FFFFFF"><param name="scale" value="exactfit">
<embed src="/images/1/17/ESIL_xiaoshengqi2.swf" width="1550" height="400" bgcolor="#FFFFFF" scale="exactfit" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"></embed> </object>
TXT;
$r= preg_replace_callback('#.+<embed\s*src="(.*?)/([^"]+)"\s*width="(\d+)"\s*height="(\d+)"[^>]*>.+#s', 'back', $s);function back($r) {
  if($r[3] > 805) {
    $r[4] = round($r[4]*805/$r[3]);
    $r[3] = 805;
  }
  return <<< TXT
<img src="../Documents/medies/$r[2]" alt="Image:$r[2]" width="$r[3]" height="$r[4]" longdesc="/index.php/Image:$r[2]" />
TXT;
}
echo $r;