我找遍了，似乎找不到正确的答案。我想替换所有的链接在一个给定的HTML字符串，像这样:
... <a href="link.php">Description Here</a> ...
to:
Description Here: link.php
这是为了使非html电子邮件客户端可以看到链接，并有能力复制和粘贴到他们的浏览器。
你可以这样做:
$text = '<a href="link.php">Description Here</a>';
$replaced = preg_replace('/<a [^>]*href="(.*)"[^>]*>(.*)<'/a>/', '$2: $1', $text);
PCRE save you:
$text = '<a href="link.php">Description Here</a>';
echo preg_replace("/'<a.*href='"(.*)'".*'>(.*)'<'/a'>/Usi",'$2: $1',$text);
echo preg_replace("/<a.*?href='"(.*?)'".*?>(.*?)<'/a>/i", "$2: $1", $html);
在纯php中，从通用html文件中可以:
<?php
//an example html string
$dataStr = '<ul id="sub-menu">
<li class="parent item10"><a href="link1.php">Arts</a>
<ul>
<li class="item29">
<a href="link2.php">Arts Show</a></li>
<li class="item29">
<a href="link3.php">Another Arts Show</a></li>
</ul>
</li>
<li class="parent item15"><a href="link6.php">News</a>
<ul>
<li class="item18">
<a href="link7.php">News Show</a></li>
</ul>
</li>
</ul>';
$startIndex = strpos($dataStr, "<a", 0);
$endIndex = strpos($dataStr, "</a", $startIndex);
while (1==1){
if($startIndex == false || $endIndex == false){
break;
}
$currentLine = substr($dataStr,$startIndex,($endIndex-$startIndex)+4);
$linkStartIndex = strpos($currentLine, "href=", 0)+6;
$linkEndIndex = strpos($currentLine, '"', $linkStartIndex);
$currentLink = substr($currentLine,$linkStartIndex,$linkEndIndex-$linkStartIndex);
$descriptionStartIndex = strpos($currentLine, ">", $linkEndIndex)+1;
$descriptionEndIndex = strpos($currentLine, "<", $descriptionStartIndex);
$currentDescription = substr($currentLine,$descriptionStartIndex,$descriptionEndIndex-$descriptionStartIndex);
echo ($currentDescription.": ".$currentLink."'n");
$startIndex = strpos($dataStr, "<a", $endIndex+5);
$endIndex = strpos($dataStr, "</a", $startIndex);
}
?>