How to replace a tag with php regular expression

How to regularly replace a tags in php: first put all a tags in the web page into an array; then use the regular expression "preg_match_all($reg1,$str,$aarray);" to take out the a tags links and content.

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php Regularly matches the content in the a tag level a tag

.*?<\/a>/";
$aarray;//这个存放的就是正则匹配出来的所有《a》标签数组
preg_match_all($reg1,$str,$aarray);
//拿出《a》标签中的链接和标签内容
$hrefarray;//这个存放的是匹配出来的href的链接地址
$acontent;//存放匹配出来的a标签的内容
$reg2="/href=\"([^\"]+)/";
for($i=0;$i

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