新手求一个简单的正则表达式，大大们帮帮忙.谢谢

本帖最后由 bupabupa166 于 2014-10-31 22:08:43 编辑

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<?php
$str='<a title="women bags" data-text="women bags" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=women+bags&_frs=1">women bags</a> <a title="backpack" data-text="backpack" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=backpack&_frs=1">backpack</a> <a title="wallet" data-text="wallet" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=wallet&_frs=1">wallet</a> <a title="bag men" data-text="bag men" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=bag+men&_frs=1">bag men</a> <a title="keysool bag" data-text="keysool bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=keysool+bag&_frs=1">keysool bag</a> <a title="dress" data-text="dress" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=dress&_frs=1">dress</a> <a title="handbag" data-text="handbag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=handbag&_frs=1">handbag</a> <a title="shoulder bag" data-text="shoulder bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=shoulder+bag&_frs=1">shoulder bag</a> <a title="purse" data-text="purse" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=purse&_frs=1">purse</a> <a title="shoes" data-text="shoes" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=shoes&_frs=1">shoes</a> <a title="bag man" data-text="bag man" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=bag+man&_frs=1">bag man</a> <a title="leather bag" data-text="leather bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=leather+bag&_frs=1">leather bag</a>';preg_match_all('/data-text="(.+)"/U',$str,$matches,PREG_PATTERN_ORDER );var_dump($matches[1]);array(12) {
 [0]=>
 string(10) "women bags"
 [1]=>
 string(8) "backpack"
 [2]=>
 string(6) "wallet"
 [3]=>
 string(7) "bag men"
 [4]=>
 string(11) "keysool bag"
 [5]=>
 string(5) "dress"
 [6]=>
 string(7) "handbag"
 [7]=>
 string(12) "shoulder bag"
 [8]=>
 string(5) "purse"
 [9]=>
 string(5) "shoes"
 [10]=>
 string(7) "bag man"
 [11]=>
 string(11) "leather bag"
}
$str = '<a title="women bags" data-text="women bags" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=women+bags&_frs=1">women bags</a> <a title="backpack" data-text="backpack" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=backpack&_frs=1">backpack</a> <a title="wallet" data-text="wallet" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=wallet&_frs=1">wallet</a> <a title="bag men" data-text="bag men" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=bag+men&_frs=1">bag men</a> <a title="keysool bag" data-text="keysool bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=keysool+bag&_frs=1">keysool bag</a> <a title="dress" data-text="dress" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=dress&_frs=1">dress</a> <a title="handbag" data-text="handbag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=handbag&_frs=1">handbag</a> <a title="shoulder bag" data-text="shoulder bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=shoulder+bag&_frs=1">shoulder bag</a> <a title="purse" data-text="purse" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=purse&_frs=1">purse</a> <a title="shoes" data-text="shoes" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=shoes&_frs=1">shoes</a> <a title="bag man" data-text="bag man" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=bag+man&_frs=1">bag man</a> <a title="leather bag" data-text="leather bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=leather+bag&_frs=1">leather bag</a>';
preg_match_all("/data-text=(\".+\")/U",$str,$match);
echo "<pre>";
print_r($match);
$str = '<a title="women bags" data-text="women bags" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=women+bags&_frs=1">women bags</a> <a title="backpack" data-text="backpack" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=backpack&_frs=1">backpack</a> <a title="wallet" data-text="wallet" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=wallet&_frs=1">wallet</a> <a title="bag men" data-text="bag men" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=bag+men&_frs=1">bag men</a> <a title="keysool bag" data-text="keysool bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=keysool+bag&_frs=1">keysool bag</a> <a title="dress" data-text="dress" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=dress&_frs=1">dress</a> <a title="handbag" data-text="handbag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=handbag&_frs=1">handbag</a> <a title="shoulder bag" data-text="shoulder bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=shoulder+bag&_frs=1">shoulder bag</a> <a title="purse" data-text="purse" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=purse&_frs=1">purse</a> <a title="shoes" data-text="shoes" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=shoes&_frs=1">shoes</a> <a title="bag man" data-text="bag man" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=bag+man&_frs=1">bag man</a> <a title="leather bag" data-text="leather bag" href="http://www.xxx.com/keys/i.html?_sacat=0&_nkw=leather+bag&_frs=1">leather bag</a>';preg_match_all('/data-text="(.*?)"/is', $str, $matches);print_r($matches[1]);Array
(
 [0] => women bags
 [1] => backpack
 [2] => wallet
 [3] => bag men
 [4] => keysool bag
 [5] => dress
 [6] => handbag
 [7] => shoulder bag
 [8] => purse
 [9] => shoes
 [10] => bag man
 [11] => leather bag
)
写了一个比较直观的，先提权单链接，然后在单链接中提取data-text="...."引号中的信息//先匹配超链接的前半部分，比如<a href="......" >这一部分
function filterLink($data)
{
$pat='#<a[^>]+?>#ui';
if(preg_match_all($pat, $data, $match))
{
foreach($match[0] as $link)
{
//echo $link." ";
filterData($link);
}
}
else
{
echo '匹配失败';
}
}//然后在单个的<a data-text="..." href="..."> 中提取需要的信息
function filterData($data)
{
$pat='#data-text="([^"]+?)"#i';
if(preg_match_all($pat, $data, $match))
{
foreach($match[1] as $content)
{
echo $content." ";
}
}
else
{
echo '匹配失败';
}
}
filterLink($str);