很久后又一次接触正则，那种似曾相似的感觉，你是不是也有这样的感觉，这么小CASE的东西，我一定要把他彻底掌握了，于是花时间看手册，于是就明白了，于是下次又是似曾相似……
总写下今天用到的地方：
//demo
$str = '<div class="test">
<div class="wcb"><li>li</li>
<a href="m.vip.com/shoe/47">跑步鞋</a>
<a href="m.vip.com/shoe/48">篮球鞋</a>
</div>
<div class="wcb">tryagin</div>
</div>';
// 先匹配出DIV
preg_match_all('/<div class=\"wcb\">(.*?)<\/div>/i',$str,$matches);
if(!empty($matches))
{
$target_content = $matches[0][0];
}
//第二次匹配出其中的a标记，注意()是返回匹配的内容
preg_match_all('/<a href=\"((?!\/topic\/show).[^<]*)\">(.*?)<\/a>/i',$target_content,$matches_detail);
if(!empty($matches_detail))
{
$href_content = $matches_detail[1];
$detail_content = $matches_detail[2];
}
方法：
/**
* function: 获取主题馆数据
*
* @param string $topic 主题名
* @param string $pattern 正则模式
*
* @return array $data $data['href_content']:链接信息数组；$data['detail_content']：名称信息数组
*/
private function get_topic_data($topic,$pattern1,$pattern2)
{
$data = array();
if( empty($topic) || empty($pattern1) || empty($pattern2))
{
return $data;
}
// 构建主题馆数据
// 获取整体数据
// 获取页面ID
$modpage_id = 0;
$modpages = $this->Modpage_Model->getAllPages();
foreach($modpages as $one_page) {
if ($one_page['department'] == $topic) {
$modpage_id = $one_page['id'];
}
}
// 取信息
$version_data = $this->Modpage_Model->getCurrentPageVersion($modpage_id);
$page_info_raw = $this->Modpage_Model->getVersionData($modpage_id,$version_data['version']);
// 生成数据
foreach ($page_info_raw as $k => $v)
{
//儿童单独处理
if($topic == 'children')
{
if($v['module_id'] == 1 && $v['desc'] == '快速找宝贝')
{
$parse_str = $v['content'];
break;
}
}
else
{
// 去后台副导航数据
if($v['module_id'] == 4)
{
$parse_str = $v['content'];
break;
}
}
}
// 匹配主题馆需要的数据
// 清洗数据
$parse_str = $this -> clearData($parse_str);
preg_match_all($pattern1,$parse_str,$matches);
if(!empty($matches))
{
$target_content = $matches[0][0];
}
// 替换主机名
$target_content = str_replace($this -> website,TOUCH_URL,$target_content);
// 清洗数据
$target_content = $this -> clearData($target_content);
preg_match_all($pattern2,$matches_detail);
if(!empty($matches_detail))
{
$data['href_content'] = $matches_detail[1];
$data['detail_content'] = $matches_detail[2];
}
return $data;
}
/**
* function: 清洗数据（过滤字符串中的换行符、制表符）
*
* @param string $str 初始字符串
*
* @return string $str
*/
private function clearData( $str )
{
if( empty($str) )
{
return '';
}
// 清除换行符
$str = str_replace("\r\n",'',$str);
// 清除换行符
$str = str_replace("\n",$str);
// 清除制表符
$str = str_replace("\t",$str);
$str = trim( $str );
return $str;
}
//测试方法
/**
* 首页入口
*
*/
public function index() {
$data = array();
$result = array();
// 获取主题馆信息
// 主题馆原始数据 array('部门'=>array('类型','正则一','正则二'))
$topic_name_arr = array(
'sports' => array('sport','/<div class=\"spnavdiv\">(.*?)<\/div>/i','/<a target="_blank" href=\"((?!\/topic\/show).[^<]*)\">(.*?)<\/a>/i'),'womenshoes' => array('women','/<div class=\"OB_floatL\">(.*?)<\/div>/i','/<a href=\"((?!\/topic\/show).[^<]*)\" .*?>(.*?)<\/a>/i'),'menshoes' => array('man','/<div class=\"OB_floatL\" .*?>(.*?)<\/div>/i','outdoor' => array('outdoor','/<div class=\"navlidiv\" style=\".*?\">(.*?)<\/div>/i','/<a href=\"((?!\/topic\/show).[^<]*)\" target="_blank" .*?>(.*?)<\/a>/i'),'children' => array('children','/<table class=\"catetable_2\">(.*?)<\/div>/i','/<a href=\"((?!\/topic\/show).[^<]*)\" target="_blank">(.*?)<\/a>/i'),);
// 组织数据
foreach ($topic_name_arr as $type => $pattern) {
$result = $this -> get_topic_data( $type,$pattern[1],$pattern[2] );
$data['data'][$pattern[0]] = $result;
}
$h_data['jspath'] = 'index';
$this->load->view("touch/common/header",$h_data);
$this->load->view("touch/index/index",$data);
$this->load->view("touch/common/footer");
}
<div class="navsubmenu" style="width:280px;left:0"> <span class="arr" style="left:30px;"></span>
<div class="OB_floatL" style="margin-right:30px">
<h5 class="subh5">全部男鞋</h5>
<p><a target="_blank" href="http://m.vip.com/shoe/167"class="hot">休闲鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/165">正装鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/166" class="hot">商务鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/170">凉鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/173">户外鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/172">帆布鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/171">板鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/168" class="hot">男靴</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/351">棉鞋</a></p>
</div>
<div class="OB_floatL" style="margin-right:30px">
<h5 class="subh5">热门品类</h5>
<p><a target="_blank" href="http://m.vip.com/topic/show/8049" class="hot">1月新品</a></p>
<p><a target="_blank" href="http://m.vip.com/search?top_key=%E5%B7%A5%E8%A3%85%E9%9E%8B&new_cat=164" class="hot">工装鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/search?top_key=%E7%89%9B%E6%B4%A5%E9%9E%8B&new_cat=164">牛津鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/168">男靴</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/167-11v1585">伐木鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/search?top_key=%E5%B8%86%E8%88%B9%E9%9E%8B&new_cat=164">帆船鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/166">商务皮鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/shoe/166-16v243">增高鞋</a></p>
<p><a target="_blank" href="http://m.vip.com/search?gender=1&top_key=%E5%86%9B%E8%AD%A6%E9%9D%B4">军警靴</a></p>
</div>
</div>
PS:
preg快速查看地址：http://msdn.microsoft.com/zh-cn/library/ae5bf541(v=vs.80).aspx
参考递归实现：http://zhidao.baidu.com/link?url=WYgzZnK-_kD_ooBmH3iALiPniS054Ympziofk0nX1B6Nywy1cPjGfnhSp3PaQ95qw_rEOG-E_GX3t4YFvtQeja
总结：
（）可以返回匹配到的内容
