本文為大家下使用php如何獲取頁面中的指定內容，而且以封裝成類，需要的朋友可以參考下本文
功能： 1.獲取內容中的url，email，image。 2.替換內容中的url，email，image。 url：<a href="url">xxx</a> email：[email protected] image：<img src="image"> Grep.class.php 代碼如下: <?php /** grep class * Date: 2013-06-15 * Author: fdipzone * Ver: 1.0 * * Func: * * set: 設置內容 * get: 返回指定的內容 * replace: 返回替換後的內容 * get_pattern 根據type返回pattern */ class Grep{ // class start private $_pattern = array( 'url' => '/<a.*?href="((http(s)?://).*?)".*?/si', 'email' => '/([w-.]+@[w-.]+(.w+))/', 'image' => '/<img.*?src="(http://.+.(jpg|jpeg|gif|bmp|png))">/i' ); private $_content = ''; // 源內容 /* 設置搜尋的內容 * @param String $content */ public function set($content=''){ $this->_content = $content; } /* 獲取指定內容 * @param String $type * @param int $unique 0:all 1:unique * @return Array */ public function get($type='', $unique=0){ $type = strtolower($type); if($this->_content=='' || !in_array($type, array_keys($this->_pattern))){ return array(); } $pattern = $this->get_pattern($type); // 獲取pattern preg_match_all($pattern, $this->_content, $matches); return isset($matches[1])? ( $unique==0? $matches[1] : array_unique($matches[1]) ) : array(); } /* 獲取替換後的內容 * @param String $type * @param String $callback * @return String */ public function replace($type='', $callback=''){ $type = strtolower($type); if($this->_content=='' || !in_array($type, array_keys($this->_pattern)) || $callback==''){ return $this->_content; } $pattern = $this->get_pattern($type); return preg_replace_callback($pattern, $callback, $this->_content); } /* 根據type獲取pattern * @param String $type * @return String */ private function get_pattern($type){ return $this->_pattern[$type]; } } // class end ?> Demo 代碼如下: <?php header('content-type:text/htm;charset=utf8'); require('Grep.class.php'); $content = file_get_contents('http://www.test.com/'); $obj = new Grep(); $obj->set($content); $url = $obj->get('url', 0); $email = $obj->get('email', 1); $image = $obj->get('image', 1); print_r($url); print_r($email); print_r($image); $url_new = $obj->replace('url', 'replace_url'); echo $url_new; function replace_url($matches){ return isset($matches[1])? '[url]'.$matches[1].'[/url]' : ''; } ?>
