获取页面中指定内容的php类2014-08-29功能:1.获取内容中的url,email,image。2.替换内容中的url,email,image。url:<a href="url">xxx</a>email:admin@admin.comimage:<img src="image">Grep.class.php
<?php/** grep class * Date: 2013-06-15 * Author: fdipzone * Ver:1.0 * * Func: * * set:设置内容 * get:返回指定的内容 * replace:返回替换后的内容 * get_pattern 根据type返回pattern */class Grep{ // class startprivate $_pattern = array("url" => "/<a.*?href="((http(s)?://).*?)".*?/si","email" => "/([w-.]+@[w-.]+(.w+))/","image" => "/<img.*?src="(http://.+.(jpg|jpeg|gif|bmp|png))">/i");private $_content = ""; // 源内容/* 設置搜尋的內容 *@param String $content */public function set($content=""){$this->_content = $content;}/* 获取指定内容 *@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); // 获取patternpreg_match_all($pattern, $this->_content, $matches);return isset($matches[1])? ( $unique==0? $matches[1] : array_unique($matches[1]) ) : array();}/* 获取替换后的内容 *@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);}/* 根据type获取pattern *@param String $type *@return String */private function get_pattern($type){return $this->_pattern[$type];}} // class end?>Demo
<?phpheader("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]" : "";}?>