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.com image：<img src="image"> Grep.class.php
复制代码 代码如下:
<?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 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pattern preg_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
复制代码 代码如下:
<?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]" : "";
}
?>
