php 获取页面中的指定内容类

功能：

1.获取内容中的url，email，image。

2.替换内容中的url，email，image。

url：url">xxx

email：[email protected]

image：image">

Grep.class.php

 '/ '/([\w\-\.]+@[\w\-\.]+(\.\w+))/',
                            'image' => '//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

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]' : '';
}
?>

转载于:https://www.cnblogs.com/fdipzone/archive/2013/06/16/3715110.html