php函数

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/** * 正则应用:匹配字符串中第一张图片 * preg_match_all(正则规则,要匹配检索的对象,存储匹配结果的数组) * array_slice(数组,开始位置,返回的长度) */function getImg($data,$num=1){$pattern = "/<img.*?src=[\'|\"](.+?)[\'|\"].*?>/si";preg_match_all($pattern,  stripslashes($data),$match);if(!empty($match) && !empty($match[1])){return $num == 1?$match[1][0]:array_slice($match[1],0,$num);}else{return $num == 1?'http://www.baidu.com/uploads/defaultpic.jpg':'';}}/** *正则应用:匹配字符串中的所有图片 *@param type $content 内容 */function getImgs($content, $order = 'ALL') {$pattern = "/<img.*?src=[\'|\"](.+?)[\'|\"].*?>/si";preg_match_all ( $pattern, $content, $match );if (isset($match[1]) && !empty($match[1])) {if ($order === 'ALL'){return $match[1];}if (is_numeric($order) && isset($match[1][$order])) {return $match[1][$order];}}return '';}/** * 去除文章中图片的宽高,让其自适应 * @parram $content 含有图片的字符串 * @parram $s 要搜索的模式 * @parram $r 用于替换的字符串或字符串数组 */function get_replace($content){$s = array('/(<img.*?)(width=\".*?\")(.*?>)/is','/(<img.*?)(height=\".*?\")(.*?>)/is','/(<img.*?)(style=\".*?\")(.*?>)/is');$r = array('\1\3','\1\3','\1\3');$str = preg_replace($s, $r, $content);return $str;}/** *使用CURL抓取页面，代替file_get_contents *@param type $url 地址 */function get_tao_img($url){$ch = curl_init();//特殊情况  CURLOPT_ENCODING => 'gzip'如果目标网站启用了gzip，则在客户端自动解压curl_setopt($ch, CURLOPT_URL, $url);//curl_setopt($ch, CURLOPT_HEADER, TRUE);    //表示需要response headercurl_setopt($ch, CURLOPT_NOBODY, FALSE); //表示需要response bodycurl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);curl_setopt($ch, CURLOPT_FOLLOWLOCATION, FALSE);curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);curl_setopt($ch, CURLOPT_TIMEOUT, 30);$result = curl_exec($ch);$httpCode = curl_getinfo($ch,CURLINFO_HTTP_CODE);if($httpCode==200){echo '请求成功';}elseif($httpCode==404){echo '请求地址为404页面';}else{echo "其他错误".$httpCode;}return $result;}
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