php 获取文章内容的第一张图片实例

function getpic($str_img){
    preg_match_all("/<img.*>/isU",$str,$ereg);//正则表达式把图片的整个都获取出来了
    $img=$ereg[0][0];//图片
    $p="#src=('|")(.*)('|")#isU";//正则表达式
    preg_match_all ($p, $img, $img1);
    $img_path =$img1[2][0];//获取第一张图片路径 
    return $img_path;
    }
//假如数据库已打开，用$nr获取数据库中的新闻内容
$nr=$row_news["nr"];
$aa=getpic($nr_a);
if(!$aa){$aa="images/nopic.jpg";} //如果新闻中不存在图片，用默认的nopic.jpg替换

$obj=M("News");
$info=$obj->where('id=1')->find();
//方法1*********

            $soContent = $info['content'];
            $soImages = '~<img [^>]* />~';
            preg_match_all( $soImages, $soContent, $thePics );
            $allPics = count($thePics[0]);
            preg_match('/<img.+src="?(.+.(jpg|gif|bmp|bnp|png))"?.+>/i',$thePics[0][0],$match);
            dump($thePics);
            if( $allPics> 0 ){
                echo "<img src='".$match[1]."' title='".$match[1]."'>";//获取的图片名称
            }
            else {
                echo "没有图片";
            }

//**************

            $soContent = $info['content'];
            $soImages = '~<img [^>]* />~';
            preg_match_all( $soImages, $soContent, $thePics );
            $allPics = count($thePics[0]);
            dump($thePics);
            if( $allPics> 0 ){
                echo $thePics[0][0]; //获取的整个Img属性
            } else {
                echo "没有图片";
            }

//**************

            $soImages = '~<img [^>]* />~';
            $str=$info['content'];
            preg_match_all($soImages,$str,$ereg);//正则表达式把图片的整个都获取出来了
            $img=$ereg[0][0];//图片
            $p="#src=('|")(.*)('|")#isU";//正则表达式
            preg_match_all ($p, $img, $img1);
               $img_path =$img1[2][0];//获取第一张图片路径
            if(!$img_path){
                $img_path="images/nopic.jpg";
            } //如果新闻中不存在图片，用默认的nopic.jpg替换 */
            echo $img_path;

//*************88

            $str=$info['content'];
            preg_match_all("/<img.*>/isU",$str,$ereg);//正则表达式把图片的整个都获取出来了
            $img=$ereg[0][0];//图片
            $p="#src=('|")(.*)('|")#isU";//正则表达式
            preg_match_all ($p, $img, $img1);
               $img_path =$img1[2][0];//获取第一张图片路径
            if(!$img_path){
                $img_path="images/nopic.jpg";
            } //如果新闻中不存在图片，用默认的nopic.jpg替换 */
            echo $img_path;

<?php
//define your token
define("TOKEN", "chenxiang");//改成自己的TOKEN
define('APP_ID', '');//改成自己的APPID
define('APP_SECRET', '');//改成自己的APPSECRET

$wechatObj = new wechatCallbackapiTest(APP_ID,APP_SECRET);
$wechatObj->Run();

class wechatCallbackapiTest
{
    private $fromUsername;
    private $toUsername;
    private $times;
    private $keyword;
    private $app_id;
    private $app_secret;
   
   
    public function __construct($appid,$appsecret)
    {
        # code...
        $this->app_id = $appid;
        $this->app_secret = $appsecret;
    }

    public function valid()
    {
        $echoStr = $_GET["echostr"];
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }

    /**
     * 运行程序
     * @param string $value [description]
     */
    public function Run()
    {
        $this->responseMsg();
        $arr[]= "您好，这是自动回复，我现在不在，有事请留言，我会尽快回复你的^_^";
        echo $this->make_xml("text",$arr);
    }

    public function responseMsg()
    {  
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];//返回回复数据
        if (!empty($postStr)){
                $access_token = $this->get_access_token();//获取access_token
                $this->createmenu($access_token);//创建菜单
                //$this->delmenu($access_token);//删除菜单
                $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $this->fromUsername = $postObj->FromUserName;//发送消息方ID
                $this->toUsername = $postObj->ToUserName;//接收消息方ID
                $this->keyword = trim($postObj->Content);//用户发送的消息
                $this->times = time();//发送时间
                $MsgType = $postObj->MsgType;//消息类型
                if($MsgType=='event'){
                    $MsgEvent = $postObj->Event;//获取事件类型
                    if ($MsgEvent=='subscribe') {//订阅事件
                        $arr[] = "你好，我是xxx，现在我们是好友咯![愉快][玫瑰]";
                        echo $this->make_xml("text",$arr);
                        exit;
                    }elseif ($MsgEvent=='CLICK') {//点击事件
                        $EventKey = $postObj->EventKey;//菜单的自定义的key值，可以根据此值判断用户点击了什么内容，从而推送不同信息
                        $arr[] = $EventKey;
                        echo $this->make_xml("text",$arr);
                        exit;
                    }
                }
        }else {
            echo "this a file for weixin API!";
            exit;
        }
    }

    /**
     * 获取access_token
     */

    private function get_access_token()
    {
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->app_id."&secret=".$this->app_secret;
        $data = json_decode(file_get_contents($url),true);
        if($data['access_token']){
            return $data['access_token'];
        }else{

            return "获取access_token错误";
        }
    }

    /**
     * 创建菜单
     * @param $access_token 已获取的ACCESS_TOKEN
     */
    public function createmenu($access_token)
    {
        $url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=".$access_token;
        $arr = array(
            'button' =>array(
                array(
                    'name'=>urlencode("生活查询"),
                    'sub_button'=>array(
                        array(
                            'name'=>urlencode("天气查询"),
                            'type'=>'click',
                            'key'=>'VCX_WEATHER'
                        ),
                        array(
                            'name'=>urlencode("身份证查询"),
                            'type'=>'click',
                            'key'=>'VCX_IDENT'
                        )
                    )
                ),
                array(
                    'name'=>urlencode("轻松娱乐"),
                    'sub_button'=>array(
                        array(
                            'name'=>urlencode("刮刮乐"),
                            'type'=>'click',
                            'key'=>'VCX_GUAHAPPY'
                        ),
                        array(
                            'name'=>urlencode("幸运大转盘"),
                            'type'=>'click',
                            'key'=>'VCX_LUCKPAN'
                        )
                    )
                ),
                array(
                    'name'=>urlencode("我的信息"),
                    'sub_button'=>array(
                        array(
                            'name'=>urlencode("关于我"),
                            'type'=>'click',
                            'key'=>'VCX_ABOUTME'
                        ),
                        array(
                            'name'=>urlencode("工作信息"),
                            'type'=>'click',
                            'key'=>'VCX_JOBINFORMATION'
                        )
                    )
                )
            )
        );
        $jsondata = urldecode(json_encode($arr));
        $ch = curl_init();
        curl_setopt($ch,CURLOPT_URL,$url);
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch,CURLOPT_POST,1);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$jsondata);
        curl_exec($ch);
        curl_close($ch);

    }

    /**
     * 查询菜单
     * @param $access_token 已获取的ACCESS_TOKEN
     */
   
    private function getmenu($access_token)
    {
        # code...
        $url = "https://api.weixin.qq.com/cgi-bin/menu/get?access_token=".$access_token;
        $data = file_get_contents($url);
        return $data;
    }

    /**
     * 删除菜单
     * @param $access_token 已获取的ACCESS_TOKEN
     */
   
    private function delmenu($access_token)
    {
        # code...
        $url = "https://api.weixin.qq.com/cgi-bin/menu/delete?access_token=".$access_token;
        $data = json_decode(file_get_contents($url),true);
        if ($data['errcode']==0) {
            # code...
            return true;
        }else{
            return false;
        }

    }
       
    /**
     *@param type: text 文本类型, news 图文类型
     *@param value_arr array(内容),array(ID)
     *@param o_arr array(array(标题,介绍,图片,超链接),...小于10条),array(条数,ID)
     */
   
    private function make_xml($type,$value_arr,$o_arr=array(0)){
        //=================xml header============
        $con="<xml>
                    <ToUserName><![CDATA[{$this->fromUsername}]]></ToUserName>
                    <FromUserName><![CDATA[{$this->toUsername}]]></FromUserName>
                    <CreateTime>{$this->times}</CreateTime>
                    <MsgType><![CDATA[{$type}]]></MsgType>";
                   
          //=================type content============
        switch($type){
         
            case "text" :
                $con.="<Content><![CDATA[{$value_arr[0]}]]></Content>
                    <FuncFlag>{$o_arr}</FuncFlag>"; 
            break;
           
            case "news" :
                $con.="<ArticleCount>{$o_arr[0]}</ArticleCount>
                     <Articles>";
                foreach($value_arr as $id=>$v){
                    if($id>=$o_arr[0]) break; else null; //判断数组数不超过设置数
                    $con.="<item>
                         <Title><![CDATA[{$v[0]}]]></Title>
                         <Description><![CDATA[{$v[1]}]]></Description>
                         <PicUrl><![CDATA[{$v[2]}]]></PicUrl>
                         <Url><![CDATA[{$v[3]}]]></Url>
                         </item>";
                }
                $con.="</Articles>
                     <FuncFlag>{$o_arr[1]}</FuncFlag>"; 
            break;
           
        } //end switch
         
         //=================end return============
        $con.="</xml>";
        
        return $con;
    }

    private function checkSignature()
    {
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];   
               
        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
       
        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
}

?>

/**
*对内容中的关键词添加链接
*只处理第一次出现的关键词，对已有链接的关键不会再加链接，支持中英文
*$content:string 原字符串
*$keyword:string  关键词
*$link:string,链接
*/
function yang_keyword_link($content,$keyword,$link){
    //排除图片中的关键词
    $content = preg_replace( '|(<img[^>]*?)('.$keyword.')([^>]*?>)|U', '$1%&&&&&%$3', $content);
    $regEx = '/(?!((<.*?)|(<a.*?)))('.$keyword.')(?!(([^<>]*?)>)|([^>]*?</a>))/si';
    $url='<a href="'.$link.'">'.$keyword.'</a>';
    $content = preg_replace($regEx,$url,$content,1);
    //还原图片中的关键词
    $content=str_replace('%&&&&&%',$keyword,$content);
    return $content;
}

include_once(dirname(__file__)."/../db/DBViewSpot.php" );

class InnerLink{
    private static $spotUrlMap;
    /**
     * Generate view spots keywords link
     *
     * @param string $description
     * @param array $spotUrlMap
     * @return string
     */
    public static function genSpotLink($basePath, $description)
    {
        if(empty(InnerLink::$spotUrlMap)){
            InnerLink::$spotUrlMap = DBViewSpot::getSpotPare();
        }
        // 排除不规则数据
        if ( empty($description)) {
            return $description;
        }
        foreach (InnerLink::$spotUrlMap AS $spotUrlPair){
            $replace = "<a target='_blank' href='http://pzg412403.blog.163.com/blog/".$basePath."/".$spotUrlPair[1].".html'>".$spotUrlPair[0]."</a>";
            // 描述里面只有文字，没有图片，所以只要注意 a 链接
            $tmp1 = explode("<a",$description);
            $is_replaced=false;
            foreach ($tmp1 as $key=>$item){
                $tmp2 = explode("</a>",$item);
                if (sizeof($tmp2)>1) {
                    if (substr($tmp2[0],0,1)!="a" && substr($tmp2[0],0,1)!="A"){
                        if ($is_replaced===false) {
                            $tmp2[1] = InnerLink::str_replace_once($spotUrlPair[0],$replace,$tmp2[1],$is_replaced);
                        }
                        $tmp1[$key] = implode("</a>",$tmp2);
                    }
                }else {
                    if (is_string($item) && $is_replaced===false) {
                        $tmp1[$key] = InnerLink::str_replace_once($spotUrlPair[0],$replace,$item,$is_replaced);
                    }
                }
            }
            $description = implode("<a",$tmp1);
        }
        return $description;
    }
    /**
     * replace key word for one time
     *
     * @param string $needle
     * @param string $replace
     * @param string $haystack
     * @param bool $is_replaced
     * @return string
     */
    private static function str_replace_once($needle, $replace, $haystack,&$is_replaced) {
        $pos = strpos($haystack, $needle);
        if ($pos === false) {
            return $haystack;
        }
        $is_replaced=true;
        return substr_replace($haystack, $replace, $pos, strlen($needle));
    }
}

<?php

function get_qq_status($uin)
{
 error_reporting(0);
 $f=file_get_contents('http://wpa.qq.com/pa?p=1:'.$uin.':4');
 if(!$f) return(true);
 foreach($http_response_header as $val)
 {
  if(strpos($val,'Content-Length')!==false)
  {
   return(intval(substr($val,16,50))>1000);
  }
 }
}

?>

<?
function tphp_qq_online( $uin )
{
    $reques  = "GET /pa?p=1:".$uin.":1 HTTP/1.1rn";
    $reques .= "Host: wpa.qq.comrn";
    $reques .= "User-Agent: PHP_QQ_SPYrnrn";
 
    if ( !( $socket = socket_create( AF_INET, SOCK_STREAM, SOL_TCP ) ) ) return(-1);
    if ( !( socket_connect( $socket, "wpa.qq.com", 80 ) ) ) return(-1);
    if ( !( socket_write( $socket, $reques ) ) ) return(-1);
    if ( !( $respon = socket_read( $socket, 1024, PHP_BINARY_READ ) ) ) return(-1);;
    socket_close( $socket );
    
    $field = explode( "rn", $respon ); 
    for ( $i=0; $i<count($field); $i++ ) {
        if ( strncasecmp($field[$i], "Location:", 9) == 0 ) {
            if ( strpos( $field[$i], "online") ) {
                $ret = 1;
            } else if ( strpos( $field[$i], "offline") ) {
                $ret = 0;
            } else { 
                $ret = -1;
            } // if
            break;
        } // if
    } // for
    
    return( $ret );
}
/* }}} */
 
 

echo tphp_qq_online( 561272831 );

?>

//获取QQ状态
function getQQState($qq){
    $url ='http://wpa.qq.com/pa?p=2:'.$qq.':41&r=' . time ();
 $headInfo = get_headers($url,1);
 $length = $headInfo['Content-Length'];
 if ($length==1243) {
  return true;
 }else {
  return false;
 }
}
//获取QQ昵称
function getQQNick($qq){
 $str = file_get_contents('http://r.qzone.qq.com/cgi-bin/user/cgi_personal_card?uin='.$qq);
 $pattern = '/'.preg_quote('"nickname":"','/').'(.*?)'.preg_quote('",','/').'/i';
 preg_match ( $pattern,$str, $result );
 return $result[1];
}
//获取QQ姓名
function getQQName($qq){
 //$qqArr = include 'friendArr.php';//预先设置的
 //$username = $qqArr[$qq];
 if (!$username) {
  $username = getQQNick($qq);
 }
 return $username;
}

$curl = curl_init();
$cookie_jar = tempnam('./tmp','cookie');
curl_setopt($curl, CURLOPT_URL,'http://www.111cn.net/  checkUser.jsp');//这里写上处理登录的界面
curl_setopt($curl, CURLOPT_POST, 1);
$request = 'user=xxx&password=xxx';
curl_setopt($curl, CURLOPT_POSTFIELDS, $request);//传 递数据
curl_setopt($curl, CURLOPT_COOKIEJAR, $cookie_jar);// 把返回来的cookie信息保存在$cookie_jar文件中
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);//设定返回 的数据是否自动显示
curl_setopt($curl, CURLOPT_HEADER, false);//设定是否显示头信 息
curl_setopt($curl, CURLOPT_NOBODY, false);//设定是否输出页面 内容
curl_exec($curl);//返回结果
curl_close($curl); //关闭

$curl2 = curl_init();
curl_setopt($curl2, CURLOPT_URL, 'http://www.111cn.net/ aaa.php');//登陆后要从哪个页面获取信息
curl_setopt($curl2, CURLOPT_HEADER, false);
curl_setopt($curl2, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl2, CURLOPT_COOKIEFILE, $cookie_jar);
$content = curl_exec($curl2);

$content = strstr($orders,'<div class="products">');//查找首次出现

<div class="products">