PHP curl_setopt函数用法介绍中篇

此篇已实例为主。

​一.一般的实例​

demo1.php

<?php
    $user = "admin123";
    $pass = "admin456";
    // $curlPost = "user=$user&pass=$pass";    ####  测试一
   ######测试二

    $curlPost = array(     
       'a'=>123,
       'b'=>456,
       'c'=>789
        );


    $ch = curl_init(); //初始化一个CURL对象
    curl_setopt($ch, CURLOPT_URL, "demo2.php");
    //设置你所需要抓取的URL
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
    //设置curl参数，要求结果是否输出到屏幕上，为true的时候是不返回到网页中
   // 假设上面的0换成1的话，那么接下来的$data就需要echo一下。
    curl_setopt($ch, CURLOPT_POST, 1);
    //post提交
    curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
    $data = curl_exec($ch);
    // echo $data;
    //运行curl,请求网页。
    curl_close($ch);

?>

查看结果：

<?php
// echo "aaaaa";
echo "<pre>";
var_dump($_POST);
echo "<br/>";
echo $_POST['b'];


echo "<br/>";

$a = array('1'=>1234,'2'=>567);
var_dump($a);

?>

<?php
// 初始化一个 cURL 对象
$curl = curl_init();

// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, 'http://www.baidu.com');

// 设置header
curl_setopt($curl, CURLOPT_HEADER, 1);

// 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

// 运行cURL，请求网页
$data = curl_exec($curl);

// 关闭URL请求
curl_close($curl);

// 显示获得的数据
var_dump($data);
?>

 ​二.采集数据信息​

在实践的项目中，要求采集某网站产品列表的信息。右击网站，查看源码，发现并无产品信息。通过分析该网站，产品信息是通过ajax调用的。

利用跑数据的形式，获取产品信息，分析url地址，得到的json形式的产品数据，通过转换，将产品属性“对坐入号”获取，我采用的是插入到数据库当中。

代码如下：

<?php
header('Content-Type:text/html;charset=UTF-8');

set_time_limit(0);

$id = isset($_GET['id']) ? intval($_GET['id']) : 1;

$listurl = "http://www.ptgcn.com/Handler/PublicationHandler.ashx?r=0.38488502931227453&func=GetDataByPCD&index={$id}&size=20&sort=&dir=asc&param=";
// echo $listurl;
exit;    ####默认结束状态
$ch = curl_init();
// var_dump($ch);
// 2. 设置选项，包括URL
curl_setopt($ch, CURLOPT_URL, $listurl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch,CURLOPT_HTTPHEADER,array ("Content-Type: text/xml; charset=utf-8","Expect: 100-continue"));

// 3. 执行并获取HTML文档内容
$output = curl_exec($ch);


$httpCode = curl_getinfo($ch,CURLINFO_HTTP_CODE);

curl_close($ch);
// var_dump($httpCode);
if($httpCode == '200'){
// echo "123456";
    // var_dump($output);
    $json_b = json_decode($output,true);
    // var_dump($json_b);
    $new = $json_b['rows'];
    // var_dump($new);
    foreach($new as $row){

      $catalog ='';
      $catalog = addslashes(trim($row['CatalogNo']));
      $catalog = "'". $catalog."'";

      $url = '';
      $url = "http://www.ptgcn.com/Products/".trim($row['PermaLink']).".html";
      $catalog_addr = $url;
      $catalog_addr = "'".$catalog_addr."'";

      $pubmed_id ='';
      $pubmed_id = addslashes(trim($row['PMID']));
      $pubmed_id = "'".$pubmed_id."'";

      $author = '';
      $author = addslashes(trim($row['Author']));
      $author = "'".$author."'";

      $journal_a = '';
      $journal_b = '';
      $journal = '';
      $journal_a = addslashes(trim($row['Journal']));
      $journal_b = addslashes(trim($row['PubDate']));
      $journal = $journal_a.",".$journal_b;
      $journal = "'".$journal."'";
      // $journal = addslashes(trim($row['CatalogNo']));
      $application = '';
      $application = addslashes(trim($row['App']));
      $application = "'".$application."'";

      $species = '';
      $species = addslashes(trim($row['Species']));
      $species = "'".$species."'";

      $title = '';
      $title = addslashes(trim($row['Subject']));
      $title = "'".$title."'";

     var_dump($row);
     exit;
      $con = mysql_connect('localhost',"root","root");
      mysql_set_charset("utf8");
      $select = mysql_select_db("wh");

      $sql = '';
      $sql = "insert into ptg(catalog,catalog_addr,pubmed_id,author,journal,application,species,title)values({$catalog},{$catalog_addr},

{$pubmed_id},{$author},{$journal},{$application},{$species},{$title})";
      echo $sql;
      $query_insert = mysql_query($sql);

      if($query_insert){
        echo "success!";
      }else{
       $html = '';
       $html = $html.$catalog."\r\n";
       file_put_contents('error.txt',$html,FILE_APPEND); //用于装载执行失败的数据
      }

      mysql_close($con);
      // var_dump($con,$select);
      // exit;
    }
}else{
    echo 'finished !';
    exit;
}

?>

<script>
function JumpUrl() {
    location.href='?id=<?php echo ($id+1);?>';
}
setTimeout('JumpUrl()',1);
</script>

说到采集再介绍一种方法：

​三.利用phpQuery.采集数据信息​

​  git：​​https://github.com/TobiaszCudnik/phpquery​

1.使用场合，右击某网站，查看源码，如果源码信息与网站本身一样，可以考虑使用phpQuery进行采集

2.phpQuery,顾名思义：及将源码的编译方式转换为jQuery的形式。然后一切调用都使用jQuery风格即可

3.说明：先要引用  include 'phpQuery/phpQuery.php';

如：

简单的三行代码，就可以获取头条内容。首先在程序中包含phpQuery.php核心程序，然后调用读取目标网页，最后输出对应标签下的内容。

pq()是一个功能强大的方法，跟jQuery的$()如出一辙，jQuery的选择器基本上都能使用在phpQuery上，只要把“.”变成 “->”。

如上例中，pq(".blkTop h1:eq(0)")抓取了页面class属性为blkTop的DIV元素，并找到该DIV内部的第一个h1标签，

然后用html()方法获取h1标签里 的内容（带html标签），也就是我们要获取的头条信息，如果使用text()方法，则只获取头条的文本内容。

当然要使用好phpQuery，关键是要找 对文档中对应内容的节点。

4.具体的采集代码如下：

<?php
header('Content-Type:text/html;charset=UTF-8');
include 'phpQuery/phpQuery.php';

set_time_limit(0);

$id = isset($_GET['id']) ? intval($_GET['id']) : 1;


if($id > 14172){
   echo "finish!";
   exit;
}



$con = mysql_connect('localhost',"root","root");
mysql_set_charset("utf8");
$select = mysql_select_db("wh");

$sql = "select catalog_addr from ptg where id = {$id}";
$query = mysql_query($sql);
$row = mysql_fetch_assoc($query);
// var_dump($row);
$url = stripslashes(trim($row['catalog_addr']));
$url = str_replace("html","htm",$url); 
// echo $url;
// exit;


// echo "aaaaa";
// phpQuery::newDocumentFile('http://helloweba.com/blog.html');
####$url,就是单纯的url地址

phpQuery::newDocumentFile($url);
// echo "aaaaa";
// exit;
$artList = pq(".proTitle");

// var_dump($artList);

####  No.1
foreach($artList as $li){
    $one = pq($li)->find('h1')->html();
    $one = strip_tags($one);
    $one = trim($one);
    echo $one.'<br/>';
}

#### No.2

$artList_a = pq("#dvProApp");

foreach($artList_a as $li){
    $two_a = pq($li) -> find('tr td')->eq(1) ->html();

    $two_b = pq($li) -> find('tr td')->eq(1) ->find('a') ->html();

    $two_a = strip_tags($two_a);
    $two_a = trim($two_a);
    // var_dump($two_a);
    // echo '<br/>';
    $two_b = strip_tags($two_b);
    $two_b = trim($two_b);
    // var_dump($two_b);

    // echo '<br/>';

    $two = str_replace($two_b,"",$two_a);

    $two = strip_tags($two);
    $two = str_replace(" ","",$two);
    // $two = str_replace("  ","",$two);
    $two = trim($two);

    echo $two.'<br/>';

    // $two = preg_replace('/<(\/?a.*?)>/si','',$two);
    // echo $two;
    // exit;

}

##### N0.3
$artList_b = pq("#dvProApp");

foreach($artList_b as $li){
  $three = pq($li) -> find('tr')->eq(1)->find('td')->eq(1)->html();
  $three = trim(strip_tags($three));
  echo $three.'<br/>';
}

##### N0.4
$artList_c = pq("#dvProApp");

foreach($artList_c as $li){
  $four = pq($li) -> find('tr')->eq(2)->find('td')->eq(1)->html();
   $four = trim(strip_tags($four));
  echo $four.'<br/>';
}

##### N0.5
$artList_d = pq("#dvProApp");

foreach($artList_d as $li){
  $five = pq($li) -> find('tr')->eq(3)->find('td')->eq(1)->html();
   $five = trim(strip_tags($five));
  echo $five.'<br/>';
}

##### N0.6
$artList_e = pq("#dvProImm");

foreach($artList_e as $li){
  $six = pq($li) -> find('tr')->eq(2)->find('td')->eq(1)->html();
  $six = trim(strip_tags($six));
  echo $six.'<br/>';
}

##### N0.7
$artList_f = pq("#dvProImm");

foreach($artList_f as $li){
  $seven = pq($li) -> find('tr')->eq(2)->find('td')->eq(3)->html();
  $seven = trim(strip_tags($seven));
  echo $seven.'<br/>';
}

##### N0.8
$artList_g = pq("#dvProImm");

foreach($artList_g as $li){
  $ba = pq($li) -> find('tr')->eq(3)->find('td')->eq(1)->html();
  $ba = trim(strip_tags($ba));
  echo $ba.'<br/>';
}

##### N0.9
$artList_h = pq("#dvProImm");

foreach($artList_h as $li){
  $nine = pq($li) -> find('tr')->eq(3)->find('td')->eq(3)->html();
  $nine = trim(strip_tags($nine));
  echo $nine.'<br/>';
}


####执行插入操作
$one = "'".addslashes(trim($one))."'";
$two = "'".addslashes(trim($two))."'";
$three = "'".addslashes(trim($three))."'";
$four = "'".addslashes(trim($four))."'";
$five = "'".addslashes(trim($five))."'";
$six = "'".addslashes(trim($six))."'";
$seven = "'".addslashes(trim($seven))."'";
$ba = "'".addslashes(trim($ba))."'";
$nine = "'".addslashes(trim($nine))."'";


$sql_in = "insert into ptg_page(title,house_app,pub_app,spe_spe,pub_spe,gen_num,gen_id,gene_sym,syn)values({$one},{$two},{$three},{$four},{$five},{$six},{$seven},{$ba},{$nine})";
echo $sql_in.'<br/>';


$query_in = mysql_query($sql_in);

if($query_in){
   echo "success!";
}else{
    $html = '';
    $html = $html.$url."\r\n";
    file_put_contents('error_url.txt',$html,FILE_APPEND); //用于装载执行失败的数据
}

mysql_close($con);

?>

<script>
function JumpUrl(){
    location.href='?id=<?php echo ($id+1);?>';
}
setTimeout('JumpUrl()',1);
</script>

起点在哪,或许选择不了。重要的是,你追求的终点在哪！