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php 中使用cURL发送get/post请求,上传图片,批处理

Jun 08, 2016 am 08:49 AM
curl get php post upload use send ask

cURL是利用url语法规定传输文件和数据的工具。php中有curl拓展,一般用来实现网络抓取,模拟发送get post请求,文件上传。 在php中建立curl的基本步骤如下: 1 初始化 2 设置选项,包括url 3 执行并获取结果 4 释放curl句柄。 在工作和学习中,我也是时常用

  cURL是利用url语法规定传输文件和数据的工具。php中有curl拓展,一般用来实现网络抓取,模拟发送get   post请求,文件上传。

  在php中建立curl的基本步骤如下:

  1 初始化        2 设置选项,包括url        3  执行并获取结果     4 释放curl句柄。

  在工作和学习中,我也是时常用的curl。由于在使用curl设置选项时,各种选项比较难以记忆,需要参考,故在此记录下常用的一些例子,以便后来参考。

实例一 : 抓取网页数据(以拉手网开放api为例,也是get请求)

<?php header("Content-type: text/html; charset=utf-8");  
$ch = curl_init();//初始化

/*============开始设置curl各种选项================*/
curl_setopt($ch, CURLOPT_URL, "http://open.lashou.com/opendeals/lashou/city.xml");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);


$html = curl_exec($ch);//执行句柄,获取返回内容

curl_close($ch);//释放句柄

echo $html
?>
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  如果用这种方法发get请求,参数附加到url后面即可

     如curl_setopt($ch, CURLOPT_URL, "http://localhost/tqj/date/p822.php?name=yyyyy");

实例 2  利用curl发送post请求

<?php $uri = "http://localhost/tqj/date/p822.php";

// post参数数组
$data = array (
        'name' => 'tianquanjun', 
 		'password' => 'tianquanjun',
);

//初始化 
$ch = curl_init ();

//各种项设置,网上参考而来,可以查看php手册,自己设置
curl_setopt ( $ch, CURLOPT_URL, $uri );
curl_setopt ( $ch, CURLOPT_POST, 1 );//post方式
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );

//执行
$return = curl_exec ( $ch );
//释放
curl_close ( $ch );
 
print_r($return);
?>
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实例三  :curl 过程调试与错误信息处理

<?php $uri = "http://localhost/tqj/date/p822.php";

// post参数数组
$data = array (
        'name' => 'tianquanjun', 
 		'password' => 'tianquanjun',
);

//初始化 
$ch = curl_init ();

//各种项设置,网上参考而来,可以查看php手册,自己设置
curl_setopt ( $ch, CURLOPT_URL, $uri );
curl_setopt ( $ch, CURLOPT_POST, 1 );//post方式
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );

//执行
$return = curl_exec ( $ch );

<span>//容错机制
if($return === false){
	var_dump(curl_error($ch));
	}

//curl_getinfo()获取各种运行中信息,便于调试	
$info = curl_getinfo($ch);

echo "执行时间".$info['total_time'].PHP_EOL;</span>

//释放
curl_close ( $ch );
 
print_r($return);
?>
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  其中利用curl_error()获取错误信息,curl_getinfo()获取运行相关信息。

 

实例四  上传图片,获取返回信息。跨域上传图片,同时获取返回信息,这个就能大显身手。和post比较像,注意文件之前加一个@符号

<?php $uri = "http://localhost/tqj/date/p822.php";

// post参数数组
$data = array (
        'author' => 'tianquanjun', 
 		'upload' => '@C:\Users\tianquanjun.DANGDANG\Pictures\a.jpg',
);

//初始化 
$ch = curl_init ();

//各种项设置,网上参考而来,可以查看php手册,自己设置
curl_setopt ( $ch, CURLOPT_URL, $uri );
curl_setopt ( $ch, CURLOPT_POST, 1 );//post方式
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );

//执行
$return = curl_exec ( $ch );

//容错机制
if($return === false){
	var_dump(curl_error($ch));
	}

//curl_getinfo()获取各种运行中信息,便于调试	
$info = curl_getinfo($ch);

echo "执行时间".$info['total_time'].PHP_EOL;

//释放
curl_close ( $ch );
 
print_r($return);
?>
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实例五 : curl批处理。

  curl有一个高级特性,批处理句柄。允许打开多个curl链接。 

  批处理就是打开多个curl句柄,并把这些句柄指派给一个批处理句柄,然后在while循环里等待处理完毕。curl_multi_exec()算是称得上多线程处理,不过它还是属于异步的范畴。

 

<?php header("Content-type: text/html; charset=gbk"); 
$urls=array('http://www.baidu.com','http://www.qq.com/');
$ch=array();
//批处理句柄
$mh=curl_multi_init();

//打开多个curl句柄,并指派给一个批处理句柄
$ch[0]=curl_init($urls[0]);
$ch[1]=curl_init($urls[1]);
for($i=0;$i<2;$i++)
{
curl_setopt($ch[$i],CURLOPT_RETURNTRANSFER,1);
curl_multi_add_handle($mh,$ch[$i]);
 
}
$running = NULL;
do{
    usleep(10000);
    curl_multi_exec($mh,$running);//实现批处理,可以看做curl多线程,实际是异步范畴
}while($running>0);
$res=array();
for($j=0;$j
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  基本算是列举了常用的一些实例。要想灵活运用curl,还是得熟悉curl的各个设置项,这些设置项才是curl的灵魂。

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