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php curl 发送post请求 

Jun 23, 2016 pm 01:16 PM


在很多任务中我们可能需要发送post请求,但是又不需要或者不想用界面表单的方式,这时就可以使用php中的curl 来模拟表单的提交


首先封装一个curl 方法

private function curlExec($options) {		$ch = curl_init ();				curl_setopt_array ( $ch, $options );		// 返回json string		$result = curl_exec ( $ch );		// 检查是否有错误发生		if (curl_errno ( $ch )) {			$error = "curl exec error! " . curl_error ( $ch );			$result = array ( "code" => "1005", "info" => $error );		}		curl_close ( $ch );		return $result;	}
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然后就就是对参数设置的问题, 官方文档刚开始有点不理解,现在详细说明一下:

就curl_setopt()来说,传递一个数组到CURLOPT_POST将会把数据以multipart/form-data的方式编码,然而传递一个URL-encoded字符串将会以application/x-www-form-urlencoded的方式对数据进行编码。


首先是传递进去$post为array, 而且配置中没有使用CURLOPT_POST

CURLOPT_POST=1
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这个参数是将 multipart/form-data 类型转换为 application/x-www-form-urlencoded 格式,

如下面的例子传递post请求是以  multipart/form-data 格式:

$post = array ('imagefile' => '@' . $uploadFilePath, 'configfile' => $data );	$url = $this->cfg['baseUrl'].'/upload';		$options = array (    CURLOPT_URL => $url,    CURLOPT_POSTFIELDS => $post,    CURLOPT_HEADER => 0,    CURLOPT_RETURNTRANSFER => 1,    CURLOPT_TIMEOUT => 28,    CURLOPT_CONNECTTIMEOUT => $this::MAX_CONNECTION_TIME);
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下面说URL-encoded 方式,其实就是将参数已字符串拼接的方式进行传递.

如果传递post请求是以 application/x-www-form-urlencoded  , 就需要先将参数 用字符串拼接,不能使用数组.

不放心的情况下可是设置 CURLOPT_POST=1 这个要设置在 CURLOPT_POSTFIELDS= $post 下面,

保证 CONTENT_TYPE 始终为 application/x-www-form-urlencoded .

例子如下:

$post = 'ids=123&name=aa';$url = 'http://localhost/Test/test.php';		$options = array (    CURLOPT_URL => $url,				    CURLOPT_HEADER => 0,    CURLOPT_RETURNTRANSFER => 1,					    CURLOPT_POSTFIELDS => $post,    CURLOPT_POST=> 1,    CURLOPT_TIMEOUT => 28,    CURLOPT_CONNECTTIMEOUT => $this::MAX_CONNECTION_TIME,				);
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还有一种解决方式就是自己写head头部信息,

$options = array (    ...    CURLOPT_HTTPHEADER= array('Content-Type: application/x-www-form-urlencoded'),);
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如果需要其他Head可以自己添加.

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