curl 拼装参数post数据

<?php //查询余额
$post_data = array(
'userid' => ,
'password' => '',
'account' => '',
);

$url='http://xtx.telhk.cn:8080/sms.aspx';

$data='';

foreach ($post_data as $k=>$v)
{
$data.="$k=".urlencode($v).'&';
}
$post_data=substr($data,0,-1);

$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);

print_r($result);

</pre><pre code_snippet_id="1629148" snippet_file_name="blog_20160330_1_9539448" name="code" class="php">

$ch = curl_init ();
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_POST, 1 );
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data );
$return = curl_exec ( $ch );
curl_close ( $ch );