无法使用cURL在php中执行POST请求

Question

I am unable to perform a POST request in php, the following is my code:

 $ch = curl_init();
 $fields = "=var1?var2?var3";
 $url = "http://localhost/Profile.php?";
 curl_setopt($ch, CURLOPT_URL,$url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
 curl_setopt($ch, CURLOPT_HEADER, FALSE);
 curl_setopt($ch, CURLOPT_POST,true);
 curl_setopt($ch, CURLOPT_POSTFIELDS,$fields);
 $output = curl_exec($ch);
 curl_close($ch);

profile.php:

print_r($_POST);

Nothing seems to be displaying on the page just an empty array, if I do via GET it works. What have I done wrong?

Answer 1

Your $fields string should be in the format "key1=value1&key2=value2..." , without a prepended = . So, in your case:

$fields = "key1=var1&key2=var2&key3=var3";

Additionally, the print_r($_POST) command in your code will render what has been POSTed to your page, not by your page.

Answer 2

//set POST variables
$url = 'http://domain.com/get-post.php';
$fields = array(
                        'lname' => urlencode($last_name),
                        'fname' => urlencode($first_name),
                        'title' => urlencode($title),
                        'company' => urlencode($institution),
                        'age' => urlencode($age),
                        'email' => urlencode($email),
                        'phone' => urlencode($phone)
                );

//url-ify the data for the POST
foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
rtrim($fields_string, '&');

//open connection
$ch = curl_init();

//set the url, number of POST vars, POST data
curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_POST, count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);

//execute post
$result = curl_exec($ch);

//close connection
curl_close($ch);