如何在 PHP 中使用 cURL 获得响应

Just use the below piece of code to get the response from restful web service url, I use social mention url.

$response = get_web_page("http://socialmention.com/search?q=iphone+apps&f=json&t=microblogs&lang=fr");
$resArr = array();
$resArr = json_decode($response);
echo "<pre>"; print_r($resArr); echo "</pre>";


function get_web_page($url) {
$options = array(
CURLOPT_RETURNTRANSFER => true,   // return web page
CURLOPT_HEADER         => false,  // don't return headers
CURLOPT_FOLLOWLOCATION => true,   // follow redirects
CURLOPT_MAXREDIRS      => 10,     // stop after 10 redirects
CURLOPT_ENCODING       => "",     // handle compressed
CURLOPT_USERAGENT      => "test", // name of client
CURLOPT_AUTOREFERER    => true,   // set referrer on redirect
CURLOPT_CONNECTTIMEOUT => 120,    // time-out on connect
CURLOPT_TIMEOUT        => 120,    // time-out on response
);


$ch = curl_init($url);
curl_setopt_array($ch, $options);


$content  = curl_exec($ch);


curl_close($ch);


return $content;
}

The crux of the solution is setting

CURLOPT_RETURNTRANSFER => true

then

$response = curl_exec($ch);

CURLOPT_RETURNTRANSFER tells PHP to store the response in a variable instead of printing it to the page, so $response will contain your response. Here's your most basic working code (I think, didn't test it):

// init curl object
$ch = curl_init();


// define options
$optArray = array(
CURLOPT_URL => 'http://www.google.com',
CURLOPT_RETURNTRANSFER => true
);


// apply those options
curl_setopt_array($ch, $optArray);


// execute request and get response
$result = curl_exec($ch);

If anyone else comes across this, I'm adding another answer to provide the response code or other information that might be needed in the "response".

http://php.net/manual/en/function.curl-getinfo.php

// init curl object
$ch = curl_init();


// define options
$optArray = array(
CURLOPT_URL => 'http://www.google.com',
CURLOPT_RETURNTRANSFER => true
);


// apply those options
curl_setopt_array($ch, $optArray);


// execute request and get response
$result = curl_exec($ch);


// also get the error and response code
$errors = curl_error($ch);
$response = curl_getinfo($ch, CURLINFO_HTTP_CODE);


curl_close($ch);


var_dump($errors);
var_dump($response);

Output:

string(0) ""
int(200)


// change www.google.com to www.googlebofus.co
string(42) "Could not resolve host: www.googlebofus.co"
int(0)

The ultimate curl php function:

function getURL($url,$fields=null,$method=null,$file=null){
// author   = Ighor Toth <igtoth@gmail.com>
// required:
//      url     = include http or https
// optionals:
//      fields  = must be array (e.g.: 'field1' => $field1, ...)
//      method  = "GET", "POST"
//      file    = if want to download a file, declare store location and file name (e.g.: /var/www/img.jpg, ...)
// please crete 'cookies' dir to store local cookies if neeeded


// do not modify below
$useragent = 'Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko';
$timeout= 240;
$dir = dirname(__FILE__);
$_SERVER["REMOTE_ADDR"] = $_SERVER["REMOTE_ADDR"] ?? '127.0.0.1';
$cookie_file    = $dir . '/cookies/' . md5($_SERVER['REMOTE_ADDR']) . '.txt';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_FAILONERROR, true);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true );
curl_setopt($ch, CURLOPT_ENCODING, "" );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt($ch, CURLOPT_AUTOREFERER, true );
curl_setopt($ch, CURLOPT_MAXREDIRS, 10 );
curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
curl_setopt($ch, CURLOPT_REFERER, 'http://www.google.com/');
if($file!=null){
if (!curl_setopt($ch, CURLOPT_FILE, $file)){ // Handle error
die("curl setopt bit the dust: " . curl_error($ch));
}
//curl_setopt($ch, CURLOPT_FILE, $file);
$timeout= 3600;
}
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout );
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout );
if($fields!=null){
$postvars = http_build_query($fields); // build the urlencoded data
if($method=="POST"){
// set the url, number of POST vars, POST data
curl_setopt($ch, CURLOPT_POST, count($fields));
curl_setopt($ch, CURLOPT_POSTFIELDS, $postvars);
}
if($method=="GET"){
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
$url = $url.'?'.$postvars;
}
}
curl_setopt($ch, CURLOPT_URL, $url);
$content = curl_exec($ch);
if (!$content){
$error = curl_error($ch);
$info = curl_getinfo($ch);
die("cURL request failed, error = {$error}; info = " . print_r($info, true));
}
if(curl_errno($ch)){
echo 'error:' . curl_error($ch);
} else {
return $content;
}
curl_close($ch);
}

am using this simple one

´´´´ class Connect {

public $url;
public $path;
public $username;
public $password;


$ch = curl_init();


curl_setopt($ch, CURLOPT_URL, $this->url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);


curl_setopt($ch, CURLOPT_USERPWD, "$this->username:$this->password");


//PROPFIND request that lists all requested properties.
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PROPFIND");
$response = curl_exec($ch);


curl_close($ch);