it should be noted that when using CURLOPT_POSTFIELDS in a loop, CURLOPT_POSTFIELDS appends to the sting. You can use unset() if you don't want this sort of behavior.
<?php
//this will append postfields
while(true) {
$options = array(CURLOPT_POSTFIELDS => 'foo=bar&foo2=bar');
$ch = curl_init("http://www.example.com");
curl_setopt_array($ch, $options);
curl_exec($ch);
curl_close($ch);
}
//this will NOT append postfields
while(true) {
$options = array(CURLOPT_POSTFIELDS => 'foo=bar&foo2=bar');
$ch = curl_init("http://www.example.com");
curl_setopt_array($ch, $options);
curl_exec($ch);
curl_close($ch);
unset($options[CURLOPT_POSTFIELDS]);
}
?>
curl_setopt_array
(PHP 5 >= 5.1.3)
curl_setopt_array — Set multiple options for a cURL transfer
Description
$ch
, array $options
)Sets multiple options for a cURL session. This function is useful for setting a large amount of cURL options without repetitively calling curl_setopt().
Parameters
-
ch
-
A cURL handle returned by curl_init().
-
options
-
An array specifying which options to set and their values. The keys should be valid curl_setopt() constants or their integer equivalents.
Return Values
Returns TRUE
if all options were successfully set. If an option could
not be successfully set, FALSE
is immediately returned, ignoring any
future options in the options
array.
Examples
Example #1 Initializing a new cURL session and fetching a web page
<?php
// create a new cURL resource
$ch = curl_init();
// set URL and other appropriate options
$options = array(CURLOPT_URL => 'http://www.example.com/',
CURLOPT_HEADER => false
);
curl_setopt_array($ch, $options);
// grab URL and pass it to the browser
curl_exec($ch);
// close cURL resource, and free up system resources
curl_close($ch);
?>
Prior to PHP 5.1.3 this function can be simulated with:
Example #2 Our own implementation of curl_setopt_array()
<?php
if (!function_exists('curl_setopt_array')) {
function curl_setopt_array(&$ch, $curl_options)
{
foreach ($curl_options as $option => $value) {
if (!curl_setopt($ch, $option, $value)) {
return false;
}
}
return true;
}
}
?>
Notes
Note:
As with curl_setopt(), passing an array to
CURLOPT_POST
will encode the data as multipart/form-data, while passing a URL-encoded string will encode the data as application/x-www-form-urlencoded.

Starting in PHP 5.2.0, CURLOPT_FOLLOWLOCATION can't be set via curl_setopt_array() (or curl_setopt()) when either safe_mode is enabled or open_basedir is set. In these cases, the order of CURLOPT_* settings in the array can be important.
In case that you need to read SSL page content from https with curl, this function can help you:
<?php
function get_web_page( $url,$curl_data )
{
$options = array(
CURLOPT_RETURNTRANSFER => true, // return web page
CURLOPT_HEADER => false, // don't return headers
CURLOPT_FOLLOWLOCATION => true, // follow redirects
CURLOPT_ENCODING => "", // handle all encodings
CURLOPT_USERAGENT => "spider", // who am i
CURLOPT_AUTOREFERER => true, // set referer on redirect
CURLOPT_CONNECTTIMEOUT => 120, // timeout on connect
CURLOPT_TIMEOUT => 120, // timeout on response
CURLOPT_MAXREDIRS => 10, // stop after 10 redirects
CURLOPT_POST => 1, // i am sending post data
CURLOPT_POSTFIELDS => $curl_data, // this are my post vars
CURLOPT_SSL_VERIFYHOST => 0, // don't verify ssl
CURLOPT_SSL_VERIFYPEER => false, //
CURLOPT_VERBOSE => 1 //
);
$ch = curl_init($url);
curl_setopt_array($ch,$options);
$content = curl_exec($ch);
$err = curl_errno($ch);
$errmsg = curl_error($ch) ;
$header = curl_getinfo($ch);
curl_close($ch);
// $header['errno'] = $err;
// $header['errmsg'] = $errmsg;
// $header['content'] = $content;
return $header;
}
$curl_data = "var1=60&var2=test";
$url = "https://www.example.com";
$response = get_web_page($url,$curl_data);
print '<pre>';
print_r($response);
?>
There is no CURLOPT_MAXFILESIZE in the PHP module but it's function only works with Content-Length headers anyway. There are two ways of checking download sizes, one is after the download is complete using filesize(), the other is as the download is running allowing you to terminate before wasting time and disk space.
<?php
$GLOBALS['file_size'] = 0;
$GLOBALS['max_file_size'] = 1024 * 1024;
function on_curl_header($ch, $header)
{
$trimmed = rtrim($header);
if (preg_match('/^Content-Length: (\d+)$/', $trimmed, $matches))
{
$file_size = $matches[1];
if ($file_size > $GLOBALS['max_file_size']) {
// handle error here.
}
}
return strlen($header);
}
function on_curl_write($ch, $data)
{
$bytes = strlen($data);
$GLOBALS['file_size'] += $bytes;
if ($GLOBALS['file_size'] > $GLOBALS['max_file_size']) {
// handle error here.
}
return $bytes;
}
$ch = curl_init();
$options = array(CURLOPT_URL => 'http://www.php.net/',
CURLOPT_HEADER => false,
CURLOPT_HEADERFUNCTION => 'on_curl_header',
CURLOPT_WRITEFUNCTION => 'on_curl_write');
curl_setopt_array($ch, $options);
curl_exec($ch);
// ...
?>
You can use CURLOPT_HEADERFUNCTION with a callback inside an object. This makes is it easy to capture the headers for later use. For example:
<?php
class Test
{
public $headers;
//...
public function exec($opts)
{
$this->headers = array();
$opts[CURLOPT_HEADERFUNCTION] = array($this, '_setHeader');
$ch = curl_init();
curl_setopt_array($ch, $opts);
return curl_exec($ch);
}
private function _setHeader($ch, $header)
{
$this->headers[] = $header;
return strlen($header);
}
}
$test = new Test();
$opts = array(
//... your curl opts here
);
$data = $test->exec($opts);
print_r($test->headers);
?>
...something like that
(This works in php v. 5.1.4)