Difference between command line cURL and PHP cURL

Try to debug the request in both cases:

a) Terminal: use curl verbose mode: curl -v and check the http request sent, especially check the header list

b) php curl: print the http request using CURLINFO_HEADER_OUT:

curl_setopt($ch, CURLINFO_HEADER_OUT, true);curl_exec($ch);$info = curl_getinfo($ch);print_r($info['request_header']);

Testing the different headers, what made it work was adding "Pragma: no-cache" header to the request:

$headers[] = 'Pragma: no-cache';

On the other hand, in terminal curl, I had to uppercase the request headers, e.g. User-Agent etc.

Try to create a tcp connection with fsockopen:

$fp = fsockopen("ssl://"."www.example.com", 443, $errno, $errstr, 30);if (!$fp) {    echo "$errstr ($errno)<br />\n";} else {    $out = "GET / HTTP/1.1\r\n";    $out .= "Host: www.example.com\r\n";    $headers = array();    $headers[] = 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.70 Safari/537.36';    $headers[] = 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3';    $headers[] = 'Accept-Language: de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7';    $headers[] = 'Authority: www.example.com';    $out .= $headers;    $out .= "Connection: Close\r\n\r\n";    fwrite($fp, $out);    while (!feof($fp)) {        echo fgets($fp, 1024);    }    fclose($fp);

and test if this works. Maybe the issue is either that php curl adds some info to the http request or the problem is on the tcp connection level, some info added there.

References

• cURL works from Terminal, but not from PHP
• PHP cURL: modify/overwrite Connection header
• Sending TCP Data with PHP

Command line curl :

It is a tool to transfer data to or from a server, using any of the supported protocols (HTTP, FTP, IMAP, POP3, SCP, SFTP, SMTP, TFTP, TELNET, LDAP or FILE). curl is powered by Libcurl. This tool is preferred for automation, since it is designed to work without user interaction. curl can transfer multiple file at once.For more details for Command line curl

Syntax:

curl [options] [URL...]

Example:

curl http://site.{one, two, three}.com

PHP cURL

$ch = curl_init('http://example.com/wp-login.php');curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);if($this->getRequestType() == 'POST'){    curl_setopt($ch, CURLOPT_POST, true);    curl_setopt($ch, CURLOPT_POSTFIELDS,         array(            'user[name]'    => 'Generic+Username',            'user[email]'   => 'mahekpatel04@gmail.com'        );    );}$response   = curl_exec($ch);

The issue is with ciphers selected by PHP's cURL by default.

Running curl command with -Ivs options allows us to see what ciphers it uses:

* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH

Setting them in PHP allows it to bypass this mysterious check:

curl_setopt($ch,  CURLOPT_SSL_CIPHER_LIST,  'ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH');

Also, it seems that Host header and using HTTPv2 should be added:

$headers[] = 'Host: www.11880.com';// ...curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);