It have two products libcurl and cURL.
cURL: Its command line tool for transferring information.
Libcurl: It is a free client-side URL transfer library.
CURL COMMAND-LINE EXAMPLE
Curl Example with "GET" Method (By Default GET)
curl http://www.web-technology-experts-notes.in/p/sitemap.html
Curl Example with "POST" Method
curl --request POST http://www.web-technology-experts-notes.in/p/sitemap.html
Curl Example with "PUT" Method
curl --request PUT http://www.web-technology-experts-notes.in/p/sitemap.html
Curl Example with "DELETE" Method
curl --request DELETE http://www.web-technology-experts-notes.in/p/sitemap.html
Curl Example with "POST" Method and pass data (Data: username, password & logintype)
curl --request POST http://www.web-technology-experts-notes.in/p/sitemap.html --data 'username=user&password=****&logintype=normal'
Curl Example with "POST" Method and pass data(data in text file)
curl --request POST http://www.web-technology-experts-notes.in/p/sitemap.html --data @datafile.txt
Curl Example with "POST" Method, pass data and pass header
curl --request POST http://www.web-technology-experts-notes.in/p/sitemap.html --data @datafile.txt --header 'sessionid:9874563211235884'
Curl Example with "POST" Method, pass data and pass header (Get Header in response) --include
curl --request POST http://www.web-technology-experts-notes.in/p/sitemap.html --data @datafile.txt --header 'sessionid:9874563211235884' --include
CURL LIBCURL EXAMPLE
Mostly to get data from an REST API, we use following method in phpecho file_get_contents('http://www.web-technology-experts-notes.in/p/sitemap.html');
But if, "allow_url_fopen" is disable in php.ini file due to security reason then above will not work.
You need to use below code$ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "http://www.google.co.in"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_HEADER, 0); $output = curl_exec($ch); curl_close($ch); echo $output;die;
CURL Example with Post Method with parameter
$url = "http://localhost/test/index2";
$post_data = array(
"foo" => "bar",
"foo1" => "testdata"
);
try {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$output = curl_exec($ch);
curl_close($ch);
} catch (Exception $e) {
echo $e->getMessage();die;
}
File Upload with CURL in PHP
$file_name_with_full_path = realpath('uploadFile.zip');
$url = "http://localhost/test/index2";
$post_data = array(
"foo" => "bar",
"upload" => "@".$file_name_with_full_path
);
try {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$output = curl_exec($ch);
curl_close($ch);
} catch (Exception $e) {
echo $e->getMessage();
die;
}
Transfer the File through FTP
curl_setopt_array($ch, array(
CURLOPT_URL => 'ftp://ftp.example.com/test.txt',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_USERPWD => 'username:password'
));
$output = curl_exec($ch);
Set Header and Json data in Curl
$url='http://www.web-technology-experts-notes.in/';
$jsonData='{"name":"arun","email":"arun@gmail.com"}';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'X-API-Token: ' . X_API_TOKEN,
'Content-Type: application/json',
"HTTP_X_FORWARDED_FOR: xxx.xxx.x.xx"
));
curl_setopt($ch, CURLOPT_INTERFACE, "xxx.xxx.x.xx");
echo curl_exec($ch);
curl_close($ch);
Following are some Options which can be set be set in "curl_setopt" functionCURLOPT_REFERER - Set the Http Refer
CURLOPT_USERAGENT - Set the UserAgent
CURLOPT_HEADER - Include the header in response or not
CURLOPT_RETURNTRANSFER - Print the output or not
CURLOPT_URL - Set the URL (Uniform Resource Locator)
CURLOPT_POST - set 0 or 1 for post method
CURLOPT_POSTFIELDS - set the data which you want to post
CURLOPT_FOLLOWLOCATION - if set true, cURL will follow redirects
CURLOPT_CONNECTTIMEOUT -Total seconds to spend attempting to connect
CURLOPT_TIMEOUT - Total Seconds to allow cURL to execute
Zend CURL Ignore SSL_VERIFYPEER
Zend Curl Example
$config = array(
'adapter' => 'Zend_Http_Client_Adapter_Curl',
'ssltransport' => 'tls',
'strict' => false,
'persistent' => true,
);
$url = 'http://www.example.com';
$client = new Zend_Http_Client($url, $config);
$postArray = array('name'=>'Georage','age'=>33);
$client->setParameterPost($postArray);
/** set Headers **/
$client->setHeaders(array(
'Host: www.example.com',
'User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0',
'Accept: text/javascript, application/javascript, */*',
'Accept-Language: en-gb,en;q=0.5',
'Accept-Encoding: gzip, deflate',
'Content-Type: application/x-www-form-urlencoded; charset=UTF-8',
'X-Requested-With: XMLHttpRequest',
'Referer: http://example.com'
));
/** set cookie **/
$client->setCookie('__utma', '174057141.1507422797.1392357517.1392698281.1392702703.3');
$client->setCookie('__utmz', '174057141.1392357517.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)');
$client->setCookie('__atuvc', '58');
$client->setCookie('PHPSESSID', '0a12ket5d8d7otlo6uh66p658a5');
$response = $client->request('POST');
$data= $response->getBody();
echo $data;
Zend CURL Ignore SSL_VERIFYPEER
$url='www.example.com';
$config = array(
'adapter' => 'Zend_Http_Client_Adapter_Curl',
'curloptions' => array(
CURLOPT_FOLLOWLOCATION => TRUE,
CURLOPT_SSL_VERIFYPEER => FALSE
),
);
$client = new Zend_Http_Client($url, $config);
$response = $client->request('GET');
Set CURL'S Timeout in Milli-seconds
$ch = curl_init();
//set the curl for crawl
curl_setopt($ch, CURLOPT_URL, "http://www.web-technology-experts-notes.in/2014/03/captcha-code-example.html");
//include the header in the output
curl_setopt($ch, CURLOPT_HEADER, 0);
//The number of seconds to wait while trying to connect. Use 0 to wait indefinitely.
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 0);
//The maximum number of milliseconds to allow cURL functions to execute.
curl_setopt($ch, CURLOPT_TIMEOUT_MS, 4000); //timeout in seconds
$output = curl_exec($ch);
curl_close($ch);
Set Zend CURL'S Timeout in Milli-seconds
$config = array(
'adapter' => 'Zend_Http_Client_Adapter_Curl',
'curloptions' => array(
CURLOPT_FOLLOWLOCATION => FALSE,
CURLOPT_HEADER => false,
//The number of seconds to wait while trying to connect. Use 0 to wait indefinitely.
CURLOPT_TIMEOUT_MS => 3000,
//The maximum number of milliseconds to allow cURL functions to execute.
CURLOPT_CONNECTTIMEOUT_MS => 3000
)
);
$url = "http://www.web-technology-experts-notes.in/2014/03/captcha-code-example.html";
$client = new Zend_Http_Client($url, $config);
$response = $client->request('GET');
$output = $response->getBody();
Question: How to Set the username/password in CURL?
curl -X POST -u "USERNAME":"PASSWORD" --header "Content-Type: audio/flac" --header "Transfer-Encoding: chunked" "https://stream.watsonplatform.net/speech-to-text/api/v1/recognize"
Question: How to pass binary data(file) in CURL ?
curl -X POST -u "USERNAME":"PASSWORD" --header "Content-Type: audio/flac" --header "Transfer-Encoding: chunked" --data-binary @audio.flac "https://stream.watsonplatform.net/speech-to-text/api/v1/recognize"
Question: How to store linux command output in file?
curl -X POST -u "USERNAME":"PASSWORD" --header "Content-Type: audio/flac" --header "Transfer-Encoding: chunked" --data-binary @audio.flac "https://stream.watsonplatform.net/speech-to-text/api/v1/recognize" > output1.txt
