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Programming  »  PHP
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How to use cURL in PHP

By: Anton Locsin
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Date Added : June 19, 2010 Views : 288



cURL, otherwise known as Client URL, is a powerful PHP extension that is designed to download/upload content and data from/to other URLs. This command line tool was created by Daniel Stenberg in 1998.

The first step is to install the cURL extension in PHP.  The cURL version you need would vary with the PHP version that you have.

Below is a basic example on how to use cURL.

$ch=curl_init();
curl_setopt($ch,CURLOPT_URL,'http://mywebsite.com');
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,5);
curl_exec($ch);
curl_close($ch);
?>
 

The first line initializes the cURL handle, while the second line sets the URL that you want to access. The third line sets the option to load a page within 5 seconds before timing out. This will ensure that pages that take too long to load will only load within 5 seconds. curl_exec() executes the handle while curl_close() closes the handle. The example above shows a basic cURL function to retrieve 5 seconds of data from mywebsite.com.
 
The options in cURL vary and have different functions. curl_seropt() is considered as the most challenging area in the cURL library because you need to understand each option and their functions. A list of all the cURL options may be found online.

cURL can be used in a wide array of sorts. Whether you use cURL to retrieve web pages, download content, authentication use, cURL is an effective alternate to access these services while saving a lot of time.




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