How to Make CURL Requests Through a Proxy Server?

How to Utilize CURL with a Proxy

Using CURL with a proxy server allows you to establish a connection through an intermediary to access restricted content or bypass geographical restrictions. To implement this, follow these steps:

1. Define the Target URL and Proxy Configuration:

• Assign the target URL you intend to access to the $url variable.
• Specify the proxy server and port in the $proxy variable. Use the format "IP_ADDRESS:PORT".
• Optionally, if your proxy requires authentication, set $proxyauth to "USERNAME:PASSWORD".

2. Initialize CURL and Set Options:

• Use curl_init() to create a CURL session.

• Configure the following options for the session:

  • CURLOPT_URL: Set this to the target URL.
  • CURLOPT_PROXY: Set this to the proxy string.
  • CURLOPT_PROXYUSERPWD: (Optional) Set this if authentication is needed.
  • CURLOPT_FOLLOWLOCATION: Allow CURL to follow redirects.
  • CURLOPT_RETURNTRANSFER: Return the response as a string.
  • CURLOPT_HEADER: Retrieve only the HTTP headers.

3. Execute the Request and Handle the Response:

• Execute the request using curl_exec($ch).
• Return the retrieved data to a variable, such as $curl_scraped_page.
• Close the CURL session with curl_close($ch).

4. Utilize the Returned Data:

• The $curl_scraped_page variable will contain the requested data.
• If you do not want to retrieve headers, comment out CURLOPT_HEADER.
• If desired, disable proxy usage by setting CURLOPT_PROXY to null.

Additional Tips:

• Correct syntax errors, such as missing T_VARIABLE declarations.
• Ensure the proxy is active and reachable.
• If encountering any issues, consult the curl_setopt() documentation.

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