How to Set Up Proxies in PHP cURL

<?php
$ch = curl_init("https://httpbin.org/ip");
curl_setopt($ch, CURLOPT_PROXY, "host:port");
curl_setopt($ch, CURLOPT_PROXYUSERPWD, "user:pass");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
echo $response;

PHP's cURL binding mirrors the command-line tool: set CURLOPT_PROXY to the host:port and CURLOPT_PROXYUSERPWD to the credentials rather than jamming them into one string. Add CURLOPT_PROXYTYPE = CURLPROXY_SOCKS5_HOSTNAME when you need SOCKS5 with remote DNS. Reuse the curl handle across requests to the same rotating gateway to benefit from keep-alive, and always check curl_error() so a dead proxy surfaces instead of returning silently empty output.

PHP cURL works cleanly with rotating backconnect endpoints — point it at a single gateway host and the provider rotates the exit IP for you.

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