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Asked: 2026-06-03T07:04:06+00:00

Is there an equivalent for curl –resolve …. in PHP CURL library ? Background:

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Is there an equivalent for curl --resolve .... in PHP CURL library ?

Background: I have round-robin DNS (one domain name resolves to multiple IPs), and I want to send a request to a specific host. I use apache name-based virtual hosts, and thus a correct domain name must appear in the HTTP request.

I have tried specifying the IP in the request URL: curl_setopt($ch, CURLOPT_URL, '127.0.0.1'), and using curl_setopt($ch, CURLOPT_HTTPHEADER, 'Host: example.com'). It works for HTTP, but for HTTPS I get SSL verification error (apparently CURL verifies certificate vs. URL hostname and NOT Host: hostname).

Using hosts file is not a convenient option.

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1 Answer

  1. Editorial Team

    First, the best way to get an answer to how any curl option translates to libcurl (or PHP/CURL) is by using the –libcurl option.

    If you do, you will learn that –resolve translates to CURLOPT_RESOLVE with libcurl, supported in PHP since 5.5.0. Supported by libcurl since 7.21.3.

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