PHP将多维数组转换为查询字符串以进行curl POST

Question

I'm aware that curl's POSTFIELDS option will take either a query string or an associative array.

curl_setopt($curl, CURLOPT_POSTFIELDS, $_POST);

But lets say I have a page with an input like this:

<input type="text" name="address[line1]">

PHP will create a multi-dimensional array $_POST['address']['line1'], which unfortunately curl_setopt doesn't know what to do with. Is there some simple way to convert an associative array that is potentially multidimensional into a valid HTTP query string?

Alternately, is there some way to access the raw HTTP post query string like you can do with the get $_SERVER['QUERY_STRING']?

Answer 1

You can use http_build_query() to create a string that you can pass to cURL:

<?php
$posted = ["foo"=>"bar", "address"=>["line1"=>"foo"]];
$string = http_build_query($posted);

echo $string;

You can also get access to the raw POST data using input:// but that is rarely necessary, unless dealing with non-HTML data.