CurlMultipartBodyWithJsonContentType

warning native on by default

Group: Probable bugs

An array supplied as cURL post fields generates multipart content. Encode the body explicitly before declaring it to be JSON.

Example

<?php
$h=curl_init();curl_setopt($h,CURLOPT_POSTFIELDS,["id"=>1]);curl_setopt($h,CURLOPT_HTTPHEADER,["Content-Type: application/json"]);curl_exec($h);

Reported:

• line 2: Encode the request body as JSON before declaring JSON content.

Detection

• Same resolved curl handle has CURLOPT_POSTFIELDS set to literal array and final CURLOPT_HTTPHEADER list includes Content-Type: application/json. No later body/header replacement before execution. Highlight conflicting header configuration.
• Resolve builtin functions, classes, constants and methods; user-defined lookalikes are excluded. Follow only bounded local proof in one lexical scope.
• Emit one finding per violating operation, not per supporting evidence statement. When the proof is inconclusive, nothing is reported.

Exceptions (no report)

• Do not report unresolved or shadowed builtin names, unknown values, or incomplete receiver/type provenance. Unknown calls, aliases escaping, and intervening writes invalidate local proof. Similar code outside the stated detection contract is not a finding.
• Both standard suppression forms suppress this native ID.

Fix

None. Choosing a repair requires intent or additional runtime information.

PHP versions

Available throughout supported PHP 5.3–8.5 where the referenced builtin/extension is available. Respect syntax/version-specific receiver contracts; unavailable APIs are not this rule’s concern.

Configure

In custos.json:

{
  "rules": {
    "CurlMultipartBodyWithJsonContentType": {
      "enabled": false
    }
  }
}

Suppress

Before the statement or declaration (or the first statement of the file):

// @custos-ignore CurlMultipartBodyWithJsonContentType