By name: run-on-3v4l
description: Execute PHP code on 3v4l.org to test runtime behavior across multiple PHP versions. Use when you need to verify what PHP actually does with a piece of code.
argument-hint:
disable-model-invocation: false
Run PHP code on 3v4l.org
Execute PHP code on 3v4l.org to test actual runtime behavior across multiple PHP versions. This is critical — do NOT reason about what PHP would do, actually test it.
The code to run: $ARGUMENTS
Step 1: Research the 3v4l.org submission form
Fetch the 3v4l.org homepage and examine the HTML form to understand how to submit code:
curl -s https://3v4l.org/ | head -200
Look for:
- The form action URL and HTTP method
- Required form fields (the code textarea name, any hidden fields)
- How the response redirects to the result page
Step 2: Prepare executable PHP code
Take the PHP code and make it executable:
- If the code defines classes/functions but doesn't call them, add test calls that exercise the interesting code paths
- Add
var_dump()orechostatements to show return values and types - Wrap potentially-erroring code in try/catch if needed to see the actual behavior
- Make sure the code actually produces output that demonstrates the behavior
Step 3: Submit to 3v4l.org
Submit the prepared code to 3v4l.org using the form submission mechanism you discovered in Step 1.
Step 4: Fetch results
After submission, retrieve the results via the REST API:
curl -s -H 'Accept: application/json' 'https://3v4l.org/<short-id>'
Parse the JSON to see actual PHP output across different PHP versions.
Step 5: Present results
Show:
- The 3v4l.org link for the user to view in browser
- A summary of the output across PHP versions
- Any differences in behavior between PHP versions