/run-on-3v4l
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.
$ npx -y skills add phpstan/phpstan --skill run-on-3v4l --agent claude-codeHow it fires
How this skill gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
- You can call itInvoke it directly when you want it.
- Slash command
/run-on-3v4l
Context preview
The summary Claude sees to decide when to auto-load this skill.
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.
SKILL.md
run-on-3v4l.SKILL.mdname: 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: <php-code-or-file>
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: `$ARGUMENTS`
Step 1: Research the 3v4l.org submission form
Fetch the 3v4l.org homepage and examine the HTML form to understand how to submit code:
curl -s https://3v4l.org/ | head -200
Look for:
- The form action URL and HTTP method
- Required form fields (the code textarea name, any hidden fields)
- How the response redirects to the result page
Step 2: Prepare executable PHP code
Take the PHP code and make it executable:
- If the code defines classes/functions but doesn't call them, add test calls that exercise the interesting code paths
- Add `var_dump()` or `echo` statements to show return values and types
- Wrap potentially-erroring code in try/catch if needed to see the actual behavior
- Make sure the code actually produces output that demonstrates the behavior
Step 3: Submit to 3v4l.org
Submit the prepared code to 3v4l.org using the form submission mechanism you discovered in Step 1.
Step 4: Fetch results
After submission, retrieve the results via the REST API:
curl -s -H 'Accept: application/json' 'https://3v4l.org/<short-id>'
Parse the JSON to see actual PHP output across different PHP versions.
Step 5: Present results
Show:
- The 3v4l.org link for the user to view in browser
- A summary of the output across PHP versions
- Any differences in behavior between PHP versions
Read more
name: run-on-3v4l description: Execute PHP code on 3v4l.org to test runtime behavior across multiple PHP versions. Use when you need to verify what PHP actually does with a piece of code. argument-hint: <php-code-or-file> disable-model-invocation: false
Run PHP code on 3v4l.org
Execute PHP code on 3v4l.org to test actual runtime behavior across multiple PHP versions. This is critical — do NOT reason about what PHP would do, actually test it.
The code to run: `$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()` or `echo` statements 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
PHP Static Analysis Tool - discover bugs in your code without running it!