Php Unserialize Audit

Q: What is a Claude Code skill and how does the Php Unserialize Audit skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Php Unserialize Audit is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: languages · Last updated: 2026-06-13

lang:php type:audit

Audit PHP engine deserialization surface (unserialize, session decoders, WDDX, phar metadata, custom ce->unserialize handlers, Serializable implementers, magic-method dispatch during deserialization) for UAF via R:/r: back-references, type confusion, partial-object __destruct, signed-length heap overflow, and parse inconsistency. Gathers zval / HashTable / var_hash semantics before launching parallel sonnet agents. Opus verifies HIGH/MEDIUM findings. For general (non-deserialization) PHP memory-safety bugs like user-callback reentrancy UAFs, use /php-audit instead.

About this skill (catalog notes)

Php Unserialize Audit includes worked examples; 21 code blocks for direct copy-paste. At roughly 3,776 words the SKILL.md is on the longer end of the catalog distribution.

License: MIT
Original author: califio
Indexed lastmod: 2026-06-13
Catalog position: Engineering · languages
Indexed related skills: 10

How Php Unserialize Audit fits the catalog

Php Unserialize Audit sits in the Engineering category under the languages sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Purpose: find exploitable bugs in PHP's deserialization surface and related object-lifetime code that is reachable through deserialization. For general PHP engine memory-safety bugs outside the deserialization flow (e.g. the extract() callback-reentrancy UAF, array_walk callback mutations, generic hash-slot UAFs), use the companion /php-audit skill.

What this skill does

Php Unserialize Audit is a community-contributed Claude Code skill in the languages sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/php-unserialize-audit/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Php Unserialize Audit Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/php-unserialize-audit
curl -L https://claudskills.com/skills/php-unserialize-audit/SKILL.md \
  -o ~/.claude/skills/php-unserialize-audit/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/php-unserialize-audit/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/php-unserialize-audit/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\php-unserialize-audit\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Php Unserialize Audit Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/php-unserialize-audit/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Php Unserialize Audit skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Php Unserialize Audit skill?

Use Php Unserialize Audit when your Claude Code task falls under the Engineering category — specifically in the languages area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Php Unserialize Audit" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Php Unserialize Audit skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Php Unserialize Audit is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/califio/skills/blob/ad461d511f949a0526ca489a21dcaff0346ac64b/plugins/php-unserialize-audit/skills/php-unserialize-audit/SKILL.md
License: MIT
Author: califio

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

califio. (2026). Php Unserialize Audit [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/php-unserialize-audit/

BibTeX

@misc{php-unserialize-audit-2026,
  author    = {califio},
  title     = {Php Unserialize Audit [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/php-unserialize-audit/}
}

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