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Agent skill

Php Security

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

PHP-only security standards for database access, password handling, and input validation.

MITAuto-check passedSecurity

Install Php Security

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill php-security -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard php-security --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/php/php-security .claude/skills/php-security && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
php-security
GitHub stars
572
Token cost
~604 tokens
SKILL.md length
179 words
Files
3 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

PHP-only security standards for database access, password handling, and input validation.

  • Securing PHP apps against SQL injection
  • SKILL.md covers Priority: P0 (CRITICAL), Structure, Implementation Guidelines and Anti-Patterns, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Weak password storage

What it does

Php Security is an agent skill from HoangNguyen0403/agent-skills-standard. PHP-only security standards for database access, password handling, and input validation. Use when securing PHP apps against SQL injection, XSS, or weak password storage; defer Laravel middleware and security questions in other languages.

Its SKILL.md is about 600 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/implementation.md`).

It sits in Security, covering Web application vulnerabilities and Backend development. It works with PHP and Laravel. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Securing PHP apps against SQL injection
  • Weak password storage
  • Defer Laravel middleware and security questions in other languages

Example prompts

  • “/php-security”

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Php Security loads about 604 tokens when it runs, and up to ~773 if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 179 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~63
When it runs · the whole SKILL.md, loaded when a task matches
~604
With references · SKILL.md plus every file in references/, read only if the agent opens them
~773

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 179 words, ~604 tokens.

Download SKILL.mdSave it as .claude/skills/php-security/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
php-security
description
PHP-only security standards for database access, password handling, and input validation. Use when securing PHP apps against SQL injection, XSS, or weak password storage; defer Laravel middleware and security questions in other languages.

PHP Security

Priority: P0 (CRITICAL)

Structure

text
src/
└── Security/
    ├── Validators/
    └── Auth/

Implementation Guidelines

  • Prepared Statements: Use PDO with Parameterized Queries: $stmt = $pdo->prepare('SELECT * FROM users WHERE id = :id'); $stmt->execute([':id' => $id]);. NEVER concatenate user input into SQL strings.
  • Password Hashing: ALWAYS use password_hash() with PASSWORD_ARGON2ID (PHP 7.4+) or PASSWORD_BCRYPT.
  • Auth Verification: Use password_verify(). Use password_needs_rehash() to upgrade legacy hashes. Implement Rate Limiting and MFA where appropriate.
  • XSS Escaping: Use htmlentities($userInput, ENT_QUOTES | ENT_HTML5, 'UTF-8') or htmlspecialchars() on all user output. Prefer Twig or Blade for auto-escaping.
  • CSRF Protection: Mandate CSRF tokens for all state-changing requests (POST, PUT, PATCH, DELETE).
  • Input Validation: Use filter_var($email, FILTER_VALIDATE_EMAIL) or filter_var($url, FILTER_VALIDATE_URL). Always Whitelist allowed values.
  • File Security: RESTRICT file uploads by MIME type and extension. Store uploads outside public root.
  • Session Safety: Configure session.cookie_httponly = 1, session.cookie_secure = 1, and session.samesite = "Lax".
  • Header Security: Enforce Content-Security-Policy (CSP), X-Frame-Options: DENY, and X-Content-Type-Options: nosniff.

Anti-Patterns

  • No SQL string concatenation: Use PDO prepared statements only.
  • No MD5/SHA1 for passwords: Use password_hash($password, PASSWORD_ARGON2ID).
  • No raw $_GET/$_POST: Validate all input with filter_var() first.
  • No production error display: Log to file; never show to users.

References

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/php/php-security of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/implementation.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Php Security next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Php Security compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Php Security this skillHoangNguyen0403/agent-skills-standard572—~604Automated safety check: PassMIT
Php Laravel Audit0xShe/PHP-Code-Audit-Skill4021 repos~821Automated safety check: PassNone
Auditing Php Applicationstrilwu/secskills157—~2.8kAutomated safety check: PassMIT
Php Framework Auditwgpsec/AboutSecurity1.8k—~767Automated safety check: NotesNone
Spa Auth Developmentgdarko/laravel-vue-starter145—~668Automated safety check: NotesMIT
Psalm Security Analysiscachethq/core230—~4.7kAutomated safety check: PassCustom licence

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Works with

Categories

Questions about Php Security

What does Php Security do?

PHP-only security standards for database access, password handling, and input validation. Php Security is an agent skill from HoangNguyen0403/agent-skills-standard. PHP-only security standards for database access, password handling, and input validation.

When should I use Php Security?

Php Security fits situations like: securing PHP apps against SQL injection; weak password storage; defer Laravel middleware and security questions in other languages.

How do I install Php Security in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill php-security -a claude-code`. Or copy the skill folder (skills/php/php-security in HoangNguyen0403/agent-skills-standard) into .claude/skills/php-security in your project. Claude Code loads it when a task matches its description.

How do I install Php Security in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill php-security -a codex`. Or copy the skill folder (skills/php/php-security in HoangNguyen0403/agent-skills-standard) into .agents/skills/php-security in your project. Codex loads it when a task matches its description.

Can I use Php Security in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill php-security -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/php-security, .gemini/skills/php-security, .github/skills/php-security and .opencode/skills/php-security in your project.

What does Php Security need to run?

SKILL.md names no scripts, command-line tools or credentials: Php Security is instructions for the agent only.

Does Php Security access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Php Security safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Php Security use?

Php Security is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Php Security use?

About 604 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 169 tokens, read only when the agent opens those files.

What are the alternatives to Php Security?

Skills that share tags, products or a category with Php Security: Php Laravel Audit (0xShe/PHP-Code-Audit-Skill, 402 stars), Auditing Php Applications (trilwu/secskills, 157 stars), Php Framework Audit (wgpsec/AboutSecurity, 1.8k stars) and Spa Auth Development (gdarko/laravel-vue-starter, 145 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Php Security?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.