Frequently Asked Questions
Common questions about PHP web shells, security testing, and phpshells.net.
What is a PHP web shell?
A PHP web shell is a server-side script written in PHP that provides remote access to a web server through a browser interface. Security professionals use these tools during authorized penetration testing engagements to evaluate web application and server security posture. PHP shells can range from simple one-liner command execution scripts to complex multi-featured tools with file management, database browsing, and network scanning capabilities.
Are PHP shells legal to download?
Downloading PHP shells for educational purposes and authorized security testing is generally legal in most jurisdictions. However, deploying them on systems without explicit written authorization is illegal under computer fraud laws such as the CFAA (US), Computer Misuse Act (UK), and similar legislation worldwide. Always ensure you have proper authorization before using any security testing tools. phpshells.net provides tools exclusively for legitimate security research and authorized testing.
What is the difference between PHP shell types?
PHP shells are categorized by their primary function. Mini shells (<50KB) provide essential command execution in a compact package. Full-featured PHP shells (100KB+) include file managers, database browsers, and network tools. Bypass shells specialize in circumventing security restrictions like disabled functions and WAF rules. Backdoor shells focus on persistent, stealthy access for testing incident response. File manager shells emphasize file system operations. Rootkit shells test deep system-level security. Web shells provide browser-based vulnerability scanning.
How do I use PHP shells for penetration testing?
PHP shells should only be used in controlled, authorized environments. The workflow involves: 1) Obtaining written authorization (Rules of Engagement), 2) Setting up an isolated test environment, 3) Deploying the shell to test specific security controls, 4) Systematically testing upload restrictions, WAF rules, access controls, and command execution prevention, 5) Documenting findings with evidence, and 6) Providing remediation recommendations. Follow established frameworks like OWASP Testing Guide, PTES, or NIST SP 800-115.
Which PHP shell is best for penetration testing?
The best shell depends on your testing scenario. For comprehensive assessments, c99 Shell and r57 Shell offer full-featured toolkits with file management, database browsing, and network tools. b374k Shell provides password-protected access with encryption. For quick assessments, p0wny Shell or Mini Shell Pro offer essential functionality in under 20KB. For WAF testing, specialized bypass shells are recommended. For testing incident response, backdoor shells with stealth features are appropriate.
What is a bypass shell?
A bypass shell is a specialized PHP shell designed to circumvent security restrictions commonly found in hardened PHP environments. These include disabled PHP functions (exec, system, passthru, shell_exec), open_basedir restrictions, safe_mode configurations, and Web Application Firewall (WAF) rules. Security teams use bypass shells to evaluate whether their security configurations are comprehensive and effective.
Can PHP shells be detected by security software?
Some PHP shells include obfuscation, encoding, and anti-detection techniques to test the effectiveness of security software. This helps security teams evaluate whether their antivirus, endpoint detection (EDR), web application firewalls (WAF), and file integrity monitoring systems can identify various forms of malicious scripts. Testing detection capabilities is a critical part of security assessments.
How often is the phpshells.net collection updated?
The collection is regularly updated with new shell versions and additions as they become available. We track updates to popular shells, add new tools contributed by the security community, and remove outdated versions. Each listing includes version information and the date it was added to the collection.
Do I need to register to download shells?
No. phpshells.net does not require registration, accounts, or any personal information to browse or download shells. All tools are freely accessible. We believe security testing resources should be openly available to professionals without barriers.
What PHP versions are supported?
Most shells in our collection support PHP 5.x through PHP 8.x, covering the vast majority of production PHP deployments. Some older shells may have compatibility issues with PHP 8.x due to deprecated functions. Each shell's detail page includes specific version and compatibility information.
How do I report a malicious or broken shell?
If you discover a shell that contains unintended malicious code, broken functionality, or outdated information, please contact us through our contact page. We review all reports promptly and take appropriate action to maintain the quality and safety of our collection.
What is a rootkit shell?
A rootkit shell operates at a deeper system level than standard PHP shells, designed to test kernel-level security controls, privilege escalation defenses, and system-level intrusion detection capabilities. These advanced tools evaluate how well a system detects unauthorized privilege escalation and system-level tampering. Due to their invasive nature, rootkit shells should only be used with explicit authorization in fully isolated test environments.