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PHP 8 disable_functions bypass PoC

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HN · launched Mar 3, 2026 · 29 upvotes (top 21%) · 1 view

Niche: exploit proof of concept repositories · 134 launches, 7 in the last 7 days ▼ -22% · Explore this niche →

Category and tags

  • Security
  • Dev tools
  • Developer
  • Not AI
  • Hobby / open-source project

Visit website ↗ Source listing ↗

Could you build this?

No Creating a reliable PHP 8 disable_functions bypass requires deep binary exploitation knowledge, memory corruption primitives, and low-level understanding of Zend Engine internals.

What it would actually take: Developing this requires specialized binary exploitation skills and deep knowledge of C, glibc memory allocators, and PHP's Zend Engine. The process involves finding memory safety bugs or exploitable behaviors across PHP core extensions (such as FFI, PCNTL, or heap corruptions in standard modules), constructing arbitrary read/write memory primitives, and circumventing modern mitigation mechanisms (ASLR, NX, RELRO) to execute shellcode or invoke execve directly in memory.

Discussion

10 comments analyzed.

Concerns raised: disable_functions not actually a security feature, easily bypassed, PHP doesn't handle object resurrection or memory corruption properly, False sense of security from disable_functions in shared hosting, PHP standard library has many 'really bad parts' that can't be properly excluded

Feature requests: Proper sandbox/security mechanism to replace disable_functions, Better handling of object resurrection in destructors, Memory safety improvements to prevent use-after-free vulnerabilities

Competitors

Other products that read as similar to this one : 355 launches clear the similarity bar, closest 8 shown.

Attention rank: #73 of 356 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 96 days after the earliest competitor.

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.