PHP Serialize Encoder

How it works

What it does

The PHP Serialize Encoder builds serialize()-compatible strings from controlled structured inputs (scalars and arrays). It is useful for fixtures, cache key archaeology, and interoperability tests when you need a known serialized blob.

It pairs with the existing Serialize Viewer for inspection workflows, while keeping object injection risks out of the encode path.

When to use it

• Creating test vectors for legacy storage columns
• Documenting migration from PHP serialize to JSON
• Generating compact array payloads for debugging parsers

How input is processed safely

Encoding accepts structured form/JSON-like safe inputs and returns serialized text. It does not unserialize arbitrary attacker-controlled object graphs, does not instantiate classes, and does not execute custom __wakeup logic. Prefer JSON for new systems whenever possible.

Examples

• Encode a nested array of scalars for a unit test
• Produce a serialized string matching a legacy options row shape
• Show length prefixes changing when strings grow

Common mistakes

• Using serialize for untrusted user input storage
• Editing serialized strings by hand and breaking length prefixes
• Assuming serialized objects are safe to unserialize later

PHP’s serialize format embeds types and string lengths. Hand-editing those lengths almost always corrupts the blob. Prefer regenerating from structured input whenever something changes.

Object serialization is intentionally out of scope for safe online tooling because untrusted deserialization is a classic vulnerability class. If legacy systems require objects, perform migrations inside locked-down environments with audited allow-lists—never as a public paste tool.

New features should store JSON (or a proper schema format) instead of serialize. Use this encoder to bridge tests and migrations while you retire the old representation.

Practical tips

• Keep inputs small and representative; huge pastes slow feedback and raise risk of accidental secret disclosure.
• After using PHP Serialize Encoder, verify the result in your own environment (correct SAPI, correct host, correct project root).
• Cross-link findings to ZendStudio.net PHP error guides and IDE setup pages when the next step is configuration rather than code edits.
• Prefer repeatable project tooling (CI, Composer scripts, IDE inspections) for repo-wide enforcement; this page is for interactive problem-solving.

Privacy note

Serialized data can embed secrets just like JSON. Use dummy values. Never paste production session payloads containing authentication material.

Safety notes

• Submitted tool contents are not written to analytics or search logs.
• This site never evaluates arbitrary PHP from the browser.
• Generated configs are starting points—validate on a staging host before production.