PHP Deprecated Checker

How it works

What it does

The Deprecated Checker looks for known deprecated PHP functions, aliases, and common outdated patterns in pasted source. It helps you prioritize modernization before a version bump turns soft deprecations into hard errors.

When to use it

• Cleaning a legacy plugin before PHP 8.x
• Triaging Deprecated: log noise to actual call sites
• Teaching teams which old APIs to stop copying into new code

How input is processed safely

Detection is pattern/static based. The tool does not execute the paste, does not autoload your classes, and cannot see runtime-only deprecations triggered by specific data paths. It complements—not replaces—running the app under the target PHP with deprecations logged.

Examples

• Spotting long-removed aliases still present in old helpers
• Flagging outdated multibyte or string APIs in a utility file
• Surfacing create_function-era leftovers in abandoned libraries

Common mistakes

• Assuming every deprecation is equally urgent—prioritize by call frequency and PHP target
• Editing vendor code instead of upgrading packages
• Silencing deprecations with @ instead of fixing call sites

Deprecations are early-warning signals. Teams that ignore them for multiple major versions often face a sudden wall when upgrading. This checker helps you inventory the easy textual matches—old function names and common anti-patterns—so you can schedule work instead of discovering everything during an emergency PHP bump.

Not every match is equally important. A deprecated helper called once in an admin script is lower priority than one on the checkout path. Combine results with production logs that include file/line information when you have them.

If a match sits inside vendor code, upgrade the package rather than patching vendor trees. Track upstream issues when a library lags behind your target runtime.

Practical tips

• Keep inputs small and representative; huge pastes slow feedback and raise risk of accidental secret disclosure.
• After using PHP Deprecated Checker, 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

Paste only the relevant functions. Customer PII in string literals should be redacted before analysis.

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.