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.php

PHP Source

Web & Development

PHP is executable source, often for servers. Opening a file in a browser is not the same as processing it into HTML. Inspect in an editor; match runtime version and configuration before execution.

What it is used for
Server-side logic and PHP program source
What the file contains
Text
All sections, questions and sources

Content reviewed： · Editor：Kai

Opening steps

Choose your environment or purpose to see its steps.

Inspect PHP source

Distinguish browser rendering from server execution.

  1. Open a copy in an editor.
  2. Inspect PHP tags, includes, requires and configuration references.
  3. Check README, Composer configuration and the document root.
Preview in a development environment

Use the documented environment for trusted code.

  1. Match PHP version, extensions and dependencies.
  2. Access through the documented local HTTP environment.
  3. Test forms and database connections with test data.
Diagnose execution errors

Inspect logs before exposing detailed errors publicly.

  1. Record the URL/action and inspect server logs.
  2. Distinguish syntax, version, extension, path and permission issues.
  3. Reproduce in a copied environment and verify the corrected behavior.

Menu labels and support vary by app, OS and version. Preserve the original before making changes.

Troubleshooting by symptom

  • Source displayed: verify that requests pass through a PHP-capable runtime.
  • Blank page/500: inspect private error logs for syntax/dependencies, not public debug output.
  • Connection failure: check database/configuration/paths without sharing credentials.
  • 404: inspect document root, URL and routing.
  • Write fails: inspect target location and web-process permissions.
  • Only CLI works: compare PHP version, settings and user with the web environment.

PHP → HTML output / environment migration

  1. Execute trusted code in a matching runtime and obtain the needed page output.
  2. Review output for private information and handle dynamic functions separately.
  3. Inspect rendered pages and identify dynamic functions that a static copy cannot preserve.

Renaming is not execution; static HTML does not preserve authentication or database logic.

Compare CLI and web configuration

Inspect the configuration of the failing environment; CLI and web PHP can use different versions/settings.

Example: a file URL and a configured local HTTP environment are different execution paths.

Source for these steps：Microsoft · PHP in Visual Studio Code / PHP Group · Command line usage

Retain source and rendered output separately

Saved HTML normally lacks PHP source/database; document dependencies, document root and secure configuration storage.

Source for these steps：Microsoft · PHP in Visual Studio Code / PHP Group · Command line usage

Related-format differences

Related-format differences
Format / methodRoleWhat to verify
PHPServer processingVersion/extensions
HTMLRendered documentA rendered result
CLI executionCommand workflowConfiguration differences

Handling and security

Source/configuration may contain credentials; do not execute unfamiliar PHP on a public server or expose backups/configuration.

Questions and answers

Will opening it in a browser execute PHP?

It must pass through a PHP-capable runtime.

Does renaming to HTML preserve the site?

Server-side processing is not retained.

Should detailed errors be public?

They can expose private data; inspect logs instead.

Why does double-clicking not run the website?

Web PHP returns server-processed output; a file URL does not provide that environment.

Do web and CLI share identical configuration?

Versions, configuration and users may differ; inspect the failing environment.

Format facts: name, steward and MIME type
Formal name
PHP source code
Steward / specification
PHP Group / code author
MIME type
Depends on the producer or server; an extension alone does not establish a MIME type.

Primary and official sources

  • Software documentationPHP in Visual Studio Code

    Reference for editing and validating PHP source.

    Microsoft · Link checked：
  • Project documentationCommand line usage

    Reference for PHP command-line execution.

    PHP Group · Link checked：