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PHP (HyperText PreProcessor) script with PHP version 4 code
File type: Internet related file, Source code and script file
A php4 file extension is associated with the HTML page with PHP (PHP HyperText PreProcessor) version 4 format.
File type category:
Internet related file
Source code and script file
Date updated: June 27, 2025
The php4 file extension is related to the HTML page with PHP (HyperText PreProcessor).
PHP is a widely used general-purpose server scripting language that is especially suited for Web development and can be embedded into HTML.
.php4 refers to the old version 4 of the PHP scripting language. However, almost all PHP files use only the .php file extension for all versions.
PHP version 4 is ancient and not supported in these days
Use PHP editor, specialised development tools like Zend Studio, VS code, PHP Storm. To open a webpage on the Internet, use a web browser (Internet Explorer, Firefox).
PHP can be translated into other programming languages or run on newer PHP engine versions. To do so, change the .php4 file extension to .php. If the code is compatible with newer versions of PHP, it will work normally on the web server.
Software applications that can open php4 files:
Microsoft Windows
Multiplatform
Software applications that can edit php4 files:
Microsoft Windows
Multiplatform
Software capable of saving php4 files:
Microsoft Windows
Multiplatform
Programs for viewing php4 files:
Microsoft Windows
Software applications that handle other tasks involving php4 files:
Multiplatform
Language
