.PHP5 File Extension

PHP Source Code File (version 5)

While you're correct in saying it "can be disabled in versions predating 5.3.0", the extension is compiled in by default as of PHP 5.0.0. So this makes sense for people using PHP 5.2 or lower. The SPL...

General Information

Title PHP5 File Extension
Extension .php5
Full Form PHP Source Code File (version 5)
File Type Source Code File
Developer The PHP Group
MIME Type text/x-php

File Function

Primary Function Server-side scripting
Additional Functions Web development, Data output
Features Script execution, Data processing

File Characteristics

Quality Depends on code
Supports Layers N/A
Supports Transparency N/A
Editable Yes

Use Cases

Web Development Yes
Server Scripting Yes
Data Processing Yes

Security and Practices

Security Risks Injection attacks, XSS
Best Practices Validation, Sanitization

Historical/Version Information

Initial Release 2004
Discontinued 2014 (PHP 5.0 - 5.6)

Associated Types

Similar Extensions .php, .phtml, .php4, .php7

Software Compatibility

Software Usage Policy OS Compatibility
Zend Server Paid, Free trial Windows, Mac, Linux, IBM i
XAMPP Free Windows, Mac, Linux
MAMP Free, Paid Windows, Mac