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PHP 5.1 Installation

Explore PHP 5.1

This version is no longer officially supported.

Official support refers to that provided direct by the PHP Project.

If you install PHP via third-party packages, support timelines may be different. Please read the Release Support Policy for more information.

Debian Linux

Install using the APT package manager.
Ubuntu Linux

Install using the APT package manager.
Windows ZIP Archive

Official PHP runtimes for Windows, compiled against various versions of Visual Studio.