# pickle > A PHP extension installer based on Composer. > More information: . - Install a specific PHP extension: `pickle install {{extension_name}}` - Convert an existing PECL extension configuration to a Pickle configuration file: `pickle convert {{path/to/directory}}` - Validate a PECL extension: `pickle validate {{path/to/directory}}` - Package a PECL extension for release: `pickle release {{path/to/directory}}`