The document is a user guide for the IBM Ported Tools for z/OS: PHP for z/OS feature, outlining setup, installation, and usage instructions for system programmers familiar with z/OS systems. It covers topics such as installing PHP, considerations for porting scripts, PHP application development with z/OS DB2, and includes references to related publications and support resources. Additionally, it provides information on using tools like LookAt and IBM Health Checker for z/OS to optimize PHP applications on the platform.