> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/server-management/deployment/installing-community-server/troubleshooting-installation-issues/installation-issues-with-php5.md).

# Installation Issues with PHP5

Addresses compatibility issues between MariaDB and older PHP5 client libraries, specifically regarding header and library version mismatches.