WP-CLI Breaks on Shared Hosting—Here's What Four Real Servers Revealed

WordPress administrators relying on WP-CLI for automation face a critical issue: the standard installation method fails unpredictably on shared hosting, with failure modes varying by provider. This investigation maps the architectural differences—PATH configuration, PHP location, shell type, and permission models—that determine whether WP-CLI succeeds or fails. Understanding these gaps provides developers with actionable diagnostics to deploy WP-CLI reliably across the shared hosting landscape.