What the symptom means
A blank page can accompany a PHP failure, but the appearance alone is not a diagnosis. Check whether the public site, admin area or both are affected.
Before changing anything
Create or verify a restorable file and database backup. Record recent plugin, theme, PHP or configuration changes. Use staging when available.
Find the error
Read the host’s PHP error logs for the affected request. WordPress debugging can log useful details, but public error display can reveal sensitive paths and data. If enabling WP_DEBUG on staging, configure WP_DEBUG_LOG deliberately and WP_DEBUG_DISPLAY as false; secure any log file and remove it after diagnosis.
Recover in small steps
If the log identifies a recently updated plugin, use the WordPress recovery mechanism or hosting tools to disable only that plugin, then retest. A theme or server compatibility error requires its own targeted fix. Avoid deleting plugin folders or modifying database values blindly.
When to ask your host
Ask for help if you cannot access backups or logs, or if the failure involves PHP configuration. Once recovered, turn off temporary debugging and verify the public site, admin area and critical forms.