1 min read
Two PHP settings govern uploads: upload_max_filesize (the largest single file allowed) and post_max_size (the largest entire request allowed). A file is only as uploadable as the smaller of the two, and since every upload request carries form fields and overhead, post_max_size must be larger than or equal to upload_max_filesize. When it isn’t, large files fail even though they look allowed.
UPLOAD_LIMITS (warning): post_max_size is smaller than upload_max_filesize. Large uploads will fail with a size error.
| Scenario | What happens |
|---|---|
| Media library uploads | Files between the two limits are rejected (“exceeds maximum upload size”) |
| PDFs & large documents | Client documents fail to attach |
AI1WP .wpress files |
Migration/backup files are large by design and get refused |
| Form file uploads | Fluent Forms file fields fail on big attachments |
Set post_max_size to at least upload_max_filesize: on Xponent’s standard, both are 512M.
ini
upload_max_filesize = 512M
post_max_size = 512MUpload the file that previously failed. If it succeeds, both settings are aligned.
Xponent-managed sites run both at 512M: generous enough for large media and migration files, with post_max_size never the bottleneck.
