[lacatoire]

• pg_lo_write() referred to a nonexistent $buf parameter; it is $data.
• pg_lo_read() is the only check worded "greater or equal than"; use "greater than or equal to" like the rest of the file.

Before:

pg_lo_write(): Argument #3 ($length) must be less than or equal to the length of argument #2 ($buf)
pg_lo_read(): Argument #2 ($length) must be greater or equal than 0

After:

pg_lo_write(): Argument #3 ($length) must be less than or equal to the length of argument #2 ($data)
pg_lo_read(): Argument #2 ($length) must be greater than or equal to 0

[iliaal]

LGTM. The pg_lo_write() case is already covered by pg_lo_write_null_bytes.phpt; the pg_lo_read() check could move there instead of a new file.

[kocsismate]

Approved once Ilia's comment is addressed