in fact you modify values from a db property
[root@nethserver-dev ~]# config show php
php=configuration
AllowUrlFopen=1
DateTimezone=UTC
ExposePhp=0
MaxExecutionTime=30
MemoryLimit=32
PostMaxSize=8
ShortOpenTag=0
UploadMaxFilesize=2
or it is the same
[root@nethserver-dev ~]# db configuration show php
php=configuration
AllowUrlFopen=1
DateTimezone=UTC
ExposePhp=0
MaxExecutionTime=30
MemoryLimit=32
PostMaxSize=8
ShortOpenTag=0
UploadMaxFilesize=2
since you want to modify it (32=32MB)
config setprop php UploadMaxFilesize 32
signal-event nethserver-php-update
or
db configuration setprop php UploadMaxFilesize 32
signal-event nethserver-php-update
the signal-event is a mandatory to rewrite all configuration files
you have a pointer in the grand mother website of neth, it could be nice that someone of the documentation team rewrite here (I’m one of the authors)