php - Is it possible to pass an unset variable to a function or otherwise validate forms without isset()? -

-

i've got project passes json between frontend , backend. so, frontend php generate statement { "command" : "getuser", "parameters" : { "userid" : 1 } } , send backend. backend executes

if ($command == 'getuser') {   validate($parameters['userid']);   if ($this->valid) { <<get user>> } }

validate checks variable , sets $this->valid. creates error message if necessary. want create error message in case front end passes in { "command" : "getuser", "parameters" : "" }. in case, $parameters['userid'] never set, , validate() complain passed unset variable.

i've come 2 solutions. first solution set $parameters['userid'] = "unset" before loading in json, , check in validator. other solution use 

if (isset($parameters['userid'])) {    validate($parameters['userid']); }  else {    echo("error"); }

it'd nice if validate() figure out on own whether or not variable there. there more elegant way should doing things?

in short, no. error happens as, rather after, validate() called there no way intercept that.

it sounds better solution have validateuser() function passed in whole $parameters variable check you're looking against 'user_id'. allows to further separate concerns (validation, versus response).


Comments

Post a Comment

Popular posts from this blog

Javascript line number mapping -

-
magically formatted comments change reported line number of javascript errors in browsers; this: //@line n "f" n line number , f file name. unfortunately, //@line appears ungoogleable. know there documentation on feature, , browsers support it? (i found references here , here .) from can find available in mozilla based browsers. it using js_setoptions command can turn these options on or off depending on values passed. https://developer.mozilla.org/en/js_setoptions
Read more

c# - Is it possible to remove an existing registration from Autofac container builder? -

-
something along lines: builder.registertype<mytype>().as<itype>(); builder.registertype<mytype2>().as<itype>(); builder.deregistertype<mytype>().as<itype>() var container = builder.build(); var types = container.resolve<ienumerable<itype>>(); assert.istrue(types.count == 1); assert.istrue(types[0].gettype == typeof(mytype2)); scenario: go through bunch of assemblies , go register types want make sure have 1 implementation of given type. need before create container. track on own nice if autofac me bit. this cannot done directly using containerbuilder , unless start on new one. mind you, having first built container should able construct new container filtering away unwanted types , reusing registrations first container. this: ... var container = builder.build(); builder = new containerbuilder(); var components = container.componentregistry.registrations .where(cr => cr.activator.limittype != typ...
Read more

php - Mysql PK and FK char(36) vs int(10) -

-
i have read mysql can handle indexes , searches better if tables keys integers rather char(36) uuid's. is worth converting int(10)? note: use 1 server , have have plans use multiple databases concurrently therefore removing 1 of big reasons using uuid. our tables innodb if makes difference. thanks in advance. usually rdbms can handle integer keys pk more efficient, other datatypes. reason how build index column, yes: long dont require string (or other typed) keys, should use integers. however: char(36) , int(10) far away being equal, because int(10) much smaller, char(36). dont know, if require many different keys, should keep in mind. update, complete last paragraph: int(10) 32-bit, char(36) 36 - ^byte^ (= 288-bit). not mean, int consumes less space, means, char(36) has 4 times more different keys.
Read more