Codeigniter unset session

Question

Hi I have a site develop in CodeIgniter   In one of my page I m using pagination of CodeIgniter after a search form   In this case I store into my session the search value passed by   POST because if I have more result clicking the next page the search keppe the searching value   But when I change page for example I want to return to the index and after return to my search form page the session is already created and make the query with the value of the session  How can I destroy or unset the value of the session when I change page  Is this possible   Into my model function I check if the session value is different from 0 and exist  if true I make a query with the session value   This is my controller  nation is the value to store into the session   public function region list             this- gt load- gt model  backend Nation model             this- gt load- gt library  pagination             if   POST                        if  isset   POST  ricerca                        nation    this- gt input- gt post  nation                    if strlen  nation   gt  0                       this- gt session- gt set userdata  nation   nation                                       config   array                     config  base url     base url      index php backend region region list                    config  total rows      this- gt Region model- gt countRegionSearch                     config  per page     10                   config  uri segment     4                    this- gt pagination- gt initialize  config                     page     this- gt uri- gt segment 4      this- gt uri- gt segment 4    0                   data  regionlist      this- gt Region model- gt regionSearch  config  per page     page                    data  links      this- gt pagination- gt create links                     data  nationlist      this- gt Nation model- gt nationList                      this- gt load- gt view  backend region list view   data                                   else                        config   array                 config  base url     base url      index php backend region region list                config  total rows      this- gt Region model- gt countRegion                 config  per page     10               config  uri segment     4                this- gt pagination- gt initialize  config                 page     this- gt uri- gt segment 4      this- gt uri- gt segment 4    0               data  links      this- gt pagination- gt create links                 data  regionlist      this- gt Region model- gt regionList  config  per page     page                data  nationlist      this- gt Nation model- gt nationList                  this- gt load- gt view  backend region list view   data                     and this is my model to search   function regionList  limit null   start null             nation id    this- gt session- gt userdata  nation            if   this- gt session- gt userdata  language     it                this- gt db- gt select  region id  region name it as name nation id as nation id  nation name it as nation name            if   this- gt session- gt userdata  language     en                this- gt db- gt select  region id  region name en as name nation id as nation id  nation name en as nation name             this- gt db- gt from  region             this- gt db- gt join  nation    region nation id   nation id   left            if  isset  nation id   amp  amp   nation id  0                this- gt db- gt where  region nation id    nation id            this- gt db- gt order by  name    asc             this- gt db- gt limit  limit   start            query    this- gt db- gt get             region   array            foreach   query- gt result   as  row              array push  region   row            return  region                  function countRegion              nation id    this- gt session- gt userdata  nation            if   this- gt session- gt userdata  language     it                this- gt db- gt select  region id  region name it as name nation id as nation id  nation name it as nation name            if   this- gt session- gt userdata  language     en                this- gt db- gt select  region id  region name en as name nation id as nation id  nation name en as nation name             this- gt db- gt from  region             this- gt db- gt join  nation    region nation id   nation id   left            if  isset  nation id   amp  amp   nation id  0                this- gt db- gt where  region nation id    nation id            this- gt db- gt order by  name    asc             query    this- gt db- gt get            return  query- gt num rows                 public function regionSearch  limit null   start null            nation id    this- gt session- gt userdata  nation            if   this- gt session- gt userdata  language     it                 this- gt db- gt select    region id  region name it as name nation id as nation id  nation name it as nation name                if  this- gt input- gt post  name                         this- gt db- gt where  region name it LIKE      this- gt input- gt post  name                             if   this- gt session- gt userdata  language     en                 this- gt db- gt select    region id  region name en as name nation id as nation id  nation name en as nation name                if  this- gt input- gt post  name                         this- gt db- gt where  region name en LIKE      this- gt input- gt post  name                             this- gt db- gt from  region             this- gt db- gt join  nation    region nation id   nation id   left            if  isset  nation id   amp  amp   nation id  0                this- gt db- gt where  region nation id    nation id            this- gt db- gt order by  name    asc             this- gt db- gt limit  limit   start            query    this- gt db- gt get             region   array            foreach   query- gt result   as  row              array push  region   row            return  region                public function countRegionSearch             nation id    this- gt session- gt userdata  nation            if   this- gt session- gt userdata  language     it                 this- gt db- gt select    region id  region name it as name nation id as nation id  nation name it as nation name                if  this- gt input- gt post  name                         this- gt db- gt where  region name it LIKE      this- gt input- gt post  name                             if   this- gt session- gt userdata  language     en                 this- gt db- gt select    region id  region name en as name nation id as nation id  nation name en as nation name                if  this- gt input- gt post  name                         this- gt db- gt where  region name en LIKE      this- gt input- gt post  name                             this- gt db- gt from  region             this- gt db- gt join  nation    region nation id   nation id   left            if  isset  nation id   amp  amp   nation id  0                this- gt db- gt where  region nation id    nation id            this- gt db- gt order by  name    asc              query    this- gt db- gt get            return  query- gt num rows

User · Answer

session data   array  username    gt  shashikant     this- gt session- gt set userdata  logged in    session data     this- gt session- gt unset userdata  logged in

User · Answer

I use the old PHP way  It unsets all session variables and doesn t require to specify each one of them in an array  And after unsetting the variables we destroy the session   session unset    session destroy

User · Answer

I use the old PHP way  It unsets all session variables and doesn t require to specify each one of them in an array  And after unsetting the variables we destroy the session

User · Answer

Instead of use set userdata you should use set flashdata   According to CI user guide      CodeIgniter supports  flashdata   or session data that will only be available for the next server request  and are then automatically cleared  These can be very useful  and are typically used for informational or status messages  for example   record 2 deleted      http   ellislab com codeigniter user-guide libraries sessions html

User · Answer

answering to your question      How can I destroy or unset the value of the session    I can help you by this    this- gt session- gt unset userdata  some name      and for multiple data you can    array items   array  username    gt       email    gt         this- gt session- gt unset userdata  array items     and to destroy the session    this- gt session- gt sess destroy      Now for the on page change part   on the top of my mind       you can set the config  anchor class  of the paginator equal to the classname you want    after that just check it with jquery onclick for that class which will send a head up to the controller function that will unset the user session

User · Answer

this- gt session- gt unset userdata  session value

[php] Codeigniter unset session

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