php appending array -


ok have changed code more have suggested, actual append still not happen. changes single value in array new value being passed in instead of actual append.

if(isset($_post['addtag']) && isset($_post['tagname'])) {   if(isset($_post['tags']))   {     $_post['tags'][] = $_post['tagname'];   }   else   {     $_post['tags'] = array($_post['tagname']);   } }

the reason check see if 'tags' variable has been set because there's no guarantee array yet don't take chance of using 1 until initialize array value.

here's happens:
1. visit page first time.
2. add tag ('tag1')
3. page refreshes , reflects 'tags' variable has size of 1 , displays 'tag1'
4. add tag ('tag2')
5. page refreshes , reflects 'tags' variable has size of 1 , displays 'tag2'

"refreshes" because term know specifies action of form points page located on.

regarding update:

$_post not persistent between request. contain values html pages sends server. long don't send list of every created tag in each request, $_post['tags'] empty.

i think want session.

you should read form handling in php.

the thing have is:

$appendedtags = $_post['tags']; $appendedtags[] = $_post['tagname'];

or if want use $_post['tags'] in further processing (which shouldn't, think have false concept of $_post in head (because write in comment post out.... mean?)):

$_post['tags'][] = $_post['tagname'];

some remarks on code:

  • in php, don't have initialise length of array. can add many elements want. can think of list or table.

  • your for loop copies values 1 array another. can achieve same assigning array contained in $_post['tags'] new variable.

  • if don't specify index, next highest index chosen new value.

you should read arrays in php.


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