Undefined index error PHP

Question

I m new in PHP and I m getting this error      Notice  Undefined index  productid in  var www test modifyform php on   line 32      Notice  Undefined index  name in  var www test modifyform php on line   33      Notice  Undefined index  price in  var www test modifyform php on line   34      Notice  Undefined index  description in  var www test modifyform php   on line 35   I couldn t find any solution online  so maybe someone can help me   Here is the code    lt form action   lt  php echo   SERVER  PHP SELF     gt   method  POST  gt      lt input type  hidden  name  rowID  value   lt  php echo  rowID   gt   gt       lt p gt        Product ID  lt br   gt         lt input type  text  name  productid  size  8  maxlength  8  value   lt  php echo  productid   gt     gt      lt  p gt       lt p gt        Name  lt br   gt         lt input type  text  name  name  size  25  maxlength  25  value   lt  php echo  name   gt     gt      lt  p gt       lt p gt        Price  lt br   gt         lt input type  text  name  price  size  6  maxlength  6  value   lt  php echo  price   gt     gt      lt  p gt       lt p gt        Description  lt br   gt         lt textarea name  description  rows  5  cols  30  gt         lt  php echo  description   gt  lt  textarea gt      lt  p gt       lt p gt         lt input type  submit  name  submit  value  Submit     gt      lt  p gt      lt  form gt      lt  php    if  isset   POST  submit              rowID     POST  rowID           productid     POST  productid      this is line 32 and so on           name     POST  name           price     POST  price           description     POST  description         What I do after that  or at least I m trying  is to update a table in MySQL  I really can t understand why  rowID is defined while the other variables aren t   Thank you for taking your time to answer me  Cheers

User · Accepted Answer

Try    lt  php  if  isset   POST  name            name     POST  name       if  isset   POST  price            price     POST  price       if  isset   POST  description            description     POST  description         gt

User · Answer

This is happening because your PHP code is getting executed before the form gets posted    To avoid this wrap your PHP code in following if statement and it will handle the rest no need to set if statements for each variables         if isset   POST   amp  amp  array key exists  name of your submit input    POST                            process PHP Code                   else                          do nothing

User · Answer

To remove this error  in your html form you should do the following in enctype    lt form  enctype  multipart form-data  gt    The following down is the cause of that error i e if you start with form-data in enctype  so you should start with multipart    lt form enctype  form-data multipart  gt

User · Answer

If you are using wamp server   then i recommend you to use xampp server   you   i get this error in less than i minute but i resolved this by using  isset  function   and i get no error    and after that i remove  isset  function and i don t see any error   by the way i am using xampp server

User · Answer

TRY   lt  php     rowID  productid  name  price  description           if  isset   POST  submit              rowID     POST  rowID           productid     POST  productid      this is line 32 and so on           name     POST  name           price     POST  price           description     POST  description

User · Answer

Hey this is happening because u r trying to display value before assignnig it  U just fill in the values and submit form it will display correct output Or u can write ur php code below form tags It ll run without any errors

User · Answer

Apparently the index  productid  is missing from your html form  Inspect your html inputs first  eg  lt input type  text  name  productid  value    gt  But this will handle the current error PHP is raising       rowID   isset   POST  rowID        POST  rowID            productid   isset   POST  productid        POST  productid            name   isset   POST  name        POST  name            price   isset   POST  price        POST  price            description   isset   POST  description        POST  description

User · Answer

There should be the problem  when you generate the  lt form gt   I bet the variables  name   price are NULL or empty string when you echo them into the value of the  lt input gt  field  Empty input fields are not sent by the browser  so   POST will not have their keys   Anyway  you can check that with isset     Test variables with the following   if isset   POST  key        variable   POST  key      variable NULL  You better set it to NULL  because      NULL value represents a variable with no value

User · Answer

this error occurred sometime method attribute   valid passing method    Error option               method  get  but  called by   Fname     POST  name                                     or         method  post  but  called by   Fname     GET  name        More info visit http   www doordie co in index php

[php] Undefined index error PHP

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