get the selected index value of select tag in php

Question

I was trying  to get the selected value from the  lt select gt  tag in PHP  but I get errors    These is what I have done   HTML   lt select name  gender  gt   lt option value  select  gt   Select  lt  option gt   lt option value  male  gt     Male    lt  option gt   lt option value  female  gt   Female  lt  option gt   lt  select gt    PHP script   Gender      POST  gender      but i get these error  Notice  Undefined index  gender in C  xampp htdocs omnama signup php on line 7   php script   Gender    isset   POST  gender       it returns a empty string   why     HTML    lt form name  signup form   action    signup php  onsubmit  return validateForm      method  post  gt   lt table gt      lt tr gt   lt td gt  First Name     lt  td gt  lt td gt   lt input type  text  name  fname  size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Last Name      lt  td gt  lt td gt   lt input type  text  name  lname  size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Your Email     lt  td gt  lt td gt   lt input type  text  name  email  size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Re-type Email  lt  td gt  lt td gt   lt input type  text  name  remail size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Password       lt  td gt  lt td gt   lt input type  password  name  paswod  size 10  gt   lt  td gt  lt  tr gt     lt tr gt   lt td gt  Gender         lt  td gt  lt td gt   lt select name  gender  gt     lt option gt                 Select  lt  option gt         lt option value  male  gt    Male    lt  option gt     lt option value  female  gt  Female  lt  option gt  lt  select gt  lt  td gt  lt  tr gt      lt tr gt   lt td gt   lt input type  submit  value  Sign up  id  signup   gt   lt  td gt   lt  tr gt    lt  table gt    lt  form gt    This is my php script     lt  php    con       mysql connect  localhost   root          fname       POST  fname       lname       POST  lname       email        POST  email       paswod      POST  paswod       Gender      POST  gender      mysql select db  homepage       if mysql num rows mysql query  SELECT Email FROM users WHERE Email     email    con          echo  userid is already there         else         sql   INSERT INTO users  FirstName  LastName Email Password Gender    VALUES      fname    lname    email    paswod    Gender        if   mysql query  sql  con         die  Error      mysql error           echo  created          gt     Please help me with these  I have to get the selected index value in the PHP    I have read this link to use  lt select gt  tag in PHP

User · Answer

gender     POST  gender    echo  gender      it will echoes the selected value

User · Answer

Your form is valid  Only thing that comes to my mind is  after seeing your full html  is that you re passing your  default  value  which is not set   instead of selecting something  Try as suggested by  Vina in the comment  i e  giving it a selected option  or writing a default value   lt select name  gender  gt   lt option value  default  gt Select  lt  option gt       lt option value  male  gt    Male    lt  option gt   lt option value  female  gt  Female  lt  option gt   lt  select gt    OR   lt select name  gender  gt   lt option value  male  selected  selected  gt    Male    lt  option gt   lt option value  female  gt  Female  lt  option gt   lt  select gt    When you get your   POST vars  check for them being set  you can assign a default value  or just an empty string in case they re not there   Most important thing  AVOID SQL INJECTIONS           fname     isset   POST  fname      mysql real escape string   POST  fname           lname     isset   POST  lname      mysql real escape string   POST  lname           email     isset   POST  email      mysql real escape string   POST  email          you might also want to validate e-mail  if  mail   filter var   POST  email    FILTER VALIDATE EMAIL        email   mysql real escape string   POST  email       else       die   invalid email address         or whatever  a default value   email          paswod    isset   POST  paswod      mysql real escape string   POST  paswod           gender    isset   POST  gender      mysql real escape string   POST  gender            query   mysql query  SELECT Email FROM users WHERE Email       email       if mysql num rows  query  gt  0      echo  userid is already there     else     sql    INSERT INTO users  FirstName  LastName  Email  Password  Gender           VALUES      fname        lname        email       paswod        gender        res   mysql query  sql  or die  Error   mysql error     echo  created

User · Answer

As you said     Gender    isset   POST  gender       it returns a empty string    because  you haven t mention method type either use POST or GET  by default it will use GET method  On the other side  you are trying to retrieve your value by using POST method  but in the form you haven t mentioned POST method  Which means miss-match method will result for empty   Try this code      lt form name  signup form   action    signup php  onsubmit  return validateForm      method  post  gt   lt table gt      lt tr gt   lt td gt  First Name     lt  td gt  lt td gt   lt input type  text  name  fname  size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Last Name      lt  td gt  lt td gt   lt input type  text  name  lname  size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Your Email     lt  td gt  lt td gt   lt input type  text  name  email  size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Re-type Email  lt  td gt  lt td gt   lt input type  text  name  remail size 10  gt  lt  td gt  lt  tr gt     lt tr gt   lt td gt  Password       lt  td gt  lt td gt   lt input type  password  name  paswod  size 10  gt   lt  td gt  lt  tr gt     lt tr gt   lt td gt  Gender         lt  td gt  lt td gt   lt select name  gender  gt     lt option value  select  gt                 Select  lt  option gt         lt option value  male  gt    Male    lt  option gt     lt option value  female  gt  Female  lt  option gt  lt  select gt  lt  td gt  lt  tr gt      lt tr gt   lt td gt   lt input type  submit  value  Sign up  id  signup   gt   lt  td gt   lt  tr gt    lt  table gt    lt  form gt    and on signup page   Gender      POST  gender      i m sure   now  you will get the value

[php] get the selected index value of <select> tag in php

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