Undefined index Error Post Php function argument

Question

I am very new to php doing this login form. created a file client.txt has a text "client"

after when i run the code i get

"Notice: Undefined index: password in C:\xampp\htdocs\mateen\aPanel\userform.php on line 17" ERROR

I could not able to understand where i am doing wrong.

<?php

    function isPassword($thePassword){
        $fp = fopen('datafile/client.txt', 'r');
        $code = fgets($fp);
        echo $code;
        fclose($fp);
        if(trim($code)==trim($thePassword)){
            return true;
        }else{
            return false;
        }
    }



    if(isPassword($_POST['password'])){
        session_start();
        $_SESSION['SESS_CLIENT'] = 1;   
    }else{
        session_start();
        $_SESSION['SESS_CLIENT'] = 0;   
    }


    //header("location:../index.php");
?>

`Notice: Undefined index: password` means the `$_POST` array does not have index password — Umair Ayub, Apr 17 '15 at 10:13

score 2 · Answer 1 · edited Apr 17 '15 at 10:40

2

You have to make sure that your form field that used to submit password has the attribute name "password"

ie <input type="password" name="password">

try it but this time use:

if(isset($_POST['password']) && isPassword($_POST['password'])){

edited Apr 17 '15 at 10:40

divyanshm

6,600
7
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answered Apr 17 '15 at 10:13

Yethroy Jerome

21
4

`attribute name = "password"` – Umair Ayub Apr 17 '15 at 10:14

score 1 · Answer 2 · answered Apr 17 '15 at 10:13

1

Change if(isPassword($_POST['password'])){

to

 if(isset($_POST['password']) && isPassword($_POST['password'])){

That notice simply tells you that $_POST doesn't have "password" as an index. If you don't submit a form, it's normal.

answered Apr 17 '15 at 10:13

Raphaël Gonçalves

146
4

Yuva Raj · Answer 3 · 2015-04-17T10:25:20.367

"Notice: Undefined index: password in C:\xampp\htdocs\mateen\aPanel\userform.php on line 17" ERROR

That means, you didn't set name attribute to that input type or you might have someother name.

Since you didn't posted your html file, i can't exactly tell where you made mistake. But, generally it should be,

Password : <input type="password" name="password" />

& in php file you should check it's empty or not and whether variable password is set or not by,

if(isset($_POST['password']) && !empty($_POST["password"]))
  {  

   }

NOTE : Your form method should be POST.

score 0 · Accepted Answer · answered Apr 17 '15 at 10:22

0

Add a check empty data and index-

if(!empty($_POST['password']) && isPassword($_POST['password'])){....

answered Apr 17 '15 at 10:22

Sougata Bose

31,517
8
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Undefined index Error Post Php function argument

4 Answers4