Undefined index warning in php+mysql

Question

Nikhil_4 0 Newbie Poster

9 Years Ago

This code is to create a simple database to insert records into a table ...
but the table appears to be empty with the following errors after entry>>

errors:
Notice: Undefined index: FirstName in C:\xampp\htdocs\my_php_files\insert.php on line 34

Notice: Undefined index: LastName in C:\xampp\htdocs\my_php_files\insert.php on line 35

Notice: Undefined index: Age in C:\xampp\htdocs\my_php_files\insert.php on line 36

 <?php

$con = mysqli_connect("localhost","root","distortion","my_databs");

// Check connection

if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}


// Create table

$sql = "CREATE TABLE IF NOT EXISTS Employee(PID INT NOT NULL AUTO_INCREMENT , 
                    FirstName    CHAR(30),
                    LastName     CHAR(30),
                    Age          INT(5),
                    PRIMARY KEY  (PID)
                    )";
echo " <br> ";

// Execute query

if (mysqli_query($con,$sql)) {
echo " Table Created Successfully ";
} else {
 echo " Error creating table: " . mysqli_error($con);
}


// escape variables for security

$firstname  = mysqli_real_escape_string($con, $_POST['FirstName']);
$lastname   = mysqli_real_escape_string($con, $_POST['LastName']);
$age        = mysqli_real_escape_string($con, $_POST['Age']);


$sql="INSERT INTO Employee (FirstName, LastName, Age ) 
       VALUES ('$firstname', '$lastname', '$age')";


  echo "<br>";
if (!mysqli_query($con,$sql)) {

 die( 'Error:' . mysqli_error($con));

 }
echo"<br>";
echo " -> 1 record added";



 // Display In A Table

 $result = mysqli_query( $con , " SELECT * FROM Employee " );

echo "<table border='5'> <tr> <th> PID       </th> <th> First Name </th> <th> Last Name  </th> <th> Age       </th> </tr>";



while($row = mysqli_fetch_array($result)) {
   echo "<tr>";

  echo "<td>" . $row['PID']       .  "</td>";
  echo "<td>" . $row['FirstName'] .  "</td>";
  echo "<td>" . $row['LastName']  .  "</td>";
  echo "<td>" . $row['Age']       .  "</td>";

 echo ("<td><a href=\"edit_form.php?id=$row[PID]\">Edit</a></td>");
 echo ("<td><a href=\"delete_form.php?id=$row[PID]\">Delete</a></td>");

 echo "</tr>";
 }  


 echo "</table>";


mysqli_close($con);

?>

php

Edited 9 Years Ago by Nikhil_4

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11 Replies
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Latest Post 9 Years Ago Latest Post by nadiam

All 11 Replies

rubberman 1,355 Nearly a Posting Virtuoso

9 Years Ago

Forget this - need to re-analyze the original code.

Edited 9 Years Ago by rubberman

urtrivedi 276 Nearly a Posting Virtuoso

9 Years Ago

Reasons:

1) Your html part is not having LastName , Age elements properlly spelled
2) Your input method may be GET instead of POST

nadiam 0 Posting Pro in Training

9 Years Ago

what urtivedi said.

this is for insert yes?

$firstname  = mysqli_real_escape_string($con, $_POST['FirstName']);
$lastname   = mysqli_real_escape_string($con, $_POST['LastName']);
$age        = mysqli_real_escape_string($con, $_POST['Age']);

but in you html:

<input type="text" name="firstname" /><br/> 
<input type="text" name="lastname" /><br/> 
<input type="text" name="age" /><br/>

you name are all small letters. they should be FirstName LastName and Age or you change the insert to small letters.

as in:

$firstname  = mysqli_real_escape_string($con, $_POST['firstname']);
$lastname   = mysqli_real_escape_string($con, $_POST['lastname']);
$age        = mysqli_real_escape_string($con, $_POST['age']);

also he mentioned ur form tags. make sure all input is in between the same
<form> </form>
meaning the input for first name, last name and age AND the save button.

technically right now you have this

<form>
    <input type="text" name="firstname" /><br/> 
    <input type="text" name="lastname" /><br/> 
    <input type="text" name="age" /><br/>
</form>

<form>
    <input type="submit" name="save" value="Save">
</form>

When it should be:

<form method="post" action="insert.php">
    <input type="text" name="firstname" /><br/> 
    <input type="text" name="lastname" /><br/> 
    <input type="text" name="age" /><br/>
    <input type="submit" name="save" value="Save">
</form>

also use PDO. i feel kinda weird saying that coz i was told that a million times on forums before i actually did migrate to pdo. it may look confusing and all but u will get the hang of it soon. and i actually find it much easier than mysql_/mysqli_ functions.

Edited 9 Years Ago by nadiam

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Nikhil_4 0 Newbie Poster · Answer 1 · 2014-07-01T04:50:02+00:00

Nikhil_4 0 Newbie Poster

9 Years Ago

@urtrivedi may i know which line is mispelled.

urtrivedi 276 Nearly a Posting Virtuoso · Answer 2 · 2014-07-01T04:51:42+00:00

urtrivedi 276 Nearly a Posting Virtuoso

9 Years Ago

Post your html code also

Nikhil_4 0 Newbie Poster · Answer 3 · 2014-07-01T05:01:55+00:00

<!DOCTYPE html>
<html>
<body>
<style>
.error {color: #FF0000;}
form label{
display: inline-block;

</style>


 <div id= "container" style "width:500px">
< div  style="background:#80BFFF">
<div id="header" style="background-color:#FFA500;">
 <h1 style="margin-bottom:0;">
 <h1  style="text-align:center;"><u>Employee Details</u></h1></h1></div>

<p><span class = "error">* Required Field. </span></p>
 <form action="insert.php" method="post">
<h3 style="text-align:center;">

<label for="Firstname">First Name:</label>      <input type="text"     name="firstname" /><br/> 
<label for="Lastname">Last Name:</label>        <input type="text" name="lastname" /><br/> 
<label for="Age">Age:</label>                   <input type="text" name="age" /><br/>
<br class="clear" />
</form>

<br>  <form action="insert.php" method = "post">
    <input type="submit" value = "Save">
  </form>
  <form action= "Menu.php" method= "POST">
  <input type ="submit" value = "Cancel">
  </form>

<br>

 <form action= "delete.php" method= "POST">
<br><input type ="submit" value = "Delete All Records">
 </form></h3>



 </div>
</body>
 </html>

urtrivedi 276 Nearly a Posting Virtuoso · Answer 4 · 2014-07-01T05:07:01+00:00

if you see line 22, 23, 24

all input names are in small letters
firstname
lastname
age

and in your php handler code in your first post its in title case. Line 33,34,35

Firstname
Lastmame
Age

Both case must match as php is case sensitive like C language

Nikhil_4 0 Newbie Poster · Answer 5 · 2014-07-01T05:10:19+00:00

I'm sorry .. but i'm getting the same error as before

Nikhil_4 0 Newbie Poster · Answer 6 · 2014-07-01T05:40:31+00:00

Nikhil_4 0 Newbie Poster

9 Years Ago

i'm afraid im getting the same error

urtrivedi 276 Nearly a Posting Virtuoso · Answer 7 · 2014-07-01T05:50:06+00:00

remove line 26 to 28 in your html code, your html elements and submit button must be under same form element. You have ended form early

</form>

<br>  <form action="insert.php" method = "post">

Your insert form must look like following

<form action="insert.php" method="post">
<h3 style="text-align:center;">

<label for="Firstname">First Name:</label>      <input type="text"     name="Firstname" /><br/> 
<label for="Lastname">Last Name:</label>        <input type="text" name="Lastname" /><br/> 
<label for="Age">Age:</label>                   <input type="text" name="Age" /><br/>
<br class="clear" />

<input type="submit" value = "Save">
  </form>

Nikhil_4 0 Newbie Poster · Answer 8 · 2014-07-01T06:23:51+00:00

nothing seems to work..
i dont think it has anything to do with the HTML code.

Undefined index warning in php+mysql

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