can anyone tell me what is Undefined index error mean if i have this simple code
PHP Code:
<?php
//defining the databse
define("DB_SERVER", "localhost");
define("DB_USER", "root");
define("DB_NAME", "rms");
//connecting to that database
$connection = mysql_connect(DB_SERVER,DB_USER)
or die('error were found while connection to the db ' . mysql_error()) ;
//selectin the database
$db_select = mysql_select_db(DB_NAME , $connection)
or die('error were found while selecting the database ' .mysql_error()) ;
?>
<?php
$first_name = $_POST['f_name'];
$last_name = $_POST['l_name'];
$sex = $_POST['sex'];
$city = $_POST['city'];
?>
<?php
$processing = mysql_query("INSERT INTO form( first_name,last_name,sex,city )
VALUES('{$first_name}','{$last_name}','{$sex}','{$city}'");
if($processing){
echo "you information was successfully created to our database if you want to see the list of our members click here" ;
}else{
echo "adding your informaion have been failed .Try Again";
}
?>
<title>Form</title>
<form action="index.php" method="post">
<h2>Please fill this form to add your information to our database</h2>
<label> Frist Name: <input type="text" name="f_name"></label><br /><br />
<label> Last Name: <input type="text" name="l_name"></label><br /><br />
<label> Sex: <input type="text" name="sex"></label><br /><br />
<label> city: <input type="text" name="city"></label><br /><br />
<input type="submit" name="submit" value="add">
</form>
this is very simple im just kinda doing a test for me. and there is a four froms that going to put information to the database it's very simple
what can i do to make it exists?
isn't the name of the 4 inputs makeing it exists
Yes, but only when the form has already been submitted, so you'll get those errors when first loading the form. Just put array_key_exists('submit', $_POST) in an if statement surrounding the whole query & $_POST block.
You could also check to see if the form was submitted by using
isset($_POST['submit']) in an if statement wrapped around the whole php code. Works pretty much the same way as 46bit's method.
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