php - Drop Down Executes Query On Post? - php

Question

I've looked online and most drop down tutorials are for ratings e.g. matching the drop down value with a rating. I need to execute a query which corresponds to a number in the dropdown and the results to display once a user clicks submit, I don't want to use javascript. In my HTML :
<form action="" method="post" enctype="multipart/form-data" name="form1" id="genericForm">
<fieldset>
<p>Filter Rating</p>
<select name="value">
<option value="1">One Star</option>
<option value="2">Two Stars</option>
<option value="3">Three Stars</option>
<option value="4">Four Stars</option>
<option value="5">Five Stars</option>
</select>
</div>
<input type="submit" name="Submit" value="Submit"><br />
</form>
The php :
<?php
$Link = mysql_connect($Host, $User, $Password);
if($_POST['value'] == '1') {
// query to get all 1 star ratings
$query = "SELECT * FROM films WHERE genre='action' AND rating='1'";
}
elseif($_POST['value'] == '2') {
// query to get all 2 star ratings
$query = "SELECT * FROM films WHERE genre='action' AND rating='2'";
}
elseif($_POST['value'] == '3') {
// query to get all 3 star ratings
$query = "SELECT * FROM films WHERE genre='action' AND rating='3'";
}
elseif($_POST['value'] == '4') {
// query to get all 4 star ratings
$query = "SELECT * FROM films WHERE genre='action' AND rating='4'";
}
elseif($_POST['value'] == '5') {
// query to get all 5 star ratings
$query = "SELECT * FROM films WHERE genre='action' AND rating='5'";
}
WHILE($board = mysql_fetch_array($result)):
$title = $board['title'];
$studio = $board['studio'];
$language = $board['language'];
$certification = $board['certification'];
echo '
Title : '.$title.'<br />
Studio : '.$studio.'<br />
Language : '.$language.'<br />
Certification : '.$certification.'<br />
;
endwhile;
?>

Answer 1

Try it this way, assuming you're already connected and have selected DB and that you're using your entire code inside the same file, since you are using action=""; this denotes executing as "self".
You also are not executing mysql_query() which I have added below.
Be sure to change xxx below with your DB credentials and your_db to your database's name.
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
$Host = "xxx";
$User = "xxx";
$Password = "xxx";
$Link = mysql_connect($Host, $User, $Password);
$db_selected = mysql_select_db('your_db', $Link);
if (!$db_selected) {
die ('Can\'t use that DB : ' . mysql_error());
}
if(isset($_POST['Submit'])){
if($_POST['value'] == '1') {
// query to get all 1 star ratings
$query = mysql_query("SELECT * FROM films WHERE genre='action' AND rating='1'");
}
elseif($_POST['value'] == '2') {
// query to get all 2 star ratings
$query = mysql_query("SELECT * FROM films WHERE genre='action' AND rating='2'");
}
elseif($_POST['value'] == '3') {
// query to get all 3 star ratings
$query = mysql_query("SELECT * FROM films WHERE genre='action' AND rating='3'");
}
elseif($_POST['value'] == '4') {
// query to get all 4 star ratings
$query = mysql_query("SELECT * FROM films WHERE genre='action' AND rating='4'");
}
elseif($_POST['value'] == '5') {
// query to get all 5 star ratings
$query = mysql_query("SELECT * FROM films WHERE genre='action' AND rating='5'");
}
WHILE($board = mysql_fetch_array($query)){
$title = $board['title'];
$studio = $board['studio'];
$language = $board['language'];
$certification = $board['certification'];
echo '
Title : '.$title.'<br />
Studio : '.$studio.'<br />
Language : '.$language.'<br />
Certification : '.$certification.'<br />';
}
} // brace for if(isset($_POST['Submit']))
?>
</div>
<form action="" method="post" enctype="multipart/form-data" name="form1" id="genericForm">
<fieldset>
<p>Filter Rating</p>
<select name="value">
<option value="1">One Star</option>
<option value="2">Two Stars</option>
<option value="3">Three Stars</option>
<option value="4">Four Stars</option>
<option value="5">Five Stars</option>
</select>
</div>
<input type="submit" name="Submit" value="Submit"><br />
</form>
Note:
This enctype="multipart/form-data" isn't required if it's not going to be used to upload files.

Answer 2

If im not mistaken this is what you want? you just need to loop through the row in the tables and fetch it.
<div class="form">
<?php
$Link = mysql_connect($Host, $User, $Password);
$Query = "select * from books where product = 'hannibal' AND book = '1'";
$result = mysql_query($Query);
while ($row = mysql_fetch_array($result)) {
$subject = $row['subject'];
$username = $row['username'];
$date = $row['date'];
$comments = $row['comments'];
?>
<h1>Subject : <?php echo $subject;?>
Posted by <?php echo $username;?> on <?php echo $date;?></h1><br />
<?php echo $comments;?>'; <br />
<?php
}
?>
</div>