How do I set a variable to $_GET
Question
I don't have a lot of experience with this... Help is greatly appreciated.
$id = $_GET["categoryID"]; isn't setting the variable.
$_GET["categoryID"] is returning the value, but the variable isn't being set.
I can set the variable by using $id=3; however $id = $_GET["categoryID"]; doesn't work.
<?php
if (@$_REQUEST['ajax']) {
$link = $nm3;
if ($link == false)
trigger_error('Connect failed - ' . mysql_error(), E_USER_ERROR);
$connected = mysql_select_db('dgp', $link);
if ($connected) {
$id = $_GET["categoryID"];
$results = mysql_query('select * from selectMenu where categoryID= \'' . $id . '\' AND category="' . strtolower(mysql_real_escape_string(strip_tags($_REQUEST['category']))) . '"');
$json = array();
while (is_resource($results) && $row = mysql_fetch_object($results)) {
//$json[] = '{"id" : "' . $row->id . '", "label" : "' . $row->label . '"}';
$json[] = '"' . $row->label . '"';
}
echo '[' . implode(',', $json) . ']';
die(); // filthy exit, but does fine for our example.
} else {
user_error("Failed to select the database");
}
}
?>
Ok, so I stripped everything down as far as I know how. it appears the problem may be related to the ajax request.
Here is the stripped down code using $_GET.... $id=$_GET["categoryID"]. It prints the $_GET["categoryID"] result and the $id.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test $_GET</title>
</head>
<body>
<?php
if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
$id = $_GET["categoryID"];
}
?>
print_r($_GET) = <?php print_r($_GET); ?>
<br />
print_r($id) = <?php print_r($id); ?>
</body>
</html>
And here is the post page sample....
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>testPOST</title>
</head>
<body>
<form action="testPOST.php" method="post">
categoryID: <input type="text" name="categoryID" /><br />
<input type="submit" value="Submit" />
</form>
</body>
</html>
And the Post result page...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test $_POST</title>
</head>
<body>
<?php
if(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
$id = $_POST["categoryID"];
}
?>
print_r($_POST) = <?php print_r($_POST); ?>
<br />
print_r($id) = <?php print_r($id); ?>
</body>
</html>
It still isn't setting the $id = $_GET["categoryID"]; Even though is is printing it outside of the request block Thanks again for all your help.
2 answers
solution1
1 2012-05-08 02:04:54
It looks to me like the problem is that your form is POST, or that your form isn't submitting correctly. Try to echo out $_GET['categoryID'] and see what you get.
solution2
0 2012-05-08 02:06:42
Check to make sure that $_GET["categoryID"] is set before you try to initialize $id with it:
isset($_GET["categoryID")
will return true if $_GET["categoryID"] contains a value.
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