Reputation: 453
I have a URL : foo.php?name=adam&lName=scott
, and in foo.php
I have a form which gives me values of rectangleLength
& rectangleBreadth
with a submit button.
When I click this submit button with form action as $_SERVER['REQUEST_URI']
, I get this result URL: foo.php?rectangleLength=10&rectangleBreadth=5
(these values have been filled in by the user).
Notice that I am losing my previous values name
& lName
from the URL.
How can I keep them?
Also, keep in mind that I have to come back to foo.php
and if the user wants to submit the form again then the length and breadth values should change.
Upvotes: 44
Views: 42538
Reputation: 309
To handle query with arrays:
foreach (explode("\n", http_build_query($query, '', "\n")) as $keyValue) {
[$key, $value] = explode('=', $keyValue, 2);
$key = htmlspecialchars(urldecode($key), ENT_COMPAT | ENT_HTML5);
$value = htmlspecialchars(urldecode($value), ENT_COMPAT | ENT_HTML5);
echo '<input type="hidden" name="' . $key . '" value="' . $value . '"' . "/>\n";
}
Upvotes: 1
Reputation: 131
My personal preference would be to specify the keys you wish to accept and be sure to run the value through htmlspecialchars().
$url_params = array(
'tab'
);
foreach( $url_params as $key ) {
echo !empty( $_GET[$key] ) ? '<input type="hidden" name="'. $key .'" value="'. htmlspecialchars( $_GET[$key] ) .'" />' : '';
}
Upvotes: 0
Reputation: 3323
There are different ways to do this. All of them write the parameters they receive into a file, memory, or a database and retrieve them later with a key
The easiest method is something like a session variable: http://php.net/manual/en/features.sessions.php
The main setup is something like this (caution: that is unsecure code, make sure you only add session variables you want to keep, and sanitize user input!):
<?php
session_start();
foreach ($_GET as $key=>$value) {
$_SESSION[$key]=>$value;
}
?>
and now, as long as the user does not close the browser, you can access these variables with $_SESSION[varname];
Upvotes: 4
Reputation: 91983
You can add two hidden fields in the form on the first target site, blabla.php in your case:
<form ...>
<input type="hidden" name="name" value="<?php echo htmlspecialchars($_GET['name']);?>">
<input type="hidden" name="lName" value="<?php echo htmlspecialchars($_GET['lName']);?>">
<!-- rest of the form here -->
</form>
For a dynamic solution, use a foreach loop:
<?php
foreach($_GET as $name => $value) {
$name = htmlspecialchars($name);
$value = htmlspecialchars($value);
echo '<input type="hidden" name="'. $name .'" value="'. $value .'">';
}
?>
You may consider locking the dynamic approach down to a list of known possible keys:
<?php
$keys = array('name', 'lName', ...);
foreach($keys as $name) {
if(!isset($_GET[$name])) {
continue;
}
$value = htmlspecialchars($_GET[$name]);
$name = htmlspecialchars($name);
echo '<input type="hidden" name="'. $name .'" value="'. $value .'">';
}
?>
Upvotes: 52
Reputation: 13110
Once, I needed sorting the results in a table keeping the search results coming from GET. I did like that:
unset($_GET['sort']); // sort param is removed, otherwise there will be created many sort params
$url = http_build_query($_GET);
echo "<a href='?".$url."&sort=title'>Title</a>";
echo "<a href='?".$url."&sort=author'>Author</a>";
Upvotes: 2
Reputation: 1
$_GET['fromvs']
In VendorSearch.php, aftersession_start(),
$srchfor ="";
$fromwhat = $_GET['fromvs'];
$_SESSION['fromwhat'] = $fromwhat;
$vs = $fromwhat;
Use hidden input to store URL passed variable
<div style='position: absolute; top: 10px; left: 400px;'><input type='hidden' hidden='hidden' id='fromvs' name='fromvs' value="<?php echo $_SESSION['fromwhat']; ?>"></div>
But this thie
Segment in Calling html .... Add a Subcontractor .... Assign Subcontractor Contracts ..... Log Out ....
Segment in target php: VendorSearch.php
<?php
//VendorSearch.php
//http://mted202.mtaent.org:9051/ocr/login.php rweinbau
require_once('dbinfo.php');
session_start();
$c = oci_pconnect("ocr","ocrmta","HQT4");
oci_set_client_identifier($c, $_SESSION['username']);
$username = htmlentities($_SESSION['username'], ENT_QUOTES);
.....
$srchfor ="";
$fromwhat = $_GET['fromvs'];
$_SESSION['fromwhat'] = $fromwhat;
$vs = $fromwhat;
if (isset($_POST['srchvnd']))
{
$vs = $_POST['fromvs'];
somefunction($vs);
}
else
{
;
}
?>
<body>
<form class="vfrmsrch" name="vndsearch" id="vndsearch" action="VendorSearch.php?fromvs='<?php echo $fromwhat; ?>'" method="POST">
<div style='position: absolute; top: 10px; left: 400px;'><input type='hidden' hidden='hidden' id='fromvs' name='fromvs' value="<?php echo $_SESSION['fromwhat']; ?>"></div>
......
</form>
.......
</body>
</html>
<?php
function somefunction($vvs){
//$msg = "We are inf somefunction() function </a></div><br>";
// echo "<div style='position: absolute; top: 100px; left: 10px;'><a style='color:blue'>".$msg;
$_SESSION['fromwhat'] = $vvs;
............
oci_close($c);
}
Upvotes: 0
Reputation: 1
Following code works for my project. Hope it help some. 1. In menu (calling html) I call VendorSearch.php. variable fromvs is used in URL. 2. The target php VendorSearch.php will do different jobs based on the value of $_GET['fromvs'] 3. In VendorSearch.php, aftersession_start(),
$srchfor ="";
$fromwhat = $_GET['fromvs'];
$_SESSION['fromwhat'] = $fromwhat;
//save value to $VS
$vs = $fromwhat;
3. Use hidden input to store URL passed variable
<div style='position: absolute; top: 10px; left: 400px;'><input type='hidden' hidden='hidden' id='fromvs' name='fromvs' value="<?php echo $_SESSION['fromwhat']; ?>"></div>
4. But this thie field's value may lost after clicking button "srchvnd". So use a function to reset
$_SESSION['fromwhat'];
if (isset($_POST['srchvnd']))
{
$vs = $_POST['fromvs'];
somefunction($vs);
}
-----------------Source code----------------------
Segment in Calling html
....
<body>
<div style=" position: absolute; top: 1px; left: 5px; height:740px; width:205px; border-radius: 10px;" >
<!-- Start css3menu.com BODY section -->
<ul id="css3menu1" class="topmenu">
<li class="topfirst"><a href="VendorSearch.php?fromvs=V" target="I1" style="width:183px;">Add a Subcontractor </a></li>
....
<li class="topmenu"><a href="VendorSearch.php?fromvs=S" target="I1" style="width:183px;">Assign Subcontractor Contracts</a></li>
.....
<li class="toplast"><a href="login.php" target="_self" style="width:183px;">Log Out</a></li>
</ul>
....
</div>
Segment in target php: VendorSearch.php
<?php
//VendorSearch.php
//http://mted202.mtaent.org:9051/ocr/login.php rweinbau
require_once('dbinfo.php');
session_start();
$c = oci_pconnect("ocr","ocrmta","HQT4");
oci_set_client_identifier($c, $_SESSION['username']);
$username = htmlentities($_SESSION['username'], ENT_QUOTES);
.....
$srchfor ="";
$fromwhat = $_GET['fromvs'];
$_SESSION['fromwhat'] = $fromwhat;
$vs = $fromwhat;
if (isset($_POST['srchvnd']))
{
$vs = $_POST['fromvs'];
somefunction($vs);
}
else
{
;
}
?>
<body>
<form class="vfrmsrch" name="vndsearch" id="vndsearch" action="VendorSearch.php?fromvs='<?php echo $fromwhat; ?>'" method="POST">
<div style='position: absolute; top: 10px; left: 400px;'><input type='hidden' hidden='hidden' id='fromvs' name='fromvs' value="<?php echo $_SESSION['fromwhat']; ?>"></div>
......
<td><input type="submit" class="slbt" name="srchvnd" id ="srchvnd" vaue="Search"></input></td>
......
</form>
.......
</body>
</html>
<?php
function somefunction($vvs){
//$msg = "We are inf somefunction() function </a></div><br>";
// echo "<div style='position: absolute; top: 100px; left: 10px;'><a style='color:blue'>".$msg;
$_SESSION['fromwhat'] = $vvs;
............
oci_close($c);
}
Upvotes: 0
Reputation: 1399
A simpler solution to keep the URL unchanged by using http_build_query
<form action="<?php echo $_SERVER["PHP_SELF"] . '?'.http_build_query($_GET); ?>" ...
..
..
Upvotes: 8