How would I for example, take a url with some $_GET data, for example http://www.website.com/something?food=steak
How would I then output steak? My current situation is that I'm trying to use the Header function to redirect to a page where I have it so that if $_GET["duplicate"] is equal to 1, then echo this, else, echo nothing. But its not taking the $_GET data I can tell I did a var_dump($_GET);
<?PHP if ($_GET["duplicate"] == 1 )
{
echo "<h1>Username Taken!</h1>";
}
else
{
echo "";
}
?>
The above is using the url http://something.com/register?duplicate=1
It's just a variable, treat it like one:
echo $_GET['food'];
Everything after question mark is available in form of global array $_GET.
$a=$_GET["food"];
echo $a;
also
if url has ?food=steak&color=red;
$a=$_GET["food"];
$b=$_GET["color"];
more than one is possible. Also search for $_POST.
Alright, so I figured my issue out. I have a $_GET variable that gets the end of the page and declares it as "p" for page. I need to do the following to get it to work.
?p=createuser&duplicate=1
Related
I'd like to replace content within my page based on the URL parameter.
Ideally I'd like to use PHP to get:
if {{parameter is X}} display {{content X}}
if {{parameter is Y}} display {{content Y}}
..for a few pages.
Current set up:
<?php if ($CURRENT_PAGE == "Index") { ?>
<div id="firstDiv">this is the standard page</div>
<?php } ?>
<?php if ($CURRENT_PAGE == "p1") { ?>
<div id-"secondDiv">this is a variation of the page</div>
<?php } ?>
And using include("includes/content.php"); to call the html blocks to the page
The firstDiv displays in index.php as expected, but adding the URL parameter changes nothing - the same div still shows (I'd like it to be replaced with the secondDiv)
It seems $CURRENT_PAGE doesn't like URL parameters - what is the alternative?
Hopefully this makes sense, I'm pretty new to PHP. Happy to provide more details if required.
Thanks in advance for any help.
-- UPDATE --
Thank you for the answers so far!
It seems I missed part of my own code (Thanks to vivek_23 for making me realise this - I'm using a template, excuse me!!)
I have a config file that defines which page is which, as so:
<?php
switch ($_SERVER["SCRIPT_NAME"]) {
case "index.php/?p=1":
$CURRENT_PAGE = "p1";
break;
default:
$CURRENT_PAGE = "Index";
}
?>
Before I learn $_GET, is there a way I can use my current set up?
Thanks again.
-- UPDATE 2 --
I have switched to using the $_GET method, which seems to be working well so far. My issue now is when the parameter is not set it is giving an undefined error. I'll try to remember to update with the fix.
$p = ($_GET['i']);
if($p == "1"){
echo '<div id="firstDiv"><p>this is the first div</p></div>';
}
Thanks to the two answerers below who suggested using $_GET
You can used $_GET like
if($_GET['p']==1){
echo '<div id="firstDiv">this is the standard page</div>';
}else if($_GET['p']==2){
echo '<div id="secondDiv">this is a variation of the page</div>';
}
The other way! you can used basename() with $_SERVER['PHP_SELF']
//echo basename($_SERVER['PHP_SELF']); first execute this and check the result
if(basename($_SERVER['PHP_SELF']) == 'index'){
echo '<div id="firstDiv">this is the standard page</div>';
}else{
echo '<div id="secondDiv">this is a variation of the page</div>';
}
You need to send the parameters on the URL query string, like:
yourdomain.com?p=1
So, with this URL, the query string is "?p=1", where you have a GET parameter named 'p' with a value of '1'.
In PHP to read a GET parameter you can use the associative array $_GET, like this:
$current_page = $_GET['p'];
echo $current_page; // returns '1'
The rest of your logic is OK, you can display one div or the other based on the value of the p parameter.
You can read more about how to read query string parameters here: http://php.net/manual/en/reserved.variables.get.php
How do you place a $_GET['****']; into a string or make it into a variable.
For Example i have this url:
http://localhost/PhpProject2/product_page.php?rest_id=3/area=Enfield.
I want to get the area and rest_id from the url. in order to redirect another page to this exact page.
echo"<script>window.open('product_page.php?rest_id= 'put get here'/area='put get here'','_self')</script>";
I have so far done this:
if(isset($_GET['rest_id'])){
if(isset($_GET['rest_city'])){
$_GET['rest_id'] = $rest_id;
}
}
This obviously does not work, so my question is how do i make the 2 $_GET into a variable or call the $_GET into the re-direct string.
What i have tired so far
echo"<script>window.open('product_page.php?rest_id=' . $GET['rest_id'] . '/area='put get here'','_self')</script>";
How or what is the best practice?
ok, first things first. in your URL you have to separate the parameters using an ampersand "&", like this
http://localhost/PhpProject2/product_page.php?rest_id=3&area=Enfield
Also, you have to assign the $_GET value to a variable, not the other way around, like this
$rest_id = $_GET['rest_id'];
so if you create a PHP file named product_page.php and use the url i gave you, and your PHP code looks like this, it should work..
<?php
if (isset($_GET['rest_id'])){
$rest_id = $_GET['rest_id'];
}
if (isset($_GET['rest_id'])){
$area = $_GET['area'];
}
$url = 'other_page.php?rest_id=' . $rest_id . '&area=' . $area;
header("Location: $url");
?>
The question here is why do you want to redirect from this page to the other, and not send the parameters directly to the "other_page.php"????
I am looking to set a session variable based on a search conducted by the user. The idea is that the search is populated with their last search wherever they go on the site.
I have the following code that I thought would set the variable if the variable geo-box was present and use the saved variable if it isn't, but this doesn't work...
session_start();
if(isset($_GET['geo-box'])){
echo $_SESSION['town'] = $_GET['geo-box'];
} else {
echo $_SESSION['town'];
}
session_start();
if(isset($_GET['geo-box']))
$_SESSION['town'] = $_GET['geo-box'];
echo $_SESSION['town'];
You can't echo a variable while defining it.
Best of Luck!
You are trying to echo a variable and set it in the same line.
Try this:
session_start();
if( isset($_GET['geo-box']) ) {
$_SESSION['town'] = $_GET['geo-box'];
}
echo $_SESSION['town'];
You can not echo a value and assign it at the same time. Give this a try!
Hope this helps.
Is it possible to create an HREF link that calls a PHP function and passes a variable along with it?
<?php
function sample(){
foreach ($json_output->object ){
$name = "{$object->title}";
$id = "{$object->id}";
print "<a href='search($id)' >$name</a>";
}
}
function search($id){
//run a search via the id provide by the clicking of that particular name link
}
?>
You can do this easily without using a framework. By default, anything that comes after a ? in a URL is a GET variable.
So for example, www.google.com/search.html?term=blah
Would go to www.google.com/search.html, and would pass the GET variable "term" with the value "blah".
Multiple variables can be separated with a &
So for example, www.google.com/search.html?term=blah&term2=cool
The GET method is independent of PHP, and is part of the HTTP specification.
PHP handles GET requests easily by automatically creating the superglobal variable $_GET[], where each array index is a GET variable name and the value of the array index is the value of the variable.
Here is some demo code to show how this works:
<?php
//check if the get variable exists
if (isset($_GET['search']))
{
search($_GET['search']);
}
function Search($res)
{
//real search code goes here
echo $res;
}
?>
Search
which will print out 15 because it is the value of search and my search dummy function just prints out any result it gets
The HTML output needs to look like
anchor text
Your function will need to output this information within that format.
No, you cannot do it directly. You can only link to a URL.
In this case, you can pass the function name and parameter in the query string and then handle it in PHP as shown below:
print "<a href='yourphpscript.php?fn=search&id=$id' >$name</a>";
And, in the PHP code :
if ($_GET['fn'] == "search")
if (!empty($_GET['id']))
search($id);
Make sure that you sanitize the GET parameters.
No, at least not directly.
You can link to a URL
You can include data in the query string of that URL (<a href="myProgram.php?foo=bar">)
That URL can be handled by a PHP program
That PHP program can call a function as the only thing it does
You can pass data from $_GET['foo'] to that function
Yes, you can do it. Example:
From your view:
<p>Edit
Where 1 is a parameter you want to send. It can be a data taken from an object too.
From your controller:
function test($id){
#code...
}
Simply do this
<?php
function sample(){
foreach ($json_output->object ){
$name = "{$object->title}";
$id = "{$object->id}";
print "<a href='?search=" . $id . "' > " . $name . "</a>";
}
}
if (isset($_REQUEST['search'])) {
search($_REQUEST['search']);
}
function search($id){
//run a search via the id provide by the clicking of that particular name link
}
?>
Also make sure that your $json_output is accessible with is the sample() function. You can do it either way
<?php
function sample(){
global $json_output;
// rest of the code
}
?>
or
<?php
function sample($json_output){
// rest of the code
}
?>
Set query string in your link's href with the value and access it with $_GET or $_REQUEST
<?php
if ( isset($_REQUEST['search']) ) {
search( $_REQUEST['search'] );
}
function Search($res) {
// search here
}
echo "<a href='?search='" . $id . "'>" . $name . "</a>";
?>
Yes, this is possible, but you need an MVC type structure, and .htaccess URL rewriting turned on as well.
Here's some reading material to get you started in understanding what MVC is all about.
http://www.phpro.org/tutorials/Model-View-Controller-MVC.html
And if you want to choose a sweet framework, instead of reinventing the MVC wheel, I highly suggest, LARAVEL 4
I am trying to echo $_POST['admin_name']; on next page but it's not working.
How can I do this?
if(($a_name==$adminname)&&($pass_word==$pass)) {
if($a_name=="goher") {
$_POST['admin_name']=$a_name;
echo "<script>window.location='home.php'</script>";
}
else {
$_POST['admin_name']=$a_name;
echo "<script>window.location='upload.php'</script>";
}
}
else {
echo "<script>window.location='signin.php?msg=Try Again'</script>";
}
Assigning something to $_POST does not make the data available on some other page (you don't even POST in your case).
I think what you want is $_SESSION - when using sessions the data you stored there will be available on subsequent page loads (assuming you always call session_start()).