I was thinking if it's possible if - let's say - I have a link when clicked will go to the said page but it will actually send a value to the target page. Let's say the value is pageno.
Could i do it like
<a href="displaypage.html?pageno=1">
would that kind of thing work? I mean I want the php which would be something like this
<?php $pageno=$_POST['pageno']; ?>
and then some other process stuff. Going back, I want the php file to get the pageno that was set in the link. Is that possible?
It would be $_GET['var'], and yes, it is possible.
Click here
mypage.php:
<?php
$var=$_GET['var'];
// ... process $var
// go to wherever
echo $var; // show the var
?>
Use $_POST superglobal variable when you send something through POST method, usually forms. If you want to get parameters in URL, use $_GET superglobal array.
You can use $_REQUEST superglobal array either for POST or GET values.
Yes, it's possible to get this.
It sounds like you're talking about a GET request where the parameters are passed into the $_GET array as opposed to the $_POST array.
$pageno=$_GET['pageno'];
<?php
echo 'Link';
?>
Related
So basically what I'm trying to do is if the url contents looks something like this:
www.some.com/dir/?variable=VAR&variable2=VAR2.
then the server would pick this up and I could add it to a variable like:
$var = [variable];
echo '<tag>'.$var.'</tag>';
and that would produce;
<tag>VAR</tag>
Sorry for the lack of code I just don't know how to do this with PHP and my searches are turning up blank.
What you want to do is iterate through your $_GET variables and print them out.
$key is variable and $value is VAR . to print key value combo use this. to print just value remove the '$key is ' part.
<?php
foreach($_GET as $key=>$value)
{
echo "<tag>$key is $value</tag>";
}
These variables are called query parameters and in PHP they can be accessed using the $_GET superglobal.
To use your example, the URL www.some.com/dir/?variable=VAR&variable2=VAR2 will populate $_GET['variable'] with 'VAR' and $_GET['variable2'] with 'VAR2'.
You can access $_GET just like any other array from anywhere in your code so it should be straightforward to put its contents in your HTML code:
<tag><?php echo $_GET['variable'] ?></tag>
<tag><?php echo $_GET['variable2'] ?></tag>
Do keep in mind this presents an HTML injection vulnerability. For example, the user could access the URL www.some.com/dir/?variable=<script>doUnfortunateThings()</script> and your script would dutifully render
<tag><script>doUnfortunateThings()</script></tag>
Which would be executed by the browser when the page loads. This might be fine since only the user messing with the URL will see it, but depending on the rest of your page it could pose a security risk, and could even be made permanent by other scripts running on the page or on the server. It could also bypass any content security policy settings your site is running under, depending on how that is configured if at all.
It is good practice to use the built-in PHP function htmlspecialchars on any user input before displaying it on the page to prevent any html tags from actually being rendered by the browser.
<tag><?php echo htmlspecialchars($_GET['variable']) ?></tag>
<tag><?php echo htmlspecialchars($_GET['variable2']) ?></tag>
If you already know variable name from url then you can use it as array index:
$variable = $_GET["var_name"];
In your case:
$variable = $_GET["variable"];
$variable2 = $_GET["variable2"];
I want to know how to pass a variable from one page to another in PHP without any form.
What I want to achieve is this:
The user clicks on a link
A variable is passed which contains a string.
The variable can be accessed on the other page so that I can run mysql queries using that variable.
use the get method in the url. If you want to pass over a variable called 'phone' as 0001112222:
<a href='whatever.php?phone=0001112222'>click</a>
then on the next page (whatever.php) you can access this var via:
$_GET['phone']
You want sessions if you have data you want to have the data held for longer than one page.
$_GET for just one page.
<a href='page.php?var=data'>Data link</a>
on page.php
<?php
echo $_GET['var'];
?>
will output: data
You can pass via GET. So if you want to pass the value foobar from PageA.php to PageB.php, call it as PageB.php?value=foobar.
In PageB.php, you can access it this way:
$value = $_GET['value'];
check to make sure the variable is set. Then clean it before using it:
isset($_GET['var'])?$var=mysql_escape_string($_GET['var']):$var='SomeDefaualtValue';
Otherwise, assign it a default value ($var='' is fine) to avoid the error you mentioned.
You can use Ajax calls or $_GET["String"]; Method
If you are trying to access the variable from another PHP file directly, you can include that file with include() or include_once(), giving you access to that variable. Note that this will include the entire first file in the second file.
I have data being passed via HTTP post to another page. Essentially passing data from one server to another. On the target page, I cannot get the URL variable to be seen by php. Am I doning something wrong? Is there a better way to do this?
URL string:
form_listener.php?
contactId=101460&inf_custom_ddState=IN&inf_custom_txtZipCode=46268&inf_custom_ddClientDegreeId=729&inf_custom_txtCity=indianapolis&inf_custom_txtLastName=Anderson&inf_form_xid=f28acf3ff321cb273cb4696e996008e0&inf_custom_ddStartSemesterYear=Fall2012&inf_custom_ddMilitaryAffiliation=Yes&infusionsoft_version=1.23.11.30&inf_custom_txtFirstName=someone&inf_custom_txtAddress2=&inf_custom_txtAddress1=4707+East+72nd+Street&inf_custom_ddHSGradYearCustomLiberty=2011&inf_form_name=LibertyOnline&inf_option_Signmeupforthenewsletter=432&inf_custom_txtEmailAddress=killing.fields%40gmail.com&inf_custom_affiliateid=D80576&inf_custom_ddEducationLevel=CLGJ&captcha.typed=jydqb
PHP Code:
$ddState= $_GET['inf_custom_ddState'];
echo $_GET['ddState'];
?>
You don't have ddState in the URI. You want: echo $ddState; (because that is the variable where you copied the data to) or rather (to avoid opening up an XSS security hole) you actually want:
echo htmlspecialchars($ddState);
When you use $_GET you are telling php that the variable is from the URL.
By doing this:
$ddState = $_GET['inf_custom_ddState'];
you are "creating" a local variable ($ddState) with the content of $_GET['inf_custom_ddState'], so you don't have to use $_GET variable anymore.
So your echo can be in 2 ways:
echo $_GET['inf_custom_ddState'];
echo $ddState;
$ddState= $_GET['inf_custom_ddState'];
echo $ddState;
// or
echo $_GET['inf_custom_ddState'];
you can use either this way
echo $_GET['inf_custom_ddState'];
Or
$ddstate=$_GET['inf_custom_ddState'];
echo $ddstate;
Your echo should just be echo $ddState;
You are assigning the value of the URL variable to a local variable. Once that's done, you are dealing with something that is locally scoped.
As the $_GET and $_POST are global array, you can use the following code to see the values:
echo "<pre>Get data</pre>";
print_r($_GET);
echo "<pre>Post data</pre>";
print_r($_POST);
Check whether these variables are set in the request. If not, try to use the post method, as it can hold more data than get method.
First of all, make sure that your page is getting request parameters. Try $_REQUEST['inf_custom_ddState'] or print all variables using print_r($_REQUEST).
$_REQUEST is an associative array that by default contains the contents of $_GET, $_POST and $_COOKIE. If anyting is passing to page then it should get printed.
i want to send a variable to xxx.php how i do it???
GET request would be
xxx.php?variable=something
and accessing $_GET['variable'] in php side would work.
Pass it as a command line argument
Set it in another PHP file and then include it
Put it in the query string then access it from $_GET or $_REQUEST
Put it in the POST data then access it from $_POST or $_REQUEST
Put it in a cookie then access it from $_COOKIES
Put it in a session variable then access it from $_SESSION
You can send the variable by using the GET method as:
http://www.example.com/welcome.php?fname=Peter
and access it from script as: $_GET["fname"]
Via the URL
for example
www.yoursite.com/xxx.php**?**myVar1=myValue1&myVar2=myValue2
seperate vars by &
or you can do it using a form , via Get
<form method='get'>
Step2:
in your PHP document
$_GET['myVar1']
$_GET['myVar2']
xxx.php?variablename=variablevalue
you can send the variable using $_POST or using $_SESSION to pass value of variable from one file to another
use query string in your code.
For example
$a = "myval" ;
< a href="xxx.php?var=$a" >
Get values by usnig $_GET['var'] , This would give you the query string value.
It's best you read up the basic about POST and GET first.
Here's a simple tutorial to get you started: http://www.tizag.com/phpT/postget.php
Via query string or in the header of the page
Pass it as query string:
xxx.php?your_var=var_value
I want to redirect my browser to a PHP page such that when the page loads, it will display to the user a substring of the current URL.
For example, let's say I have a page called substring.php.
My browser forwards me to:
http://www.example.com/substring.php?oauth_token=123456
Is it possible to write some PHP code that will then display to the user, "123456"?
If so, can anyone help me on how to do this?
Thanks!
All the query parameters in the URL will be inside the superglobal $_GET array, so you could simply do this:
echo $_GET['oauth_token'];
BE forewarned that if you're going to output anything that comes in from a URL (ie. user input), you should make sure to sanitize it properly for output. In this case, htmlspecialchars() would be prudent:
echo htmlspecialchars($_GET['oauth_token']);
<?php
echo $_GET['oauth_token'];
?>
Can't you just use the $_GET superglobal? It stores the contents of the query string part of the URI as an associative array:
echo $_GET['oauth_token'];
You can retrieve the value of oauth_token via the $_GET superglobal array:
echo $_GET['oauth_token'];
Of course you should use caution when outputting data you get as input from a user, but that's how it works in short.