this is my code that I've written so far --
<?php
$actual_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
$search_link = "http://www.example.com/register_complete.php?user=";
if($actual_link == $search_link)
echo "Place your conversion pixel code here";
?>
The situation is like this - Once a user completes a registration he/she lands on urls like these -
http://www.example.com/register_complete.php?user=abcd1234
http://www.example.com/register_complete.php?user=abcd12345
http://www.example.com/register_complete.php?user=abcde123456
So what I am trying to achieve is fetch the current url using $_SERVER and then matching it with my sample url which is stored in $search_link if both these match then I wish to display a particular code otherwise the code will not be displayed anywhere else in the website.
I don't know how to use wildcard entries in PHP :(
My mind tells I should have done something like this -
http://www.example.com/register_complete.php?user=*
Can anyone over here help me regarding this please?
Why so complicated? I bet you can exclude http://www.example.com/register_complete.php, because if it's not this file, it won't load the script anyways, so focus on ?user=abc
if (isset($_GET["user"])) {
echo "Place your conversion pixel code here";
}
You can also try empty()
OR if you want to compare it to certain value:
if ($_GET["user"] == "abcd1234") {
echo "Place your conversion pixel code here";
}
There is a function which could help you with your problem and that is strpos(). Check out the following link:
http://in3.php.net/strpos
Related
<?php
$sPage = $_GET["p"];
//echo ("You picked the page: " . $sPage);
if ($sPage == "") {
$sPage = "home.php";
}
include($sPage);
?>
It came from a php multipage website. I would like to write this same kind of code, but in javascript.
What does this code do?
http://www.tropicalteachers.com/web110/superduper/
this link is where the code came from, the php dynamic one
Okey so let's just start from the top to the bottom. I will try to explain shortly what each php thing does also incase you don't know PHP to well.
$sPage = $_GET["p"];
This code above is getting query parameters that you got in your URL, currently it's getting the query parameters "p" so for example if the url was http://localhost/index.php?p=hola the "$sPage" variable would hold the value "hola".
if($sPage == "") { $sPage = "home.php"; }
Short if statement checking if there was a query parameter with a value, if not we will set the variable value to "home.php"
include($sPage)
So this will litrally just take the file "home.php" in this case and include it in page. So anything that is in the file "home.php" will be displayed on the current page you are at.
To replicate this in javascript it would be similar to using ajax to fetch the content you wanna display. Below i will link to a tutorial that can explain how to accomplish that.
https://www.w3schools.com/jquery/jquery_ajax_load.asp
This doesn't help with the URL part, but that you can google yourself to with the correct termanology
I've just designed my first form in HTML and a PHP page to display the results. In the form the user inputs some codes in response to some questions, a bit like a multiple choice, so for example, these are "ABC". The PHP page displays the code to the user as a link, which when clicked will go to a bookmark (a link within the same page) with the ID #ABC. This was achieved with simple manipulation of the PHP variable as follows:
<?php
$code = "ABC"
$part1 = '<a href="mywebpage.php#';
$part2 = '">Go to this code</a>';
$string = $part1.$code.$part2;
echo $string;
?>
(i.e. Link in the page says "go to this code" and when clicked will go to section with bookmark ABC)
This all works fine, but I simply need to know if there is a way of error trapping so that if a bookmark does not exist for the code entered, a message can be displayed to the user instead? Can this be done using the PHP variable, or do I need to use JavaScript? One work around may be to search the web page for the ID "#ABC'. Is it possible to do this? Another option would be to store an array of valid codes on the server then query this before setting the bookmark, but I want to keep it as simple as possible. Any help appreciated, thanks.
What you call a "bookmark" we call a hash. And when you say "go to a bookmark" you mean a hash change. Hash changes do not make an additional request to the server, it is all handled on the client-side, therefore this must be done with JavaScript and not PHP.
So let's just do some simple JavaScript on hash change window.onhashchange that will search for an element with that ID and if it's not found alert something.
window.onhashchange = function(){
if(!document.getElementById(location.hash){
alert("not found");
}
}
I'm on wordpress atm and I'm stuck with a small issue.
To save the people receiving the site some work I hoped i'd be able to make things as easy as possible.
So what I did was add a plugin called "advanced custom fields", and I made a custom field.
What I wanted was to have 1 custom field that'd show a link(as text) in the following way:
The issue
My issue is that I want the link(example) to show without needing to fill in "The issue", because in the backend(the wordpress cms) it's a lot of trouble for the person to fill in an extra sub field called name with the exact same value.
So my question is, is it possible to show a link without needing to fill in "The Issue" or is there a different html tag for this?
Thanks in advance!
You can check if the field "The Issue" is empty and only in this case reprint in this place the "example" field.
if (!empty(the_field('The issue'))) {
<?php the_field('The issue'); ?>
} else {
<?php the_field('example'); ?>
}
If you need to ensure that a link input from the user is external (that always begins with http://) you can do something like this (of course, before printing the $link variable in the href):
if (strpos($x, "http://") == 0) {
$link = $x;
} else {
$link = "http://" . $x;
}
strpos search the position of the first occurrence of a substring on your string ($x, for example). So if the position is 0 means that the string begins with "http://", so it is external, but if this is not the case you have to add it at the beggining of the string.
One have to note that user inputs are tricky (imagine that the user writes " http: //..." with a space before the url) so it is possible that one needs more validation than this, but I think that the idea is clear.
I'm building an "away"-page for my website and when a user posted a link to another website, each visitor clicking that link will be redirected first to the away.php file with an info that I am not responsible for the content of the linked website.
The code in away.php to fetch the incoming browser URI is:
$goto = $_GET['to'];
So far it works, however there's a logical issue with dynamic URIs, in example:
www.mydomain.com/away.php?to=http://example.com
is working, but dynamic URIs like
www.mydomain.com/away.php?to=http://www.youtube.com/watch?feature=fvwp&v=j1p0_R8ZLB0
aren't working since there is a & included in the linked domain, which will cause ending the $_GET['to'] string to early.
The $goto variable contains only the part until the first &:
echo $_GET['to'];
===> "http://www.youtube.com/watch?feature=fvwp"
I understand why, but looking for a solution since I haven't found it yet on the internet.
Try using urlencode:
$link = urlencode("http://www.youtube.com/watch?feature=fvwp&v=j1p0_R8ZLB0") ;
echo $link;
The function will convert url special symbols into appropriate symbols that can carry data.
It will look like this and may be appended to a get parameter:
http%3A%2F%2Fwww.youtube.com%2Fwatch%3Ffeature%3Dfvwp%26v%3Dj1p0_R8ZLB0
To get special characters back (for example to output the link) there is a function urldecode.
Also function htmlentities may be useful.
You can test with this:
$link = urlencode("http://www.youtube.com/watch?feature=fvwp&v=j1p0_R8ZLB0") ;
$redirect = "{$_SERVER['PHP_SELF']}?to={$link}" ;
if (!isset($_GET['to'])){
header("Location: $redirect") ;
} else {
echo $_GET['to'];
}
EDIT:
Ok, I have got a solution for your particular situation.
This solution will work only if:
Parameter to will be last in the query string.
if (preg_match("/to=(.+)/", $redirect, $parts)){ //We got a parameter TO
echo $parts[1]; //Get everything after TO
}
So, $parts[1] will be your link.
I'm a bit new to this so sorry if this has been covered already but i'm going around in circles searching.
I've had a look around learn t how to edit htaccess and use the get function, I then even found a plugin called redirection that did similar.
What I would like to do is if I have a URL http://example.com/file.php?id=blue
is to grab the id which is "blue"
then in a href link dynamically add it to the end of another url
Link Example
If someone could help show me or point me in the right direction on how to get the id blue and add it into a href that would be great.
Many Thanks
You have to use $_GET. People might be dicks about it here - but I had a hard time when I was first learning to program too. You'll get it, don't worry.
This is how get works (at least, all you need to know about how it works):
if you have the file index.php
if you add a query string to the end of it like index.php?id=1
You can access id=1 by doing the following in your code:
$id = $_GET['id'];
Similarly if the query string contains the following index.php?id=1&page=5&par=3&club=putter&upnext=tigerwoods
On the left hand of the equal sign is the Key(id, page, par, club, upnext) and on the right side their value(1,5,3,putter,tigerwoods)
One thing to remember is that when retrieving numbers from the query string they will always be of the string type, so you cant do something like
if ( $_GET['page'] === 5 )
you'll have to do
if ( $_GET['page'] == 5 )
and to echo it into a link:
$club = $_GET['club'];
if ( $club == 'NRA' ) {
echo "Gun Show";
echo 'Buy tickets to my gunshow ^^';
}
Hope this helps!
You can also do things like set your website up so that it has one template and use the $_GET parameter to determine which files to include into the content sections of the site via a switch command. I do this, but not across my whole site. For my user control panel, I do this to simply include only the file necessary (change email, update password, delete account, update profile, etc)
Cah'piche?
Use the $_GET parameter.
YAY!!