My Html links has extra attributes, like:
<a cat-data="175" rt-data="154" href="index.php?view=item"></a>
<a cat-data="775" rt-data="134" href="index.php?view=item"></a>
<a cat-data="575" rt-data="174" href="index.php?view=item"></a>
In this code is to see: cat-data="" and rt-data=""
If i click on this link and go to next page, can i request this data? cat-data="" and rt-data=""
Adding arbitrary attributes to an <a> element will not transfer them as part of the URL. So no, at least not as it stands.
You can encode them in the URL in the first place:
href="index.php?view=item&rt=174&cat=575"
and they will be accessible through $_GET.
You could also use JavaScript to modify the href attribute based on the other attributes, but that is needlessly complicated and dependant on JavaScript, so it is not recommended.
Note that adding arbitrary attributes to an element will make your HTML invalid and is not recommended. HTML 5 allows custom attributes if the name starts with data-, which might be what you are trying to use here, but you are using data as a suffix when it must be a prefix.
the data attribute uses for jquery and javascript and you can't have them in the next page, or on servers side, you can add the data to the url and then get them as get or post,
you can also store data on cookies and get the cookies on the next page
please use the next url : href="index.php?view=item&cat-data=175&rt-data=154
Related
i already tried js function and php get method and this also
<a name='page' value='\"$next_page\"' href = \"$_PHP_SELF\">Next</a>
and accept as a variable but not working
i want to accept value by using post method through ANCHOR tag instead get method. and i dont want to use any js function.
plz suggest any solution using post method only
your best option is to use a form with a submit button that looks like a link.
It's impossible to use an anchor tag to send a post request. If using an anchor is a requirement then you need some javascript code.
I’m trying to store the content of a div to a variable.
Example:
<div class="anything">
<p>We don't know the content of this div</p>
</div>
I want to search for <div class="anything"> and store everything between opening and the end tag.
We also want to avoid using absolute pathnames, so that it only searches the current HTML/PHP file for this div where the code is present.
Is this possible with PHP, or is this only possible with JavaScript ?
PHP is not that intelligent. He doesn't even know what he says.
PHP is a server-side language. It has absolutely NO clue about what the DOM (ie. what is displayed in your browser's window) is when it delivers a page. Yeah I know, PHP rendered the DOM, so how could it not know what's in there?
Simply put, let's say that PHP doesn't have a memory of what he renders. He just knows that at one particular moment, he is delivering strings of characters, but that's all. He kind of doesn't get the big picture. The big picture goes to the client and is called the DOM. The server (PHP) forgets it immediately as he's rendering it.
Like a red fish.
To do that, you need JavaScript (which is on the client's computer, and therefore has complete access to the rendered DOM), or if you want PHP to do this, you have to retrieve an full-rendered page first.
So the only way to do what you want to do in PHP is to get your page printed, and only then you can retrieve it with an http request and parse it with, in your case, a library such as simpleHtmlDom.
Quick example on how to parse a rendered page with simpleHtmlDom:
Let's say you know that your page will be available at http://mypage.com/mypage.php
$html = file_get_html('http://mypage.com/mypage.php');
foreach($html->find('div.anything') as $element)
echo $element->src . '<br>';
you probably need a combination of those.
In your Javascript:
var content = document.getElementsByClassName("anything")[0].innerHTML();
document.getElementByID('formfield').value(content);
document.getElementByID('hiddenForm').submit();
In your HTML/PHP File:
<form id="hiddenForm" action="path/to/your/script">
<input type="hidden" name="formfield" value="" />
</form>
In the script you defined in the form action:
if(!empty($_POST)){
$content = $_POST['formfield'];
// DO something with the content;
}
Alternatively you could send the data via AJAX but I guess you are new to this stuff so you should start slowly :)
Cheers!
steve
You could use JS to take the .innerHTML from the elements you wan and store them in .value of some input fields of a form and then use a submit button to run the PHP form handling as normal. Use .readOnly to make the input fields uneditle.
I want to pass an id from one page to another when user clicks a url. There can be multiple url each corresponding to a separate id. Based on url clicked, I want to pass corresponding id and an action. Currently I am using following approach:
<a href="Process.php?action=del&id='.$id.'">
However both action and id are visible in url. Is there any way to hide this information in url and not passing it through url?
Also if I pass them using hidden fields, they can be accessed using browser dev tools. I want to make them secure so they can't be read or modified at all.
I would like to hide this for security purpose so no any user can see this
In HTML only, you'll not able to pass "hidden" variables through $_GET.
If you really want to hide some variables when a user click on a link, you can use Javascript with an auto-submitted form to use $_POST variables.
Example
<form method="POST" action="yourpage.php" id="yourform" style="display:none;">
<input type="hidden" name="hiddenfield" value="__" />
</form>
<a href="" onclick="document.getElementById('yourform').submit();return false;" />
Now, in yourpage.php, you'll be able to obtain the $_POST['hiddenfield'] value.
Edit:
I don't think it can be possible to really hide the values from dev tools. Btw, you can maybe use sessions, it will be more "secure"..
Example:
// page1.php
session_start();
$_SESSION['yourname'] = 'yourvalue';
// page2.php
session_start();
$_SESSION['yourname']; // Contains 'yourvalue'
The best way to hide id(if you mean security) is to encrypt it. You should use MCRYPT function to encrypt the id. You can encrypt both ID and your ACTION in one string and just pass this string to URL and then when you want to use it you can decrypt parameter and split it. When you connect it with MOD_REWRITE in htaccess you can get url like:
<a href="Process,Some title of yourpage,í,eHGxC•z»#”“§``"> to make it more "pretty" you can use base64 on this string.
or with base64, mcrypt and mod_rewrite
<a href="Process,SWRlYW">
to decrypt string you should use base64_decode(), mcrypt_decrypt()
You can use base64 for this (if security is really a big concern). Before passing it to the URL,
you can encode it first and then in the receiving end, you can decode it.
Check this URL : http://www.webtoolkit.info/javascript-base64.html
EDIT:
Please ignore the line above in the bracket.
Based on the comments below, base64 is really not responsible for security. Better approach is to use a server sided language to encrypt/decrypt values. Using base64 through javascript is not a good idea. Thanks Bobby.
I want to send the properties of HTML elements as data via POST, for example whether an element is visible or not?
You cannot do it with PHP and HTML alone, since the HTML form would only post a form input's name. You would need to add some JavaScript, which at the time the form is submitted, would iterate over all its inputs and modify their values to include the attribute values as well.
Example:
yourform.onbeforesubmit = function() {
// Loop over form elements and append -visible or -hidden to its value based on CSS style
// jQuery selectors like .is(":visisble") would help a lot here.
// This is just a basic example though - it would require an explicit visibility CSS rule on each
// input element...
for (var i=0; i<yourform.elements.length; i++) {
yourform.elements[i].value = += "-" + yourform.elements[i].style.visibility;
}
}
Another method would be rather than to modify the values of the inputs themselves, keep a hidden input for each visible user input and set the attributes as the value to the hidden input rather than the visible input.
You can not do this with PHP. You will need to use Javascript to determine this information and then either send an Ajax Request or add this information to an existing form.
To elaborate a bit more: PHP is executed Server Side and then sent to the Client (Browser). The Server is not aware of the state of the HTML Elements in the Browser.
As far as i can tell you have a form that is submitted anyway? So add a piece of javascript which is called before the form is submitted (onsubmit property of the form) and have it read out the status of the elements (visible, hidden, ...) and set this information to some hidden form fields.
Make sure the javascript that is called before the form is submitted is returning true, otherwise the action gets cancelled.
In ajax.
Try Prototype Framework, it is really easy to use!
http://prototypejs.org/api/ajax/request
If you want to do that I suppose you will have to create some hidden fields and javascript that would fill them in with information depending on your elements attributes. As far as I know there is no other way.
You have to define your data definition standard first: what do you want to store, and under what name.
then, imho you have to serialize the result and send it through POST, for finally unserializing it once at the server.
Use JSON serialization for an effective way of proceeding.
Include Hidden inputs using PHP like the following:
<input type="hidden" id="hidden1" name="hidden1" value="<?php if(condition) echo "default"; else echo "default";?>">
This default value can be set by PHP during page load, for transferring extra hidden data from one page load to another. But can also be modified by javascript after page load:
<script type="text/javascript">
document.getElementById("hidden1").value="true";
</script>
Note: PHP can change the value of any hidden or non-hidden element only during the next page load. It doesn't have any control over the HTML it sends to the browser. This is why you need Javascript(Client side scripting).
I have a page I am constructing and I need to pass in the values of the option dropdowns to the next page. The problem is that these dropdowns are not in a form.
http://posnation.com/test/pre_config/pre_config_step_2.html
Basically what i need to pass to the next page is that when i click "Proceed To Next Step" I need to pass the value of the type of field like "restaurant" and the number of stations "2" if the user selects restaurant and 2.
HTML:
<a id="proceed" href="foo.html">Proceed!</a>
JS:
$('#proceed').click(function() {
location.href = this.href +'?someVal='+ escape($('#my_select').val());
return false;
});
Working example that executes a formless google search: http://jsfiddle.net/CKcbU/
You basically just add what you want to the query string with javascript.
But really, if at all possible, you should use a form with method="get" which pretty much does this for you without any JavaScript at all.
Use a query string.
http://posnation.com/test/pre_config/pre_config_step_2.html?restaurant=The+Eatery&stations=2
In other words, pass them as part of the URL when calling the next page. The next page will be responsible for reading the query string and extracting the values out.
http://en.wikipedia.org/wiki/Query_string
I do not know what you are using to code in so I cannot be detailed regarding the mechanics of constructing the URL or parsing out the values from the query string on the receiving page.
Here is an article on doing it using JavaScript:
http://javascript.about.com/library/blqs.htm
You can use JavaScript for the same. Assign a onclick event with button of proceed and call a function. In this function use:
windows.location=url?rest=valuerest&opt=valueopt
I am not sure what you are working with, but with almost any framework that I know of you can pass a parameter as part of the url.
These would work fine.
http://posnation.com/test/pre_config/step_2
http://posnation.com/test/pre_config/step_3
Then, just grab the parameter and react accordingly.