javascript not calling php variable - javascript

I'm making a website that has 3 documents. The Php document that has all html structure and script, the css document that has no interest in the question, and the javascript document.
I'm trying to input html contents of a javascript variable through .innerHTML statement. And to do that, I need (of course) to code the HTML content, and so I do the code within the javascript file itself. Like so:
document.getElementById("exp").innerHTML = "<div class=\"cell\">\
<div class=\"project_cell\"><img src=\"img.png\"></div>\
<div class=\"project_cell\">text</div>\
</div>\";
And this works. However, the code is obviously not just this. It's a complex HTML structure that I do not wish to see in the javascript file. So I would like to put the HTML content to be inside this variable into a text file, using PHP, and make that variable on the innerHTML statement instead of all the code.
My PHP file is like this.
<html>
<head>
<title>sample</title>
<?php
$filename = "thisishtml.txt";
$doc = file_get_contents($filename);
?>
<script src="javascriptfile.js" type="text/javascript"></script>
</head>
<body>
...call javascript function...
It seems ok to me, but if I do like:
document.getElementById("exp").innerHTML = "<?php echo $doc ?>"
It doesn't work. I've tried simple text and I've tried with a new project, and it works on a new project, but not in this one. What am I doing wrong? I've looked to many questions and tutorials and didn't help and that's why I'm looking for help in here.
Thank you very much for your time. I hope we could solve this.


Chances are you need to escape the contents of $doc for JS output.
document.getElementById("exp").innerHTML = <?php echo json_encode($doc) ?>;


If your javascript code is in a javascript file, PHP does not process that so you cannot execute PHP code there.
So you can either put the javascript code directly into the PHP page
<script type="text/javascript">
function someFunction()
{
document.getElementById('exp').innerHTML = "<?php echo $doc ?>";
}
</script>
or you can do the follow:
<script type="text/javascript">
var doc = "<?php echo $doc ?>";
</script>
Then in the javascript file do:
function someFunction()
{
document.getElementById('exp').innerHTML = doc;
}

Related

How to convert and transmit PHP Variable data Using JSON to HTML page's Javascript

I can't seem to figure it out how to convert the following PHP variable to HTML:
$persondata = "<div id='teach'><h3>Name: " . $row["fname"]. "<br>User Name: " . $row["username"]. "</h3><p>Password: " . $row["upass"]. "</p></div><br>";
I wanted to pass that exact data to my HTML page, so that I can use JavaScript's getElementById function to insert it into a selected data field.
I asked a similar question here, which helped me work out some of logic I need, but I can't work out this part of the equation.
If you could please let me know of a simple way of going about this, it would be very much appreciated, as I don't even know the keywords to search for.

Hope below code help you:
<?php
$persondata = '';
foreach($rows as $row){
$persondata .= "<div class='teach'><h3>Name: " . $row["fname"]. "<br>User Name: " . $row["username"]. "</h3><p>Password: " . $row["upass"]. "</p></div><br>";
}
?>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).ready(function () {
$('#data-row').html("<?php echo $persondata ?>");
});
</script>
</head>
<div id="data-row"></div>

A javaScriptVar equals with an echo in php of your php variable.
That is to put php inside js
<script type="text/javascript">
//Your JS
var jsvar = <?php echo $persondata; ?>
//Your JS
</script>
Put PHP var like above into js.

Continuing from above answer:
That is to put php inside js
<script type="text/javascript">
//Your JS
var jsvar = <?php echo $persondata; ?>;
//Your JS
</script>
Put PHP var like above into js.
If you want to transmit data from a PHP script in a server to a client side HTML page for using in js. Go like following.
First get all your data in PHP in an array and use json_encode() and after that echo that variable.
Now in the client side HTML use jQuery.ajax() and send request to that PHP file in server.
When you have the response in Json use js to fragment it and append
wherever you want.
Above is the basic procedure to send data from PHP to HTML page using JS.

Is there a way to stop `<script>' from loading the same javascript twice in PHP/Javascript/HTML?

Is there a PHP require_once or include_once for <script>? I know <script> is pure HTML, but does PHP or HTML have such a thing?
I would like to prevent javascript from loading twice in the same page.
Example:
<script type="text/javascript" src="js/jquery-0.4.ajaxify.min.js"></script>

Seems like you are looking for this:
http://wonko.com/post/painless_javascript_lazy_loading_with_lazyload

One of the way you can run script tags in php would be
<?php
....Here is php code
?>
... add the script here(<script>....</script>
<?php
?>
Another probable way is :
Using php inside the script tags for example:
<script type="text/javascript">
var alertMsg = '<?php echo $custom_message; ?>';
alert(alertMsg);
</script>
If you are using buttons
echo('<button type="button" onclick="customfunction();">My Button</button>');
<script>
//call your customfunction here
</script>
AN UPDATE TO SOLVE LOADING SCRIPT CONTENTS TWICE
I would suggest use of javascript function which are called to the specific page as they are needed an example would be
Create a file with a .js eg
example.js
here declare your functions you would put in the script tags of a html page
In the page you want to use the <script>
Include the example.js file and you can call the custom functions from there use the obect orientend approach
Check This resource for more info about obect orientend javascrip

Loading file contains using document ready function not working

I would like to load the following page inside another page after the main page has loaded. I have the following code:
<script language="javascript">
$(document).ready(function(){
$.get('http://$_SERVER[SERVER_NAME]/X.php?logon=Y&vendorref="<?php .$row_RS_Product['id'].?>"&mode=product', function(data) {
$('#tabs-6').html(data);
});
});
</script>
I am not very familiar with this code so please excuse me if I made the obvious mistake
Could anybody help please as it does work when using file_get_contents in php, but this is slowing the page load down tremendous.
Any help welcome

I think you want to get $_SERVER[SERVER_NAME] from PHP so you need to add <?php echo when creating the url to get from. Also you need to have echo when opening the php tag to echo, not . .
Dot is used to concat string in php like this "aaa" . "bbb" (without opening the php tag)
So you need something like this:
$.get('http://<?php echo $_SERVER[SERVER_NAME]; ?>/X.php?logon=Y&vendorref="<?php echo $row_RS_Product['id']; ?>"&mode=product', function(data) {
$('#tabs-6').html(data);
});

Passing a PHP variable into Javascript returns NULL

I know there are a lot of questions covering something similar, but I've tried the answers without any luck.
Snippet of PHP:
$usernum_query = "SELECT numPersonID FROM tbllogins WHERE txtUserName='$currentuser'";
if(!$usernumber = $db1->query($usernum_query)){
die('There was an error running the usernumber query [' . $db1->error . ']');
}
while($row = $usernumber -> fetch_assoc()) {
$userIDnum = $row['numPersonID'];
$userIDnum = utf8_encode($userIDnum);
}
Snippet of Javascript:
$(function(){
$("#0").click(function(){
var userIDnum = <?php echo json_encode($userIDnum); ?>;
alert(userIDnum);
The most common answer I've come across says to UTF_encode my variable, which I think I've done correctly. I've also tried:
var userIDnum = <?php echo $userIDnum; ?>;
Which doesn't work.
In my HTML outside of the script,
<?php echo json_encode($userIDnum); ?>
return "90" (with the quotes)
<?php echo $userIDnum; ?>
returns 90 (without the quotes).
Within the script, I get null and no alert box, respectively.
Any ideas as to why the variable isn't passed into the script? Thanks!
edit: tried with quotes and got the same result

[Taken from comments as requested]
If I can make a recommendation, put your value in a data-attribute in the HTML (e.g. <body data-user-id="<?php echo $userId ?>">. This keeps you from mixing code languages together which is hard to read, and would allow your external script to run correctly without making it a PHP page.
As far as IE9, I'll take a quick look. You might want to see how jQuery manages the data attributes. You should, at the least, have access to
domObject.getAttribute('data-user-id').
Yep, just did a quick lookup, and even IE10 doesn't support the dataset feature. So, you'll need to use getAttribute for IE <= 10.

A solution based on a suggestion by calamari:
In the HTML:
<!DOCTYPE html>
<!--[if lt IE 11 ]> <html class="ie10orless"> <![endif]-->
<head>
... more code here ...
And in the script:
var oldIE;
if ($('html').is('.ie10orless')) {
oldIE = true;
}
if (oldIE) {
var x = document.getElementsByTagName("div")[0].getAttribute("data-number");
alert("in IE");
alert(x);
} else {
var userinfo = document.querySelector('#user');
alert("NOT in IE");
alert(userinfo.dataset.number);
}
Hope this helps someone else. Thanks everyone for the other suggestions as well.

There are couple of things to check. Lets say this is your script:
<?php $htmlString= 'testing'; //Lets say this is a snippet of your php
?>
<html>
<body>
<script type="text/javascript"><!-- And this is the snippet of your JS -->
// notice the quotes around the ?php tag
var htmlString="<?php echo $htmlString; ?>"; //Make sure there's double
//quotes around your php
alert(htmlString);
</script>
</body>
</html>
Make sure you have PHP and JS in a file called .php. If its an external .js file, php inside it will not work (you can rename the JS file to a .php extension if you have it set up that way)
Also make sure you have the html, php and js setup the way above. There has to be double quotes around php, for example:
var userIDnum = <?php echo json_encode($userIDnum); ?>;
change this to below:
var userIDnum = "<?php echo json_encode($userIDnum); ?>";

Facing trouble to insert php variable in javascript code

I'm trying to insert php variable in a javascript code but unable to get the result. Code is:
<?php $twitterusername = get_option_tree( 'twitter_name', '', 'true' );?>
<script type="text/javascript">document.write(unescape("%3Cscript src='http://twitterforweb.com/twitterbox.js?username=$twitterusername&settings=0,1,2,248,279,ffffff,0,c4c4c4,101010,1,1,336699' type='text/javascript'%3E%3C/script%3E"));</script>
Actually my text editor is not marking $twitterusename inside the script as valid php code. Please help me out.

Try this:
<script type="text/javascript">document.write(unescape("%3Cscript src='http://twitterforweb.com/twitterbox.js?username=<?php echo $twitterusername;?>settings=0,1,2,248,279,ffffff,0,c4c4c4,101010,1,1,336699' type='text/javascript'%3E%3C/script%3E"));</script>
As it's a PHP variable, you need to echo it out with PHP, not javascript.
So you need to replace
$twitterusername
with
<?php echo $twitterusername; ?>
Even though it's inside the <script> tags, it's going to echo out whatever $twitterusername is as long as it's in PHP tags.
If your server supports shortcode, you could use
<?=$twitterusername;?>
making it slightly shorter.
<script type="text/javascript">document.write(unescape("%3Cscript src='http://twitterforweb.com/twitterbox.js?username=<?=$twitterusername;?>settings=0,1,2,248,279,ffffff,0,c4c4c4,101010,1,1,336699' type='text/javascript'%3E%3C/script%3E"));</script>

It is not valid php code, you need to mark it as so using <?php echo $twitterusername; ?>.
Your final code would look like:
<?php $twitterusername = get_option_tree( 'twitter_name', '', 'true' );?>
<script type="text/javascript">document.write(unescape("%3Cscript src='http://twitterforweb.com/twitterbox.js?username=<?php echo $twitterusername; ?>&settings=0,1,2,248,279,ffffff,0,c4c4c4,101010,1,1,336699' type='text/javascript'%3E%3C/script%3E"));</script>

You need to use php tags (<? ?>) to insert variable.
<script type="text/javascript">document.write(unescape("%3Cscript src='http://twitterforweb.com/twitterbox.js?username=<?=$twitterusername?>&settings=0,1,2,248,279,ffffff,0,c4c4c4,101010,1,1,336699' type='text/javascript'%3E%3C/script%3E"));</script>

It's because you are using your PHP variable outside PHP tags.

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