How do I enter a <? echo "hello"; ?> in a .js file.
This is a jquery app, therefore the js file.
Thanks Jean
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possible duplicate of Parse a JavaScript file through PHPuser180100– user1801002011-01-27 20:55:56 +00:00Commented Jan 27, 2011 at 20:55
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4 Answers
You would only be able to do this if the PHP interpreter is configured to run on *.js files, which by default it won't be. Quite honestly, I wouldn't recommend this behavior.
What I'd do instead is something like this (This method can be used for CSS files, too.):
<script type="text/javascript" src="js.php"></script>
js.php
<?php
//GZIP the file and set the JavaScript header
ob_start("ob_gzhandler");
header("Content-type: text/javascript");
//Set a JavaScript variable based on PHP work
echo 'var logged_in_user = "'.$_SESSION['username'].'";';
//Require an external script
require_once($_SERVER['DOCUMENT_ROOT']."/path/to/jquery.js");
?>
//More Javascript functions and code here
$(document).ready(function() {
$('#mydiv').tipsy();
});
<?php
//Flush the output buffer
ob_end_flush();
?>
I personally do this for many reason.
I have many jQuery files I want to include, but I don't want my browser doing 5+ HTTP requests. Including them all in one file means less HTTP requests.
GZIP! I'm significantly reducing the size of the file be transferred and that speeds things up for the visitor.
It's a central location to add, remove, or modify my JavaScript for the whole site. I can even use
$_GETchecks to make certain scripts conditional based on how I wrote the<script>tag.For example,
<script type="text/javascript" src="js.php?var=1"></script>. I can then check$_GET['var']within the js.php file.
answered Jan 27, 2011 at 20:57
Michael Irigoyen
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4 Comments
Endophage
This is the best answer of those given. The URL you request doesn't have to have a .js file at the end of it, as long as it returns js with the correct headers (as shown above).
Mike C
Fantastic solution, kills 3 birds with one stone (consolidates js, compresses js, and allows PHP tags in js).
X10nD
@endophage Though I upvoted it, how. It still is not a .js but a .php file. Why do I do this, I can simply do a include of a php file.
asprin
This doesn't seem to work. I tried it with alert and no luck.
You regularly don't use PHP within your JavaScript files. Javascript is a client-side language which is interpreterred in your web browser. PHP is run on the web server.
However, if you need to pass data from your PHP-code to your javascript document, you can do something like:
$js = "<script> myObject = " . json_encode($your_data) . " </script>";
print $js;
If you do this in your <head>-part of your HTML-document, you will have access to myObject in other JS files you load after that.
$your_data can be an array or any kind of object, string or integer. Look for PHP JSON around the interwebs.
Comments
I think is not possible to enter a php in the js file, but: try to create an element div for example or an input ...
and then use this functions to get the value of the div tag.
function AddHiddenValue(oForm) {
var strValue = document.getElementById("city").value;
alert("value: " + strValue);
var oHidden = document.createElement("input");
oHidden.name = "printthisinput";
oHidden.value = strValue;
oForm.appendChild(oHidden);
}
It come from another object form (select .. )
document.getElementById("city").value;
Comments
Ok guys here is the answer
The Q: I want to input a value for a variable into a .js file, php tags are not permitted and the js would throw an error.
The A: write a
<script> <? var value_pass = echo "hello"; ?> </script> before the said .js file
In the said .js file var value=value_pass;
So there is no need to have any of the ob_end_flush.
If this is not viable please let me know.
Thanks Jean
6 Comments
Michael Irigoyen
You did not have your code between two back ticks (`) so it was not displaying.
Michael Irigoyen
This really isn't an answer to the question you posed though. You asked how to print PHP in a JavaScript file, not how to pass information (that doesn't have to come from PHP) into an external JavaScript file.
X10nD
Please check the question again How do I enter a <? echo "hello"; ?> in a .js file
Endophage
@Jean This works? Surely it would need to be <script> var value_pass = "<? echo "hello"; ?>" </script>
Michael Irigoyen
If this is the correct answer, you should select it as being so.
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