php tags in .js file

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How do I enter a in a .js file. This is a jquery app, therefore the js file.

Thanks Jean

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4条回答

忘掉有多难

2020-12-15 02:46

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;

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礼貌的吻别

2020-12-15 02:47

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

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礼貌的吻别

2020-12-15 02:52
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.
1. 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.
2. GZIP! I'm significantly reducing the size of the file be transferred and that speeds things up for the visitor.
3. It's a central location to add, remove, or modify my JavaScript for the whole site. I can even use $_GET checks 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.
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独厮守ぢ

2020-12-15 03:01
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.
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