PHP表单提交，强制CSS重新加载？

问题描述：

I have a PHP form that I need to force a CSS reload once submitted. How do I do this?

Thanks!

我有一个PHP表单，我需要在提交后强制重新加载CSS。我该怎么做？ p>

谢谢！ p> div>

答

The only way I can think of to guarantee that the CSS reloads, is to change the name of the css file.

You could create a rewrite rule that redirects all addresses of type "...mycssfile.css1234" to "...mycssfile.css" and in your php, add a random 4 digits to the end of your css file location.

Edit: To reflect the comments to this answer, you can do the following:

<link rel="STYLESHEET" href="mycssfile.css?r=<?php echo rand(1, 999999); ?>" type="text/css">

Which would force the browser to update the css page, since the address to the css file changed, although it will actually link to the same css file.

答

Is there some reason the whole page can't reset? Because if that's okay, then the form could just submit to the page itself, with an action of get, and the (dropdown|input|radio button) submitted as an argument (something like "css").

When the page loads, PHP can check for the variable:

$css = empty($_GET['css']) ? $_GET['css'] : 'default';

Then, it can echo the stylesheet's href based on that variable:

<link href="<?php echo htmlspecialchars($css, ENT_QUOTES, 'UTF-8') ?>.css" ... />

答

You can do it via Javascript.

<form id="form" onsubmit="cssChange()" action=".....

For example cssChange function :

     function cssChange() {

         var a = document.getElementsByTagName('link');
         var random = Math.floor(Math.random()*11);
         if(a.getAttribute('rel') == 'css')
             {
                    a.attr('src', 'new-css.css?' + random);
             }

     }

And you can define .newClass class on your css file.

PHP表单提交，强制CSS重新加载？

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