PHP重定向到其他页面，没有空白页面

Question

I have this PHP function for redirect page:

function _IS_Redirect_($url) {
    if(!headers_sent()) {
        //If headers not sent yet... then do php redirect
        header('Location: '.$url);
        exit;
    } else {
        //If headers are sent... do javascript redirect... if javascript disabled, do html redirect.
        echo '<script type="text/javascript">';
        echo 'window.location.href="'.$url.'";';
        echo '</script>';
        echo '<noscript>';
        echo '<meta http-equiv="refresh" content="0;url='.$url.'" />';
        echo '</noscript>';
        exit;
    }
}

Now, when i submit form if form not have error redirect to another page. now i have 2 problem :

• after post submit and when page is redirect i see blank page and then page redirected! how do redirect page without see blank page?
• i need to show success message in new page. how do handle success error to new page ?

how do fix this errors?

Answer 1

If you use a javascript or html refresh redirect, you will always see a blank page. The best solution is to display a message on the page saying that they will be redirected shortly. In your case showing a success message and that they'll be redirected.

Ideally you should never need the js or html redirect. If it's an issue, find a way to rearrange the code so that the redirect happens before any other code is run. And make sure there are no errors causing it.

As for showing a success message on the page the user was redirected to, there's another Stack Overflow Answer that addresses it. The simplest solution in my opinion is to add a GET variable to the end of the url.

header('Location: '.$url.'?success=1'); 

On redirected page

if ( isset($_GET['success']) && $_GET['success'] == 1 )
{
     echo "Success";
}

An alternative solution is to use a session variable. See link to stack overflow question above.