如何从php调用JavaScript函数，将我重定向到另一个php文件

Question

I'm trying to call jsfunction() from php. This jsfunction() will redirect me to code.php. But, it's not working and not showing any error.

<?php
    $sid=$_GET['link'];
    echo '<script type="text/javascript">';
    echo  'jsfunction();';
    echo   '</script>';

?>

<script type="text/javascript"></script>
<script>
    function jsfunction()
    {
        var site_id="<?php echo $sid; ?>";
        window.location.href = "code.php?site_id=" + site_id; 
    }
</script>

Answer 1

As @Deljoei suggested you can redirect user using header. Coming to your question why this isn't working is because jsfunction(); which you are calling before which result in error, because jsFunction is not defined. If you will change your code to

<?php
$sid=$_GET['link'];
?>

<script type="text/javascript"></script>
<script>
    function jsfunction()
    {
        var site_id="<?php echo $sid; ?>";
        window.location.href = "code.php?site_id=" + site_id; 
    }
</script>
<?php
    echo '<script type="text/javascript">';
    echo  'jsfunction();';
    echo   '</script>';
?>

then you will achieve what you want do. Now you when jsFunction is called, it will not give error because it is defined earlier.

Answer 2

You need to use php header for redirecting instead. Use the following code to redirect the user to the specific url :

header('location:code.php?site_id='.$sid);
exit();

Answer 3

You need to declare function before use, try this:

<?php
    $sid=12;

?>

<script type="text/javascript"></script>
<script>
    function jsfunction()
    {
        var site_id="<?php echo $sid; ?>";
        window.location.href = "code.php?site_id=" + site_id; 
    }
</script>

<script type="text/javascript">;
jsfunction();
</script>;

Answer 4

Do like this:

$sid=$_GET['link'];
if($sid){
header('location:code.php?site_id='.$sid);
exit();
}

I hope this helps!

Answer 5

Try this

<?php
    $sid=$_GET['link'];
    echo '<script type="text/javascript">';
    echo  'jsfunction('.$sid.');';
    echo   '</script>';

?>

<script type="text/javascript"></script>
<script>
    function jsfunction(id)
    {
        var site_id=id;
        window.location = "code.php?site_id=" + site_id; 
    }
</script>