如何通过.get（）从文件中获取变量

Question

A followed several examples, but I just can´t get it to work. After submiting the form I call this function:

function kontrola(){    
var jmeno = self.document.forms.newPassForm.user.value;
    $.get("checkMail.php?mail="+jmeno, function(jeObsazen){ 
        alert(jeObsazen); 
    }); 

return false;  
}

And PHP file, where content of jeObsazen variable is decided looks like this:

<?  
include "protected/_mysql.php";
$mail=$_GET['mail'];
$query = mysql_query("SELECT `id` FROM `users` WHERE `name` = '".$mail."'");
$data=mysql_fetch_array($query);

if($data['id']==NULL) $jeObsazen = false;
else $jeObsazen = true;

?>
<script type="text/javascript" language="JavaScript">
var jeObsazen = <?echo $jeObsazen;?>
</script>

Only thing I want is to show in alert window, if variable jeObsazen is true or false. Now it alerts everything in tags, included. Am I asking too much? :))

Thank you in advance for every help!

Answer 1

Try to return something from your PHP script:

<?  
include "protected/_mysql.php";
$mail=$_GET['mail'];
$query = mysql_query("SELECT `id` FROM `users` WHERE `name` = '".$mail."'");
$data=mysql_fetch_array($query);

if($data['id']==NULL) $jeObsazen = false;
else $jeObsazen = true;

echo $jeObsazen;
?>

And be aware jeObsazen in javascript will be a string, not a boolean