if(condition1)

{

header(”Location:dummy.php?err=1″);

}

else

{

header(”Location:dummy.php?err=2″);

}

if(condition2)

{

header(”Location:dummy.php?err=3″);

}

else

{

header(”Location:dummy.php?err=4″);

}

a contition may fullfill both condition 1 and 2. But in this case I want to go through the first if clause. I run the script and saw that the final page is dummy.php?err=3. But I supposed to get err=1. The question is why this happened? I found its answer. The first condition is fullfilled and the page is directed to dummy.php?err=1, the script does not exit, rather it run from where it was redirected. Then the second condtion is fullfilled. So the page is redirected again to dummy.php?err=3.

The solution is to use exit() function after each header() function so that the script cannot run further after redirection.

The correct code will be,

if(condition1)

{

header(”Location:dummy.php?err=1″);

exit();

}

else

{

header(”Location:dummy.php?err=2″);

exit();

}

if(condition2)

{

header(”Location:dummy.php?err=3″);

exit();

}

else

{

header(”Location:dummy.php?err=4″);

exit();

}