how to combine javascript alert and header in php?

Question

I want to display the javascript alert and the redirect using php. The logical error is that it won't display the javascript alert.

here's my code:

if($sql_update==true){
    echo "<script type='text/javascript'>alert('Updated');</script>";   
    header("location:?tag=student_entry&opr=upd&rs_id=".$_POST['stud_id_txt']."");
}

You can't have output before using php's header(). You'll need to do your redirect in javascript. — John Conde, Sep 21 '15 at 12:44
if I redirect it with javascript the problem would be on how to apply it with POST method. — Jude Howell Sarabia, Sep 21 '15 at 12:46
Switch the order of commands put the header line first. Assuming that you don't print anything before. An alternative is to set php output to be buffered (I would still output the header first, good practice) — Youn Elan, Sep 21 '15 at 12:48
That will not work. The script will not alert when the redirect is issued — mplungjan, Sep 21 '15 at 12:48

score 0 · Answer 1 · answered Sep 21 '15 at 12:48

if your doing embedding js inside php for alert then also use JS redirect inside it

$redirectURL="Your URL";
    print("<script>");
    print("alert('Updated');");
    print("var t =setTimeout(\"window.location='".$redirectURL."';\", 3000);");
   print("</script>");

score 0 · Answer 2 · answered Sep 21 '15 at 12:49

0

You can make an javascript function to help you alert the user and redirect like this:

function alertAndRedirect(studId) {
     alert('Updated');
     window.location = "?tag=student_entry&opr=upd&rs_id="+studId;
}

and in php you call it like this:

if($sql_update==true){
    echo "<script type='text/javascript'>alertAndRedirect(".$_POST['stud_id_txt'].");</script>";
}

answered Sep 21 '15 at 12:49

Alex7

560
3
19

What if the id starts with a letter because I'm going reuse that code for the subject_code which starts with a letter. I tried to use in the subject_code but it doesn't work when the id starts with a letter. – Jude Howell Sarabia Sep 23 '15 at 03:23
should become window.location = "?tag=student_entry&opr=upd&rs_id=' "+studId+" ' "; pay attention to the commas – Alex7 Sep 23 '15 at 07:19

score 0 · Answer 3 · answered Sep 21 '15 at 12:50

You can not provide output before header ,even if you set output buffer on , you will not be able to alert . So do redirection through js.

if($sql_update==true){
    echo "<script type='text/javascript'>alert('Updated');location.href=?tag=student_entry&opr=upd&rs_id=".$_POST['stud_id_txt']."script>";   

}

how to combine javascript alert and header in php?

3 Answers3