Before redirecting to a php page alert is not showing

Question

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I want to show one alert saying wrong username and password and then have to redirect to the same page(page1.php"login Form page"). But its not showing. simply it redirects.If i take header function na its showing alert. so help me to find a way

PHP

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row

if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_register("myusername");
session_register("mypassword"); 
header("location:page2.php");
}
else {
echo "<script type='text/javascript'>alert(\"Wrong Username or Password\")</script>";
header("location:page1.php");
}
?>

Posted 9-Mar-12 5:03am

Ashokraj29

Updated 14-Feb-18 19:50pm

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5 solutions

Solution 1

You can't mix a header-based redirect with page content. The header is telling the browser to skip displaying a page and go straight to another page.

Since you are using Javascript to display the alert, why not use it to do the redirect too:

PHP

<script type="text/javascript">
alert("Wrong Username or Password");
location="page1.php";
</script>

Posted 9-Mar-12 5:21am

Graham Breach

Comments

Uday P.Singh 9-Mar-12 11:52am

Agree 5!

Ashokraj29 9-Mar-12 11:58am

Parse error: syntax error, unexpected '=' in C:\wamp\www\login.php on line 26
this is the error when i put location="page1.php";
if i put inside script its also showing error..
can u put ur code in my else condition and explain. I'm new to php

Graham Breach 9-Mar-12 12:28pm

The error is probably because I used double quotes in my answer, and you used double quotes to quote the Javascript in your echo command. Uday's answer shows how to do it more clearly by using single quotes inside the double quotes.

Ashokraj29 9-Mar-12 12:37pm

Thanks Graham. I made one mistake i just put location=\"page1.php\"; forgot to put windows.location.but its taking 1.5 sec to redirect from login.php

Solution 4

How i can customized alert box E.g: colors,font style , bgcolor...

echo "alert(\"Wrong Username or Password\")";
//header("location:page1.php");
include("page1.php");

Posted 1-Mar-17 22:21pm

Member 13033046

Comments

CHill60 2-Mar-17 4:47am

If you have a question of your own then use the Ask a Question link. Do not post questions as solutions to old posts

Solution 5

<?php
header("Refresh: 5; url= index.php");
echo 'Successfully redirecting after 5 seconds.';
?>

Posted 14-Feb-18 19:50pm

Member 13679052

Comments

CHill60 15-Feb-18 5:04am

The question is over 5 years old and already has accepted solutions that work. This is not a good solution.
Stick to answering new posts where the OP still needs help

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Uday P.Singh · Accepted Answer · 2012-03-09T06:11:00

Solution 3

You can try this:

PHP

else {
echo "<script type='text/javascript'>alert('Wrong Username or Password');
window.location='page1.php';
</script>";
}

hope it helps :)

Posted 9-Mar-12 6:11am

Uday P.Singh

Comments

Ashokraj29 9-Mar-12 12:36pm

Hey thanks. Its working but one small minus. Its taking 1.5sec to load from login.php to page1.php after showing alert.

Dilan Kaushalya 4-Dec-15 4:31am

Nice. It is working. Thank you.

Member 14213075 4-Apr-19 6:30am

you save our lives thanks :D

Ashokraj29 · Accepted Answer · 2012-03-09T06:00:00

Solution 2

This is working fine. I checked it. If u guys have any other way na pls inform me.

PHP

else {
echo "<script type='text/javascript'>alert(\"Wrong Username or Password\")</script>";
//header("location:page1.php");
include("page1.php");
}

Posted 9-Mar-12 6:00am

Ashokraj29

Comments

Uday P.Singh 9-Mar-12 12:06pm

but this is the not right way to do it see my answer.

Ashokraj29 9-Mar-12 13:16pm

i checked it with ur answer there is delay in moving from login.php tp page1.php