Can not display alert message using PHP

Question

I have one issue while trying to display alert message using PHP.I am explaining my code below.

<?php
if($id){
      $message = "Added successfully.";
      echo "<script type='text/javascript'>alert('$message');</script>";
      header("location:http://localhost/crm_complain/index.php");
  }else{
      $message = "Unable to add.\\nTry again.";
     echo "<script type='text/javascript'>alert('$message');</script>";
      header("location:http://localhost/crm_complain/index.php");
  }
?>

Here my problem is the alert message box is not working at all.I need inside the if/else condition the alert message should work.Please help me.

how come you echo before sending out a header? Enable Error reporting... — Nouphal.M
– Nouphal.M, Commented Jan 20, 2016 at 10:52
You cannot print something and redirect using header. If PHP can send the header, the user won't see the printed message. So either redirection OR printing message. — Charlotte Dunois
– Charlotte Dunois, Commented Jan 20, 2016 at 10:55
If i am not redirecting to header the post data is submitting again again at each page reload.My aim is i have to display the alert message and then i will redirect to orginal page. — satya
– satya, Commented Jan 20, 2016 at 11:02

Erik Kalkoken · Accepted Answer · 2016-01-20 11:01:31Z

1

The alert message works fine, but the header does not. If you want to redirect after the alert message, try this:

die('<script>location.href = "'. $url .'"</script>');

answered Jan 20, 2016 at 11:01

Erik Kalkoken

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2 Comments

satya Over a year ago

what this $url contains.

Erik Kalkoken Over a year ago

any url. you can of course also hard code it like this: die('<script>location.href = "page.html"</script>');

devpro · Accepted Answer · 2016-01-20 11:26:04Z

0

You can not get alert as like that because you are using header(). You can resolve this as:

Your PHP Code (pass success status):

<?php
if($id)
{
    //$message = "Added successfully.";
    header("location:http://localhost/crm_complain/index.php?success=1"); // success status
}
else
{
    //$message = "Unable to add.\\nTry again.";
    header("location:http://localhost/crm_complain/index.php?success=0"); // failure status
}
?>

You need to add following code in index.php file for getting alerts:

<script type="text/javascript"> 
    var phpVar = "<?php if(isset($_GET['success'])) {echo $_GET['success'];} else { echo ""; } ?>";
    if(phpVar == 1){
        alert('Added successfully.');
    }
    else if(phpVar == 0){
        alert('Unable to add.\\nTry again.');   
    }
    else{
        // nothing
    }
</script>

edited Jan 20, 2016 at 11:26

answered Jan 20, 2016 at 11:02

devpro

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2 Comments

satya Over a year ago

@ devpro : But as per you each time of reload the else part alert is coming.

satya Over a year ago

No,same issue but it resolved by checking phpVar == 0 && phpVar!=' '.

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