Is there an alternative to Header to redirect to another script

[rocky48]

I am trying to find a way to check if a user has already entered their email address in my MySQL database.

If they have an entry then it jumps to another script that avoids the questionnaire, but if they have no entry, then they do the questionnaire.

 

I have tried using

 

header('Location: /questionnaire.html');

but I get this error warning:

 

Warning: Cannot modify header information - headers already sent by (output started at /homepages/43/d344817611/htdocs/Test/questionnaire_connect.php:14) in /homepages/43/d344817611/htdocs/Test/eCheck.php on line 16

 

The script I am using:

<?php
include('questionnaire_connect.php');
doDB12();

	if ($_POST["email"] == "") {
		header("Location: emailChecker.html");
		exit;
	} else {
		//check that email is in list
		emailChecker($_POST["email"]);

		//get number of results and do action
		if (mysqli_num_rows($check_res) < 1) {
			//free result
			mysqli_free_result($check_res);
         header('Location: /questionnaire.html');
                }else {
        header('Location: /Alt_inputform.html');
                }
        }
    //close connection to MySQL
    mysqli_close($mysqli);
?>

The emailChecker is a function in the DB connect script:

function emailChecker($email) {
	global $mysqli, $check_res;

	//check that email is not already in list
	$check_sql = "SELECT id FROM questionnaire WHERE email = '".$email."'";
	$check_res = mysqli_query($mysqli, $check_sql) or die(mysqli_error($mysqli));
}

Is there another way I can redirect the program flow other than using Header?

[QuickOldCar]

Should write the script that can use header before any output.

 

But can use meta refresh

 

 

<META http-equiv="refresh" content="0;URL=emailChecker.html">

[FraanXT]

You can use that too:

 

die("<script>location.href = 'path_that_you_want.file_extension'</script>");

[mac_gyver]

your goal would be to find and fix what is causing the error.

 

based on where the output is being reported at, line 14 of questionnaire_connect.php, you likely have some white-space after the closing ?> tag in that file or something in questionnaire_connect.php is producing unexpected output. what is on line 14 questionnaire_connect.php?

[rocky48]

Opps! Left an echo on line 14.

Now works fine.