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@NogDogMar 07.2021 — #The only problem would be white-space before the opening
Both
Therefore those commands do not necessarily have to be the very first thing, and you can have other PHP code execute before either/both of them before they get executed, _as long as none of that code causes output to be sent._ Note that "output" is not just things that PHP might
No, that just prevents one possible cause of a "headers already sent" error. It is not a cure-all.
https://www.php.net/manual/en/header (Yep, that pesky old official PHP manual):
"The optional replace parameter indicates whether the header should replace a previous similar header, or add a second header of the same type. By default it will replace, but if you pass in false as the second argument you can force multiple headers of the same type."
The header won't actually be sent until either output is generated or you exit the script (and essentially empty output is sent). In any case, if your logging and such is taking long enough that any human user would notice the difference, there's something wrong with that logging code.
PHP Redirect Code Ok ?
Folks,
They say PHP redirect should be on top part of page above all code. They say similar with session_start(). So which one above the other if both in page ?
And how can you add them on the html header tags section when you got no HTML tags in the page like so …
[code]
<?php
session_start();
require(‘Error_Reporting_Template.php’);
require(‘Conn_Template.php’);
$url = $_GET[‘url’];
//DB Insert Record Into Logging Database.
$query = “INSERT into logs(domain,url,anchor,description,keywords) VALUES (?,?,?,?,?)”;
$stmt = mysqli_stmt_init($conn);
mysqli_stmt_prepare($stmt,$query);
mysqli_stmt_bind_param($stmt,’sssss’,$_SESSION[‘domain’],$_SESSION[‘url’],$_SESSION[‘anchor’],$_SESSION[‘description’],$_SESSION[‘keywords’]);
mysqli_stmt_execute($stmt);
header(“Location: $url”);
die();
?>
Is my code lines in right order ?
The code belongs to my tracker.php.
You see, I building Searchengine. Have you seen when Google presents you search results, the result links are not directly linked to the listed websites but to Google tracker ? This way, when you click a link after reading it’s description on the SERP, you first get sent to their tracker that logs the link click before redirecting you to the destination website. I building such a tracker.where the destination link gets logged before you are forwarded to the destination you chose to go by clicking the third party website’s link found on my SERP.
Is my tracker code ok ? Or need to add more security ? If so then what ?
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@NogDogMar 07.2021 — #The only problem would be white-space before the opening <?phpheader()Both
session_start()header()set_cookie()Therefore those commands do not necessarily have to be the very first thing, and you can have other PHP code execute before either/both of them before they get executed, _as long as none of that code causes output to be sent._ Note that "output" is not just things that PHP might
echo<?php ... ?><?php?>0
@NogDogMar 07.2021 — #>@developer_web#1628982 So if I exclude the closing PHP tags on my files that get included, I won't get any errors ? Are you sure ?
No, that just prevents one possible cause of a "headers already sent" error. It is not a cure-all.
>@developer_web#1628984 What's the TRUE part for ?
"The optional replace parameter indicates whether the header should replace a previous similar header, or add a second header of the same type. By default it will replace, but if you pass in false as the second argument you can force multiple headers of the same type."
>@developer_web#1628988 That way, as soon as the page loads the user is redirected
The header won't actually be sent until either output is generated or you exit the script (and essentially empty output is sent). In any case, if your logging and such is taking long enough that any human user would notice the difference, there's something wrong with that logging code.