Quick Reference
The PHP headers_sent() function checks if/where headers have been sent.
<?php
if (!headers_sent()) {
header("Location: https://www.w3schools.com/");
exit;
}
?>
<html>
<body>Syntax
headers_sent(file, line)Parameters
| Parameter | Description |
|---|---|
| file | If the file and line parameters are set, headers_sent() will put the PHP source file name and line number where output started in the file and line variables |
| line | Specifies the line number where the output started |
PHP Notes:
- When using PHP, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.