How can the header() function in PHP be used to redirect to a different URL within an IF statement?

When using the header() function in PHP to redirect to a different URL within an IF statement, you need to make sure that no output has been sent to the browser before calling the header() function. This is because the header() function must be called before any actual output is sent to the browser. To achieve this, you can use output buffering to capture any output and prevent it from being sent until after the header() function is called. 

<?php
ob_start(); // Start output buffering

// Your conditional statement
if ($condition) {
    header("Location: http://www.example.com");
    exit(); // Make sure to exit after the redirect
}

ob_end_flush(); // Flush the output buffer
?>

Keywords

header() PHP redirect URL IF statement

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