How important is it to specify the correct content type when using the header() function in PHP?

It is important to specify the correct content type when using the header() function in PHP because it tells the browser how to handle the response from the server. If the content type is not set correctly, the browser may not display the content properly or may not be able to interpret it at all. To specify the correct content type, you can use the header() function with the "Content-Type" parameter followed by the appropriate MIME type for the content you are sending. 

<?php
// Set the content type to text/html
header('Content-Type: text/html');

// Rest of your PHP code here
?>

Keywords

header function content type PHP HTTP headers MIME types

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