How Do I Ensure Proper HTTP Header Encoding for W3C Validation in PHP?

Adjusting HTTP Header Encoding for W3C Validation Using PHP

In PHP development, it's common to output HTML content using a meta tag:

<meta http-equiv="Content-type" content="text/html; charset=utf-8">

However, it's crucial to ensure that the HTTP header encoding aligns with the encoding specified within the HTML tag. Failure to do so can result in validation errors from the W3C validator.

To rectify this issue, PHP provides the header() function to modify the HTTP header encoding. To set it to UTF-8, simply use the following code:

header('Content-Type: text/html; charset=utf-8');

Remember to call this function before any output is sent to the client. Otherwise, the header has already been sent, and any changes cannot be made. You can verify this using the headers_sent function. Refer to the PHP manual page for the header function for further details.

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