Setting MIME Types with PHP

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In PHP, the following line of code is used to set the MIME type of a document:

<?php header('Content-type: mimeType'); ?>

For example, to set the MIME type of a document to "application/vnd.wap.xhtml+xml", use the PHP code below:

<?php header('Content-type: application/vnd.wap.xhtml+xml'); ?>

Note that the above PHP code must be placed at the beginning of a document, like this:

<?php header('Content-type: application/vnd.wap.xhtml+xml'); ?>
<?php echo '<?xml version="1.0"?'.'>'; ?>
<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "">

Notice that we cannot include the XML declaration in the markup directly. This is because <? and ?> have special meanings in the PHP language. One solution is to print out the XML declaration using the PHP code:

<?php echo '<?xml version="1.0"?'.'>'; ?>

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