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How can I comment out PHP lines inside HTML file?

In the middle my HTML code, I have a line of PHP. now, I want to make PHP line as a comment. I tried to ues <!-- --> but it seems not work for PHP.

What should I do?

Thanks

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Answer

Imagine you have the following code:

<body>
    <?php echo $this_variable_will_echo_a_div; ?>
</body>

If you want the div to be echoed but not displayed at the page, you’ll comment html, PHP still gets executed:

<body>
    <!-- <?php echo $this_variable_will_echo_a_div; ?> -->
</body>

If you don’t want the div to appear at the source as commented html, you’ll have to comment php, nothing will appear between the body tags at your source:

<body>
    <?php /* echo $this_variable_will_echo_a_div; */ ?>
</body>
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