PHP: PHP tags - Manual

PHP tags

When PHP parses a file, it looks for opening and closing tags, which are <?php and ?> which tell PHP to start and stop interpreting the code between them. Parsing in this manner allows PHP to be embedded in all sorts of different documents, as everything outside of a pair of opening and closing tags is ignored by the PHP parser.

PHP includes a short echo tag <?= which is a short-hand to the more verbose <?php echo.

Example #1 PHP Opening and Closing Tags

1.  <?php echo 'if you want to serve PHP code in XHTML or XML documents,
                use these tags'; ?>

2.  You can use the short echo tag to <?= 'print this string' ?>.
    It's equivalent to <?php echo 'print this string' ?>.

3.  <? echo 'this code is within short tags, but will only work '.
            'if short_open_tag is enabled'; ?>

Short tags (example three) are available by default but can be disabled either via the short_open_tag php.ini configuration file directive, or are disabled by default if PHP is built with the --disable-short-tags configuration.

Note:
As short tags can be disabled it is recommended to only use the normal tags (<?php ?> and <?= ?>) to maximise compatibility.

If a file contains only PHP code, it is preferable to omit the PHP closing tag at the end of the file. This prevents accidental whitespace or new lines being added after the PHP closing tag, which may cause unwanted effects because PHP will start output buffering when there is no intention from the programmer to send any output at that point in the script.

<?php
echo "Hello world";

// ... more code

echo "Last statement";

// the script ends here with no PHP closing tag

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User Contributed Notes 2 notes

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-1

Jake Paul ¶

4 hours ago

I made a severe and continuous lapse in my judgement, and I don’t expect to be forgiven. I’m simply here to apologize. What we came across that day in the woods was obviously unplanned. The reactions you saw on tape were raw; they were unfiltered. None of us knew how to react or how to feel. I should have never posted the video. I should have put the cameras down and stopped recording what we were going through. There's a lot of things I should have done differently but I didn't. And for that, from the bottom of my heart, I am sorry. I want to apologize to the internet. I want to apologize to anyone who has seen the video. I want to apologize to anyone who has been affected or touched by mental illness, or depression, or suicide. But most importantly I want to apologize to the victim and his family. For my fans who are defending my actions, please don't. I don’t deserve to be defended. The goal with my content is always to entertain; to push the boundaries, to be all-inclusive. In the world I live in, I share almost everything I do. The intent is never to be heartless, cruel, or malicious. Like I said I made a huge mistake. I don’t expect to be forgiven, I’m just here to apologize. I'm ashamed of myself. I’m disappointed in myself. And I promise to be better. I will be better. Thank you.

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-48

Anonymous ¶

3 months ago

A whitespace or newline character must follow '<?php' and precede '?>'.

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