75 lines
2.3 KiB
ReStructuredText
75 lines
2.3 KiB
ReStructuredText
###################################
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Alternate PHP Syntax for View Files
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###################################
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If you do not utilize CodeIgniter's :doc:`template
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engine <../libraries/parser>`, you'll be using pure PHP in your
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View files. To minimize the PHP code in these files, and to make it
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easier to identify the code blocks it is recommended that you use PHPs
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alternative syntax for control structures and short tag echo statements.
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If you are not familiar with this syntax, it allows you to eliminate the
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braces from your code, and eliminate "echo" statements.
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Automatic Short Tag Support
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===========================
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.. note:: If you find that the syntax described in this page does not
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work on your server it might be that "short tags" are disabled in your
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PHP ini file. CodeIgniter will optionally rewrite short tags on-the-fly,
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allowing you to use that syntax even if your server doesn't support it.
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This feature can be enabled in your *config/config.php* file.
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Please note that if you do use this feature, if PHP errors are
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encountered in your **view files**, the error message and line number
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will not be accurately shown. Instead, all errors will be shown as
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``eval()`` errors.
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Alternative Echos
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=================
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Normally to echo, or print out a variable you would do this::
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<?php echo $variable; ?>
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With the alternative syntax you can instead do it this way::
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<?=$variable?>
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Alternative Control Structures
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==============================
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Controls structures, like if, for, foreach, and while can be written in
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a simplified format as well. Here is an example using ``foreach``::
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<ul>
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<?php foreach ($todo as $item): ?>
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<li><?=$item?></li>
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<?php endforeach; ?>
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</ul>
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Notice that there are no braces. Instead, the end brace is replaced with
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``endforeach``. Each of the control structures listed above has a similar
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closing syntax: ``endif``, ``endfor``, ``endforeach``, and ``endwhile``
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Also notice that instead of using a semicolon after each structure
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(except the last one), there is a colon. This is important!
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Here is another example, using ``if``/``elseif``/``else``. Notice the colons::
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<?php if ($username === 'sally'): ?>
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<h3>Hi Sally</h3>
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<?php elseif ($username === 'joe'): ?>
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<h3>Hi Joe</h3>
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<?php else: ?>
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<h3>Hi unknown user</h3>
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<?php endif; ?> |