Newbie Question on template tags

[totoff]

hello forum,

i've read somewhere in the docs that the use of template tags was given up with the switch from version 1 to 2.

does that mean this code

<li><a$class href='{$child->url}'>{$child->title}</a></li>

as found in the head.inc with the official download is no longer valid? Or is the use of curly brackets a regular use of PHP (I'm very new to PHP unfortunately)?

Wouldn't you rather write

<?php echo $child->url ?>

instead of

{$child->url}

??

thanks, christoph

[apeisa]

Everything you find from processwire.com is valid. Version 1 was closed source system and Ryan only references it on his "background articles".

Curly brackets work only inside php tags already. Your first example should be:

<?php
echo "<li><a$class href='{$child->url}'>{$child->title}</a></li>";
?>

If you are writing pure html then simplest way to output variables is:

<li><a <?= $class ?>href='<?= $child->url ?>'><?= $child->title ?></a></li>

Curly brackets are necessary when going deeper than one level on your objects, like this:

<li><a <?= $class ?>href='<?= {$child->related_page->url} ?>'><?= {$child->related_page->title} ?></a></li>

Hope this helps. PW uses pure PHP as a templating language.

[SiNNuT]

Those curly braces aren't some kind of tags but 'normal' PHP complex string parsing.

http://www.php.net/manual/en/language.types.string.php#language.types.string.parsing.complex

[totoff]

Hope this helps

It does. Thank you very much, both.

[Martijn Geerts]

Think you have a typo, your code is not valid HTML or PHP.

{$child->url}

This is valid, but be aware of the right quotes.

<li><a <?= $class ?>href='<?= $child->url ?>'><?= $child->title ?></a></li>

to be save use <?php echo instead of <?= ( php shorthand )

[apeisa]

<?= and <? will be always enabled from PHP 5.4+ so if you don't need to support some rare shared hosts where shorthands are disabled then those are perfectly safe to use.

Edited August 10, 2012 by apeisa
<?= will be always enabled, <? follows the short_tags setting on php.ini in 5.4+