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I have a question about " and ' in PHP. I have to put a complete <li> element into a PHP variable but this doesn't work, the output is completely false...
$list =
"
<li class=\"<?php if($info[1] < 700) {echo \"half\";} else {echo \"full\";} ?>\">
<div class=\"onet-display\">
<?php if ($image = $post->get('image.src')): ?>
<a class=\"onet-display-block\" href=\"<?= $view->url('@blog/id', ['id' => $post->id]) ?>\"><img class=\"onet-thumb\" src=\"<?= $image ?>\" alt=\"<?= $post->get('image.alt') ?>\"></a>
<?php endif ?>
<h1 class=\"onet-thumb-title\"><a href=\"<?= $view->url('@blog/id', ['id' => $post->id]) ?>\"><?= $post->title ?></a></h1>
<div class=\"uk-margin\"><?= $post->excerpt ?: $post->content ?></div>
</div>
</li>
";
Is it because there is PHP Content in the HTML Code? How can I solve this?
Can someone help me and explain why this doesn't work?
<?php ... <?phpSince your string contains PHP tags, I suppose you expect them to be evaluated. The opening PHP tag within another PHP tag is interpreted as a part of the PHP code. For example, the following outputs <?php echo time();:
<?php echo "<?php echo time();";
There are several ways to build a PHP string from PHP expressions.
You can create functions returning strings and concatenate the calls to them with other strings:
function some_function() {
return time();
}
$html = "<li " . some_function() . ">";
or use sprintf:
$html = sprintf('<li %s>', some_function());
Another way is to use eval, but I wouldn't recommend it as it allows execution of arbitrary PHP code and may cause unexpected behavior.
If you are running PHP as a template engine, you can use the output control functions, e.g.:
<?php ob_start(); ?>
<li data-time="<?= time() ?>"> ...</li>
<?php
$html = ob_get_contents();
ob_end_clean();
echo $html;
Output
<li data-time="1483433793"> ...</li>
If, however, the string is supposed to be assigned as is, use the here document syntax:
$html = <<<'HTML'
<li data-time="{$variable_will_NOT_be_parsed}">...</li>
HTML;
or
$html = <<<HTML
<li data-time="{$variable_WILL_be_parsed}">...</li>
HTML;
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