Inline PHP in Snippets

<?php
...some php code...
?>

<a href="<?php echo $link; ?>">link text</a>

<?php
...some more php code...
?>

<a href="
<?php
echo $link;
?>">link text</a>

<?php

$output = 'HTML CODE';

// php code

$output .= 'MORE HTML CODE';

//php code

return $output;
?>

$modx->runSnippet()

// Use a chunk, and within this chunk, use placeholders to output any dynamic data.
// What we're doing here is first to set the placeholders, and then we're returning the chunk with the edited placeholders.
 
// Set placeholders:
$modx->setPlaceholder('link', $linkUrl);		
$modx->setPlaceholder('lastvisit', $varLastvisit);
 
// Return the chunk
return $modx->getChunk('NameOfChunk');

// Set placeholders-array:
$ph_array['linkUrl']='yourlinkurlstring';
$ph_array['lastvisit']='yourlastvisitvalue';

return $modx->parseChunk('nameOfChunk', $ph_array, '[+', '+]');

<?php
echo <<<END
<!-- some html -->
END;

// more php here

echo <<<END
<!-- some html -->
END;
?>

<?php
echo '
<!-- some html -->
';

// more php here

echo '
<!-- some html -->
';
?>