LiteXiv/include/truncated_text.php

<?php
function render_truncated_text($content) {
	if (strlen($content) < 400 || substr_count($content, '<br />') < 8) {
		echo $content;
		return;
	} ?>

	<input type="checkbox" class="expand-checkbox" id="expand" autocomplete="off" />

	<div class="truncated">
		<?= $content ?>
	</div>

	<p class="center">
		<label class="expand-button" for="expand"><?= get_string('expand') ?></label>
	</p><?php
}