Select a checkbox by default - php

Question

I know that this question has been asked before, but I am struggling with selecting a default checkbox. I want the checkbox to be "Kenyan Used" by default as in the picture below:Selected "Kenyan Used. What i have tried is $taxonomy= $wpdb->get_results("SELECT term_id FROM par_taxonomy WHERE (taxonomy = 'condition' AND term_taxonomy_id= '181')");. Though I don't how the below code implements this, I know it is a for loop, but how do i modify it to work for my case?. Below is the specific code from where the taxonomies are fetched from:
<?php
if (!empty($modern_filter)){ $counter = 0;
foreach ($modern_filter as $modern_filter_unit) {
$counter++;
$terms = get_terms(array($modern_filter_unit['slug']), $args);
if (empty($modern_filter_unit['slider']) && $modern_filter_unit['slug'] != 'price') { /*<!--If its not price-->*/
//if ($modern_filter_unit['slug'] != 'price') { /* != 'price'<!--If its not price-->*/
/*First one if ts not image goes on another view*/
if ($counter == 1 and empty($modern_filter_unit['use_on_car_modern_filter_view_images'])
and !$modern_filter_unit['use_on_car_modern_filter_view_images']) {
if (!empty($terms)) { ?>
<div class="stm-accordion-single-unit <?php echo esc_attr($modern_filter_unit['slug']); ?>">
<a class="title" data-toggle="collapse"
href="#<?php echo esc_attr($modern_filter_unit['slug']) ?>" aria-expanded="true">
<h5><?php esc_html_e($modern_filter_unit['single_name'], 'motors'); ?></h5>
<span class="minus"></span>
</a>
<div class="stm-accordion-content">
<div class="collapse in content" id="<?php echo esc_attr($modern_filter_unit['slug']); ?>">
<div class="stm-accordion-content-wrapper">
<?php foreach ($terms as $term): ?>
<?php if (!empty($_GET[$modern_filter_unit['slug']]) and $_GET[$modern_filter_unit['slug']] == $term->slug) { ?>
<script type="text/javascript">
jQuery(window).load(function () {
var $ = jQuery;
$('input[name="<?php echo esc_attr($term->slug . '-' . $term->term_id); ?>"]').click();
$.uniform.update();
});
</script>
<?php } ?>
<div class="stm-single-unit">
<label>
<input type="checkbox"
name="<?php echo esc_attr($term->slug . '-' . $term->term_id); ?>"
data-name="<?php echo esc_attr($term->name); ?>"
/>
<?php echo esc_attr($term->name); ?>
</label>
</div>
<?php endforeach; ?>
</div>
</div>
</div>
</div>
<?php } ?>
Thanks for the help in advance.

Answer 1

Assuming that this is the checkbox you want to do this for: Add an if statement to determine if the checkbox should be checked by default
<input type="checkbox"
name="<?php echo esc_attr($term->slug . '-' . $term->term_id); ?>"
data-name="<?php echo esc_attr($term->name); ?>"
<?php if($condition){?> checked <?php } ?>
/>
Replace $condition with something to determine if this is the checkbox you want checked by default. If you want all checkbox checked by default just add 'checked' inside the input tag without any if statements.

Answer 2

You need to add the checked attribute to your checkbox. You can check for the required term with an if statement. You need to add the following:
<?php if ($term->name == 'Kenyan Used') { echo ' checked'; } ?>
So then your input code looks like this:
<input type="checkbox"
name="<?php echo esc_attr($term->slug . '-' . $term->term_id); ?>"
data-name="<?php echo esc_attr($term->name); ?>"
<?php if ($term->name == 'Kenyan Used') { echo ' checked'; } ?> />
<?php echo esc_attr($term->name); ?>
Hope this helps!