Using the theme folder file with the extension .info

E.g., sites/all/themes/bootstrap_subtheme

bootstrap_subtheme.info

considering, sites/all/libraries is the path for the fontawesome library:

https://api.drupal.org/api/drupal/includes%21menu.inc/function/menu_tree...

<h3>
<?php
$menu_object = menu_load('main-menu');
echo t($menu_object['title']);

?>
</h3>

<?php
$tree = menu_tree_all_data('main-menu');

<h3>
            <?php
            $menu_object = menu_load('main-menu');
            echo t($menu_object['title']);

            ?>
          </h3>
          
           <?php
 $tree =  menu_tree_all_data('main-menu');
 
$output = '<ul>';
foreach ($tree as $item) {
  $menu_link = $item['link'];
 
  if($menu_link['hidden'] != 1) {
  $link = sprintf('<a href="/%s" title="%s">%s</a>', $menu_link['link_path'], $menu_link['link_title'], $menu_link['link_title']);

<h2><?php echo taxonomy_vocabulary_machine_name_load('tags')->name; ?></h2>
<?php
function taxonomy_get_nested_tree($terms = array(), $max_depth = NULL, $parent = 0, $parents_index = array(), $depth = 0) {
if (is_int($terms)) {
$terms = taxonomy_get_tree($terms);
}

<?php
if (arg(0) == 'node' && is_numeric(arg(1))) {
$nid = arg(1);

$node = node_load($nid);
$field_name = 'field_video';
$invoked_video = field_get_items('node', $node, $field_name);

if ($format = 'url') {
$video_url = file_create_url($invoked_video[0]['uri']);

} else {
$video_url = $invoked_video[0][$format];
}

$ffprobe = "/opt/ffmpeg/ffprobe";
$options =" -show_entries format=duration -v quiet -of csv='p=0'";

https://trac.ffmpeg.org/wiki/PHP
<?php
echo "Starting ffmpeg...\n\n";
echo shell_exec("ffmpeg -i input.avi output.avi &");
echo "Done.\n";
?>

<?php
if (arg(0) == 'node' && is_numeric(arg(1))) {
$nid = arg(1);

$node = node_load($nid);
$field_name = 'field_video';
$invoked_video = field_get_items('node', $node, $field_name);

<?php

$nid = your_node_number;

$node = node_load($nid);
$view = node_view($node, 'default');
print $rendered = drupal_render($view);

?>

<?php

$nid = your_node_number;
$node = node_load($nid);
$field_name = 'name_of_field';
$invoked_field = field_get_items('node', $node, $field_name);

if ($format == 'url') {
print file_create_url($invoked_field[0]['uri']);
} else {

print $invoked_field[0][$format];
}

?>

Example of showing a View only for the Mobile version of website (through Mobile Detect)

1. Contextual filter -> ADD: "Global:Null"
   
    
2. Executing term of the rendering of a view

Declare exactly via

query string param

<?php

if ($_GET['q'] == 'user') {
 return TRUE;            
}
else {
return FALSE;
}

?>

Declare through the obtaining of the URI parts