PHP Array that creates multiple <li> instances

To apply certain program logic to several elements, it is best to use a loop of some sort - it prevents you from repeating yourself (DRY-Principle - "Don't Repeat Yourself").

PHP knows several loop constructs, while and for being the most common ones. However for arrays, especially if you do only plan to read, not write them, there is an easy looping instruction provided by PHP as well: foreach.

foreach($array as $element) executes everything within the statement's body for every element in $array, the current element is accessible with $element.

So the easiest way for you to solve your problem is, to store every element inside an array, and use said foreach to loop over it (looping over an array is also called iterating over an array).

As your data is more complex than just one value, you cannot store it in an array directly. You first need to structure it in a way that allows you to store all 3 properties of each entry (module_number,module_name,module_url) in one variable.

The easiest option is to use associative arrays. Those are arrays with named keys (instead of numeric indices). YOu could structure each of your entries like this:

$entry = array(); // Since PHP5: $entry = []
$entry['module_number'] = 'NUMBER';
$entry['module_name']   = 'NAME';
$entry['module_url']    = 'URL';

Using array literals this can also be written like this:

$entry = array (
    'module_number' => 'NUMBER',
    'module_name'   => 'NAME',
    'module_url'    => 'URL'
)  // in PHP5+ you can also use [..] instead of array(...) again

Now you can store multiple entries with this exact structure in one array, then use foreach to loop over it (remark: $array[]=$entry prepends a new entry to an existing array, it's equivalent to array_push($array, $entry)):

// create an empty array
$entries  = [];

// add data
$entries[]= [
    'module_number' => 'NUMBER',
    'module_name'   => 'NAME',
    'module_url'    => 'URL'
];
$entries[]= [
    'module_number' => 'NUMBER',
    'module_name'   => 'NAME',
    'module_url'    => 'URL'
];
$entries[]= [
    'module_number' => 'NUMBER',
    'module_name'   => 'NAME',
    'module_url'    => 'URL'
];

// loop over all entries
foreach ($entries as $entry) {
    echo "<li>\n" . $entry['module_number'] . "\n";
    if (($entry['module_number'] * 3 - 1) < $GlobalVariable) {
        echo '<a href="' . $entry['module_url'] . '">' . $entry['module_name'] . "</a>\n";
    } else {
        echo $entry['module_url'] . "\n"
    }
}