How can the PHP manual be utilized to enhance understanding of PHP functions?

The PHP manual is a valuable resource for understanding PHP functions as it provides detailed explanations, examples, and user-contributed notes. By referencing the manual, developers can gain insights into how functions work, their parameters, return values, and potential use cases. This can help enhance understanding and improve the effectiveness of utilizing PHP functions in code.

```php
// Example of using the PHP manual to understand the array_push function
$array = [1, 2, 3];
array_push($array, 4);
print_r($array);
```

In this code snippet, the array_push function is used to add a new element (4) to the end of the existing array. By referencing the PHP manual for array_push, developers can learn about its usage, syntax, and behavior, which can aid in effectively using the function in their code.