How can one effectively utilize existing examples and resources in PHP forums to solve coding problems?

Issue: I am having trouble sorting an array in PHP based on a specific key value. Solution: You can use the `usort()` function in PHP to sort an array based on a custom comparison function. Here's an example code snippet that sorts an array of associative arrays based on the 'name' key: 

// Sample array
$data = array(
    array('name' => 'Alice', 'age' => 25),
    array('name' => 'Bob', 'age' => 30),
    array('name' => 'Charlie', 'age' => 20)
);

// Custom comparison function
function cmp($a, $b) {
    return strcmp($a['name'], $b['name']);
}

// Sort the array based on the 'name' key
usort($data, 'cmp');

// Output the sorted array
print_r($data);

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