How can PHP developers optimize their code to prevent the occurrence of empty spaces in arrays when working with database data?

When working with database data in PHP, developers can optimize their code by using functions like array_filter() to remove empty spaces from arrays. This can help prevent issues such as unexpected empty values being included in the array, which can affect the functionality of the code. 

// Example code snippet to remove empty spaces from an array of database data
$data = ["John", "", "Doe", " ", "Smith", null, ""];

// Remove empty values from the array
$data = array_filter($data, function($value) {
    return $value !== "" && $value !== " ";
});

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

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