What are some best practices for avoiding duplicate output when working with arrays in PHP?

When working with arrays in PHP, one common issue is dealing with duplicate output. To avoid this, one best practice is to use the `array_unique()` function, which removes duplicate values from an array. This function ensures that only unique values are displayed, preventing duplicate output. 

// Example array with duplicate values
$array = [1, 2, 2, 3, 4, 4, 5];

// Remove duplicate values from the array
$uniqueArray = array_unique($array);

// Output the unique values
foreach ($uniqueArray as $value) {
    echo $value . " ";
}

Keywords

array_unique array_values array_flip array_merge array_intersect

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