How can one efficiently remove duplicate entries from multiple arrays in PHP without merging them into a multidimensional array?

To efficiently remove duplicate entries from multiple arrays in PHP without merging them into a multidimensional array, you can combine all arrays into a single array, remove duplicates using the array_unique function, and then split the unique values back into separate arrays. 

// Sample arrays
$array1 = [1, 2, 3, 4];
$array2 = [3, 4, 5, 6];
$array3 = [5, 6, 7, 8];

// Combine all arrays into a single array
$combinedArray = array_merge($array1, $array2, $array3);

// Remove duplicates
$uniqueValues = array_unique($combinedArray);

// Split unique values back into separate arrays
$array1 = array_intersect($uniqueValues, $array1);
$array2 = array_intersect($uniqueValues, $array2);
$array3 = array_intersect($uniqueValues, $array3);

// Output the unique values in each array
print_r($array1);
print_r($array2);
print_r($array3);

Keywords

PHP arrays duplicate entries unique values multidimensional array

Related Questions