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array_unique

array_unique

Removes duplicate values from an array

array **array_unique** array $array int $flags

Takes an input and returns a new array without duplicate values. array

Note that keys are preserved. If multiple elements compare equal under the given , then the key and value of the first equal element will be retained. flags

Opmerking: > Two elements are considered equal if and only if , i.e. when the string representation is the same, the first element will be used. (string) $elem1 === (string) $elem2

arrayThe input array.

flags The optional second parameter may be used to modify the comparison behavior using these values: flags

   Comparison type flags:
   
  - - compare items normally          (don't change types)`SORT_REGULAR`
    • compare items numericallySORT_NUMERIC
    • compare items as stringsSORT_STRING
    • compare items as strings, based on the current locale. SORT_LOCALE_STRING

Returns the filtered array.

Voorbeeld: example

<?php

$input = ["a" => "green", "red", "b" => "green", "blue", "red"];
$result = array_unique($input);
print_r($result);

?>

Array
(
    [a] => green
    [0] => red
    [1] => blue
)

Voorbeeld: and types

<?php

$input = [4, "4", "3", 4, 3, "3"];
$result = array_unique($input);
var_dump($result);

?>

array(2) {
  [0] => int(4)
  [2] => string(1) "3"
}

Opmerking: > Note that is not intended to work on multi dimensional arrays. array_unique

array_count_values

Vorige ← array_uintersect Volgende array_unshift →

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