PHP 에서 배열의 중복값 제거 함수 array_unique
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작성자 관리자 (110.♡.0.34) 작성일 21-04-12 20:34 조회 2,590 댓글 0본문
PHP 에서 배열의 중복값을 제거하는 함수로 array_unique 가 있다.
이 함수는 다차원 배열의 중복값도 제거할 수 있다.
$newArray = array_unique($tmpArray, SORT_REGULAR);
https://www.php.net/manual/en/function.array-unique.php
# array_unique
(PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8)
array_unique — Removes duplicate values from an array
Description ¶
array_unique ( array $array , int $flags = SORT_STRING ) : array
Takes an input array and returns a new array without duplicate values.
Note that keys are preserved. If multiple elements compare equal under the given flags, then the key and value of the first equal element will be retained.
Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2 i.e. when the string representation is the same, the first element will be used.
Parameters ¶
array
The input array.
flags
The optional second parameter flags may be used to modify the sorting behavior using these values:
Sorting type flags:
SORT_REGULAR - compare items normally (don't change types)
SORT_NUMERIC - compare items numerically
SORT_STRING - compare items as strings
SORT_LOCALE_STRING - compare items as strings, based on the current locale.
Return Values ¶
Returns the filtered array.
## 참고
https://www.php.net/manual/en/function.array-unique.php
https://zxchsr.tistory.com/103
이 함수는 다차원 배열의 중복값도 제거할 수 있다.
$newArray = array_unique($tmpArray, SORT_REGULAR);
https://www.php.net/manual/en/function.array-unique.php
# array_unique
(PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8)
array_unique — Removes duplicate values from an array
Description ¶
array_unique ( array $array , int $flags = SORT_STRING ) : array
Takes an input array and returns a new array without duplicate values.
Note that keys are preserved. If multiple elements compare equal under the given flags, then the key and value of the first equal element will be retained.
Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2 i.e. when the string representation is the same, the first element will be used.
Parameters ¶
array
The input array.
flags
The optional second parameter flags may be used to modify the sorting behavior using these values:
Sorting type flags:
SORT_REGULAR - compare items normally (don't change types)
SORT_NUMERIC - compare items numerically
SORT_STRING - compare items as strings
SORT_LOCALE_STRING - compare items as strings, based on the current locale.
Return Values ¶
Returns the filtered array.
## 참고
https://www.php.net/manual/en/function.array-unique.php
https://zxchsr.tistory.com/103
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