資訊專欄INFORMATION COLUMN
摘要：說明交換數(shù)組中的鍵和值說明帶索引檢查數(shù)組的交集說明使用鍵名計(jì)算數(shù)組的交集說明計(jì)算數(shù)組的交集說明檢查數(shù)組中是否含有指定的鍵名索引
2019 - 02 - 22 array_flip()
array_flip ( array $array ) : array
說明：交換數(shù)組中的鍵和值
$arr = [
"name" => "ZhangSan",
"age" => 18,
"gender" => "man"
];
print_r(array_flip($arr));
// output
Array
(
[ZhangSan] => name
[18] => age
[man] => gender
)
array_intersect_assoc()
array_intersect_assoc ( array $array1 , array $array2 [, array $... ] ) : array
說明：帶索引檢查數(shù)組的交集
$arr1 = [
"name" => "ZhangSan",
"age" => 18,
"gender" => "man"
];
$arr2 = [
"name" => "ZhangSan",
"age1" => 18,
"gender" => "woman",
];
print_r(array_intersect_assoc($arr1, $arr2));
// output
Array
(
[name] => ZhangSan
)
array_intersect_key()
`array_intersect_key ( array $array1 , array $array2 [, array $... ] ) : array
`
說明：使用鍵名計(jì)算數(shù)組的交集
$arr1 = [
"name" => "ZhangSan",
"age" => 18,
"gender" => "man"
];
$arr2 = [
"name" => "ZhangSan",
"age1" => 18,
"gender" => "woman",
];
print_r(array_intersect_key($arr1, $arr2));
// output
Array
(
[name] => ZhangSan
[gender] => man
)
array_intersect()
array_intersect ( array $array1 , array $array2 [, array $... ] ) : array
說明：計(jì)算數(shù)組的交集
$arr1 = [
"name1" => "ZhangSan",
"age" => 18,
"gender" => "man"
];
$arr2 = [
"name" => "ZhangSan",
"age1" => 18,
"gender" => "woman",
];
print_r(array_intersect($arr1, $arr2));
// output
Array
(
[name1] => ZhangSan
[age] => 18
)
array_key_exists()
`array_key_exists ( mixed $key , array $array ) : bool
`
說明：檢查數(shù)組中是否含有指定的鍵名/索引
$arr1 = [
"name1" => "ZhangSan",
"age" => 18,
"gender" => "man"
];
print_r(array_key_exists("name1", $arr1));
// output
boolean(true);
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