2019 – 02 – 22
array_flip()
array_flip (array $array) : array 说明：交换数组中的键和值
$arr = [
‘name’ => ‘ZhangSan’,
‘age’ => 18,
‘gender’ => ‘man’
];
print_r(array_flip($arr));
// output
Array
(
[ZhangSan] => name
[18] => age
[man] => gender
)
array_intersect_assoc()
array_intersect_assoc (array $array1 , array $array2 [, array $…] ) : array 说明：带索引检查数组的交集
$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` 说明：使用键名计算数组的交集
$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 说明：计算数组的交集
$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` 说明：检查数组中是否含有指定的键名 / 索引
$arr1 = [
‘name1’ => ‘ZhangSan’,
‘age’ => 18,
‘gender’ => ‘man’
];
print_r(array_key_exists(‘name1’, $arr1));
// output
boolean(true);