PHP 每日函式 第 02 週期

array_flip ( array $array ) : array

說明：交換陣列中的鍵和值

$arr = [

'name' => 'zhangsan',
'age' => 18,
'gender' => 'man'
];print_r(array_flip($arr));
// output
array
( [zhangsan] => name
[18] => age
[man] => gender
)

說明：帶索引檢查陣列的交集

$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
)

`說明：使用鍵名計算陣列的交集

$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
)

說明：計算陣列的交集

$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
)

`說明：檢查陣列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);

PHP 每日函式 第 02 週期

array flip array array array 說明 交換陣列中的鍵和值 arr name zhangsan age 18,gender man print r array flip arr output array zhangsan name 18 age man gender arra...

PHP 每日函式 第 02 週期

array flip array array array 說明 交換陣列中的鍵和值 arr name zhangsan age 18,gender man print r array flip arr output array zhangsan name 18 age man gender arra...

PHP 每日函式 第 02 週期

array flip array array array 說明 交換陣列中的鍵和值 arr name zhangsan age 18,gender man print r array flip arr output array zhangsan name 18 age man gender arra...