【PHP 每日函数】第 02 周期

2019 - 02 - 22array_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));// outputArray( [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));// outputArray( [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));// outputArray( [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));// outputArray( [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));// outputboolean(true);