php array函数

PHP array()函数 (PHP array() Function)

array() function is a predefined function in PHP, it is used to create an array of the elements, array of the arrays etc.

array()函数是PHP中的预定义函数，用于创建元素数组，数组数组等。

By using array() function, we can create two types of arrays,

通过使用array()函数 ，我们可以创建两种类型的数组，

1. Indexed arrays

   索引数组

2. Associative arrays (arrays with the keys & values)

   关联数组(具有键和值的数组)

3. And, multidimensional arrays

   而且，多维数组

Syntax to create an indexed array:

创建索引数组的语法：

    array(element1, element2, element2, ...);

Syntax to create array with keys:

用键创建数组的语法：

    array(key1=>value1, key2=>value2, key3=>value3, ...);

PHP code:

PHP代码：

Here, we are creating an indexed array and printing the array with one by one element (using indexes) and also printing the complete array.

在这里，我们创建一个索引数组，并用一个一个元素(使用索引)打印该数组，并打印整个数组。

<?php
//array of numbers
$arr_num = array(10, 20, 30, 40, 50);
//array with strings
$arr_string = array("Laptop", "Mobile", "Tablet");
//array with mixed types
$arr_mixed = array("Hello", 10, "friends", 20);
//printing arrays elements
print ("Array elements: $arr_num[0], $arr_num[1],  $arr_num[2],  $arr_num[3],  $arr_num[4]\n");
print ("Array elements: $arr_string[0], $arr_string[1],  $arr_string[2]\n");
print ("Array elements: $arr_mixed[0], $arr_mixed[1],  $arr_mixed[2],   $arr_mixed[3]\n");
//printing complete arrays
print ("arr_num is...\n");
print_r ($arr_num);
print ("arr_string is...\n");
print_r ($arr_string);
print ("arr_mixed is...\n");
print_r ($arr_mixed);
?>

Output

输出量

Array elements: 10, 20,  30,  40,  50
Array elements: Laptop, Mobile,  Tablet
Array elements: Hello, 10,  friends,   20
arr_num is...
Array
(
[0] => 10
[1] => 20
[2] => 30
[3] => 40
[4] => 50
)
arr_string is...
Array
(
[0] => Laptop
[1] => Mobile
[2] => Tablet
)
arr_mixed is...
Array
(
[0] => Hello
[1] => 10
[2] => friends
[3] => 20
)

PHP Code:

PHP代码：

Here, we are creating associative (array with keys & values) and printing elements using keys and also printing the complete array.

在这里，我们将创建关联(具有键和值的数组)并使用键来打印元素，并打印整个数组。

<?php
//creating student array with keys & values
$std = array('id' => "101", 'name' => "Amit", 'course' => "B.Tech");
//printing elemenets
print ("std elements...\n");
print ("Id = " . $std['id'] . " Name = " . $std['name'] . " Course = " . $std['course']);
//printing complete array
print ("std...\n");
print_r($std);
?>

Output

输出量

std elements...
Id = 101 Name = Amit Course = B.Techstd...
Array
(
[id] => 101
[name] => Amit
[course] => B.Tech
)

翻译自: https://www.includehelp.com/php/array-function-with-example.aspx

php array函数