1. PHP two-dimensional array
In the primary tutorial, the arrays we learn are all one-dimensional arrays
In this chapter we introduce Multi-dimensional arrays, starting with two dimensions
The values in one array can be another array, and the values in another array can also be an array. In this way, we can create a two-dimensional g array:
Create a two-dimensional array as follows:
Example: The code is as follows
<?php
// 二维数组:
$cars = array
(
array("Volvo",100,96),
array("BMW",60,59),
array("Toyota",110,100)
);
?>II , PHP multidimensional array
A multidimensional array is an array containing one or more arrays.
In a multi-dimensional array, each element in the main array can also be an array, and each element in the sub-array can also be an array.
Example: We created a multi-dimensional array that automatically assigns ID keys. The code is as follows
<?php
$sites = array
(
"php"=>array
(
"php中文网",
"http://www.php.cn"
),
"google"=>array
(
"baidu 搜索",
"http://www.baidu.com"
),
"taobao"=>array
(
"淘宝",
"http://www.taobao.com"
)
);
print("<pre>"); // 格式化输出数组
print_r($sites); //将数组打印出来
print("</pre>");
?>The output result is as shown on the right
Try to output a single element on the page ：
The code is as follows
<?php
$sites = array
(
"php"=>array
(
"php中文网",
"http://www.php.cn"
),
"baidu"=>array
(
"baidu 搜索",
"http://www.baidu.com"
),
"taobao"=>array
(
"淘宝",
"http://www.taobao.com"
)
);
echo '欢迎访问'.$sites['php'][0].'我们的网址是'.$sites['php'][1]
?>
The output result is shown on the right
Note: When creating a multi-dimensional array, pay attention to the commas separating the arrays. The outer array ")" is followed by a semicolon.
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