<?php
// 数组的两种形式
// 1. $arr = (1,2,3) 默认key是从0开始的整数
// 2.$arr = ("a"=>"1","b"=>"2","c"=>"3");
$arr = array(1, 2, 3);
echo $arr[0];
echo '<br>';
print_r($arr);
$arr1 = array('name' => 'zs', 'age' => '18');
echo '<br>';
echo $arr1['name'];
echo '<br>';
print_r($arr1);
echo '<br>';
var_dump($arr1);
echo '<br>';
// 二维数组
$arr2 = array();
$arr2[0] = array(1, 2, 3);
$arr2[1] = array(4, 5, 6);
$arr2[2] = array(7, 8, 9);
print_r($arr2);
// Array (
// [0] => Array ( [0] => 1 [1] => 2 [2] => 3 )
// [1] => Array ( [0] => 4 [1] => 5 [2] => 6 )
// [2] => Array ( [0] => 7 [1] => 8 [2] => 9 )
// )
echo '<br>';
$arr3 = array();
$arr3['apple'] = array('color' => 'red', 'shape' => 'round');
$arr3['orange'] = array('color' => 'orange', 'shape' => 'round');
$arr3['banana'] = array('color' => 'yellow', 'shape' => 'long');
print_r($arr3);
echo '<br>';
echo $arr3['apple']['color'];
// Array (
// [apple] => Array ( [color] => red [shape] => round )
// [orange] => Array ( [color] => orange [shape] => round )
// [banana] => Array ( [color] => yellow [shape] => long )
// )
?>
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