php 数组的创建、调用和更新实现代码

复制代码 代码如下:

  <?php

  $array = array("key1" => "Simon", 2 => "Elaine"); //数组的创建

  echo $array["key1"]; //输出Simon

  echo $array[2]; //输出Elaine

  ?>

  

复制代码 代码如下:

  <?php

  $array = array("key1" => array(0 => 1, 1 => 10, 2 => 100),

  "key2" => array(0 => 5, 1 => 25, 2 => 125));

  echo $array["key1"][0]; //输出1

  echo $array["key1"][1]; //输出10

  echo $array["key1"][2]; //输出100

  echo $array["key2"][0]; //输出5

  echo $array["key2"][1]; //输出25

  echo $array["key2"][2]; //输出125

  ?>

  

复制代码 代码如下:

  <?php

  $array = array("key1" => array(0 => 1, 1 => 10, 2 => 100), //定义数组

  "key2" => array(0 => 5, 1 => 25, 2 => 125));

  print_r($array); //输出数组

  ?>

  

复制代码 代码如下:

  <?php

  $array = array("a", "b","c"); //定义数组

  print_r($array); //输出数组

  ?>

  

复制代码 代码如下:

  <?php

  $array = array("a", "b","c"); //定义数组

  $array[0] = "Simon"; //修改数组元素

  print_r($array); //输出数组

  ?>