今天第一天开始学习下数组的相关内容。
花费了30分钟看了相关的视频教学，然后自己跟着教程复述了一下视频里的代码。
创建数组：
- <?php
- $arr = array("a"=>1,"b"=>2,"c"=>3,"d"=>4);
- echo $arr[a];
- echo "<br />";
- echo $arr[b];
- echo "<br />";
- echo $arr[c];
- echo "<br />";
- echo $arr[d];
- echo "<br />";
- print_r($arr);
- echo "<br />";
- ?>
修改数组：
- <?php
- $arrc = array("a"=>1,"b"=>2,"c"=>3,"d"=>4);
- $arrc['a'] = "我是1";
- $arrc['b'] = "我是2";
- $arrc['c'] = "我是3";
- $arrc['d'] = "我是4";
- echo $arrc[a];
- echo "<br />";
- echo $arrc[b];
- echo "<br />";
- echo $arrc[c];
- echo "<br />";
- echo $arrc[d];
- ?>
几个数组函数：
- <?php
- $arrc = array("a"=>1,"b"=>2,"c"=>3,"d"=>4);
- echo count($arrc);
- echo "<br />";
- if (is_array($arrc)) {
- echo "是一个数组";
- }else {
- echo "不是一个数组";
- }
- ?>
- <?php
- $ex = "a-b-c-d";
- $arrd = explode("-",$ex);
- print_r($ex);
- echo "<br />";
- print_r($arrd);
- ?>
遍历数组：
- <?php
- $arrc = array(a,b,c,d);
- foreach ($arrc as $key => $value)
- {
- echo $value;
- }
- ?>
