php foreach循环是用来遍历数组
语法：
//语法一
foreach(数组 as 值){
}
//语法二
foreach(数组 as 键=>值){
}
代码运行：
- <?php
- $stu=['tom','berry','ketty'];
- foreach($stu as $v){
- echo $v,'<br>';
- }
- /**
- tom
- berry
- ketty
- */
- echo '<hr>';
- -----------------------------------------------------------
- foreach($stu as $k=>$v){
- echo "{$k}:{$v}<br>";
- }
- /**
- 0:tom
- 1:berry
- 2:ketty
- */
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