PHP学习笔记7：语言结构语句

1. 顺序结构

2. if ...else...

3. if ...else if ...

4. if ...else if ...else ...

5. switch ...case...

6. while

7. do ... while ...

8. for

9. foreach用于遍历数组

9.1 只取值，不取下标

<?php
$students=array(
'2010'=>'令狐冲',
'2011'=>'林平之'
);
foreach($students as $v)
{
echo $key.":".$v;
echo "<br />";
}
?>

9.2 同时取下标和值

<?php
$students=array(
'2010'=>'令狐冲',
'2011'=>'林平之'
);
foreach($students as $key =>$v)
{
echo $key.":".$v;
echo "<br />";
}
?>