育將電腦工作室 - 線上書籍

網站程式設計-PHP
==========

一、for

```
<pre class="brush:as3;">
for ( 初始值 ; 比對運算式 ; 初始值+步進值 ) {
　... some code ...
}
```

```
<pre class="brush:as3;">
#循環例子
$nav[1]="關於我們";
$nav[2]="最新消息";
$nav[3]="商品介紹";
$nav[4]="聯絡我們";
$smarty->assign("nav", $nav);

$count = count($nav);//返回陣列的數量

for($i=1;$i <= $count;$i++){
	echo "第{$i}個變數：".$nav[$i]." ";
}
die();
```

二、foreach

```
<pre class="brush:as3;">
foreach ( 陣列 as $key => $value )
　...some code...
```

```
<pre class="brush:as3;">
#循環例子
$nav[1]="關於我們";
$nav[2]="最新消息";
$nav[3]="商品介紹";
$nav[4]="聯絡我們";
$smarty->assign("nav", $nav);

foreach($nav as $k => $v){
	echo "第{$k}個變數：".$v." ";
}
die();
```

三、smarty foreach

```
<pre class="brush:as3;">

<li>
 <a class="page-scroll" href="#block_1"><{$nav.1}></a>
 </li>
 <li>
 <a class="page-scroll" href="#block_2"><{$nav.2}></a>
 </li>
 <li>
 <a class="page-scroll" href="#block_3"><{$nav.3}></a>
 </li>
 <li>
 <a class="page-scroll" href="#block_4"><{$nav.4}></a>
 </li>
```

```
<pre class="brush:as3;">

<{foreach from=$nav item=row key=k}>
 <li>
 <a class="page-scroll" href="#block_<{$k}>"><{$row}></a>
 </li>
 <{/foreach}>
```

四、while

```
<pre class="brush:as3;">
while (條件為真) {
 要執行的代碼;
}
```

```
<pre class="brush:as3;">
#while
$nav = array("關於我們", "最新消息", "商品介紹", "聯絡我們");
while ($row = each($nav)) {
	print_r($row) . " ";
}
die();
```

each()

返回當前元素的鍵名和鍵值，並將內部指針向前移動。

該元素的鍵名和鍵值會被返回帶有四個元素的數組中。兩個元素（1 和Value）包含鍵值，兩個元素（0 和Key）包含鍵名。

```
<pre class="brush:as3;">
$nav[1]="關於我們";
$nav[2]="最新消息";
$nav[3]="商品介紹";
$nav[4]="聯絡我們";
$nav[5]="qqqq";

$count = count($nav);
for($i=1;$i <= $count;$i++){
	echo $nav[$i] . " ";
}
```

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