ecshop模板中foreach的使用方法

1:foreach使用規則，他有以下幾個參數 from ,item name iteration index

2:如何使用foreach循環

如果php要傳遞一個數組（如：$array）給ecshop的smarty模板．那麼我們將通過from=$array 來接受，寫法是{foreach from = $array item = item}

     3:
     ecshop中smarty的下標如何表示，請看下面的例子：
     {foreach from = $array item = item name=name}
     {$smarty.foreach.name.iteration}
     {/foreach}

     這裏的iteration就是從1開始的下標，
     如果要從０開始的下標，應該使用{$smarty.foreach.name.index}

4:如何判斷是否是foreach循環的開始和結束，最後一個元素．

{if $smarty.foreach.last}表示循環的最後一個元素．{if $smarty.freach.first}表示循環的開始．

5:如何使用雙重循環．

舉例如下：

{foreach from = $test item =item}

{foreach from=$item.children item=child}
{$child.name}
{/foreach}
{/foreach}

share_info.allow_share = 1

ecshop 裏邊{foreach from=$searchkeywords item=val}是什麼意思啊要詳細的解釋

smarty的語法    相當於  foreach ($searchkeywords as $val) {}

php中foreach()的用法

foreach()有兩種用法：

1： foreach(array_name as $value)
    {
    statement;
    }

這裏的array_name是你要遍歷的數組名，每次循環中，array_name數組的當前元素的值被賦給$value,並且數組內部的下標向下移一步，也就是下次循環回得到下一個元素。

2：foreach(array_name as $key => $value)
    {
        statement;
     }

這裏跟第一種方法的區別就是多了個$key,也就是除了把當前元素的值賦給$value外，當前元素的鍵值也會在每次循環中被賦給變量$key。鍵值可以是下標值，也可以是字符串。比如book[0]=1中的“0”，book[id]="001"中的“id”.

示範用法的更多例子：

<?php
/*-------------------------------------------------------------------------*/
/* foreach example 1: value only */
echo "foreach example 1: value only ".' ';
$a = array(1, 2, 3, 17);
foreach ($a as $v) {
 echo "Current value of "$a: $v".' ';
}
/*-------------------------------------------------------------------------*/
/* foreach example 2: value (with key printed for illustration) */
echo ' '.' '."foreach example 2: value (with key printed for illustration) ".' ';
$a = array(1, 2, 3, 17);
$i = 0; /* for illustrative purposes only */
foreach ($a as $v) {
 echo ""$a[$i] => $v".' ';
 $i++;
}
/*-------------------------------------------------------------------------*/
/* foreach example 3: key and value */
echo ' '.' '."foreach example 3: key and value ".' ';
$a = array(
 "one" => 1,
 "two" => 2,
 "three" => 3,
 "seventeen" => 17
);
foreach ($a as $k => $v) {
 echo ""$a[$k] => $v".' ';
}
/*-------------------------------------------------------------------------*/
/* foreach example 4: multi-dimensional arrays */
echo ' '.' '."foreach example 4: multi-dimensional arrays ".' ';
$a = array();
$a[0][0] = "a";
$a[0][1] = "b";
$a[1][0] = "y";
$a[1][1] = "z";
foreach ($a as $v1) {
 foreach ($v1 as $v2) {
 echo "$v2"n";
 }
}
/*-------------------------------------------------------------------------*/
/* foreach example 5: dynamic arrays */
echo ' '.' '."foreach example 5: dynamic arrays ".' ';
foreach (array(1, 2, 3, 4, 5) as $v) {
 echo "$v"n";
}
?>

結果如下:

foreach example 1: value only
Current value of $a: 1
Current value of $a: 2
Current value of $a: 3
Current value of $a: 17
foreach example 2: value (with key printed for illustration)
$a[0] => 1
$a[1] => 2
$a[2] => 3
$a[3] => 17
foreach example 3: key and value
$a[one] => 1
$a[two] => 2
$a[three] => 3
$a[seventeen] => 17
foreach example 4: multi-dimensional arrays
a b y z
foreach example 5: dynamic arrays
1 2 3 4 5