ecshop搜索模块代码介绍

<div class="serach-box">
<form id="searchForm" name="searchForm" method="get" action="search.php" onSubmit="return checkSearchForm()" class="f_r">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="135"><input name="keywords" type="text" id="keyword" value="{$search_keywords|escape}" class="B_input" /></td>
<td><input name="imageField" type="submit" value="搜索" class="go" style="cursor:pointer;" /></td>
</tr>
</table>
</form>
</div>

<span style="font-size:18px;">value="{$search_keywords|escape}"</span>

/* 初始化搜索条件 */
$keywords = '';
$tag_where = '';
if (!empty($_REQUEST['keywords']))
{
$arr = array();
if (stristr($_REQUEST['keywords'], ' AND ') !== false)
{
/* 检查关键字中是否有AND，如果存在就是并 */
$arr = explode('AND', $_REQUEST['keywords']);
$operator = " AND ";
}
elseif (stristr($_REQUEST['keywords'], ' OR ') !== false)
{
/* 检查关键字中是否有OR，如果存在就是或 */
$arr = explode('OR', $_REQUEST['keywords']);
$operator = " OR ";
}
elseif (stristr($_REQUEST['keywords'], ' + ') !== false)
{
/* 检查关键字中是否有加号，如果存在就是或 */
$arr = explode('+', $_REQUEST['keywords']);
$operator = " OR ";
}
else
{
/* 检查关键字中是否有空格，如果存在就是并 */
$arr = explode(' ', $_REQUEST['keywords']);
$operator = " AND ";
}
$keywords = 'AND (';
$goods_ids = array();
foreach ($arr AS $key => $val)
{
if ($key > 0 && $key < count($arr) && count($arr) > 1)
{
$keywords .= $operator;
}
$val = mysql_like_quote(trim($val));
$sc_dsad = $_REQUEST['sc_ds'] ? " OR goods_desc LIKE '%$val%'" : '';
$keywords .= "(goods_name LIKE '%$val%' OR goods_sn LIKE '%$val%' OR keywords LIKE '%$val%' $sc_dsad)";
$sql = 'SELECT DISTINCT goods_id FROM ' . $ecs->table('tag') . " WHERE tag_words LIKE '%$val%' ";
$res = $db->query($sql);
while ($row = $db->FetchRow($res))
{
$goods_ids[] = $row['goods_id'];
}
$db->autoReplace($ecs->table('keywords'), array('date' => local_date('Y-m-d'),
'searchengine' => 'ecshop', 'keyword' => addslashes(str_replace('%', '', $val)), 'count' => 1), array('count' => 1));
}
$keywords .= ')';
$goods_ids = array_unique($goods_ids);
$tag_where = implode(',', $goods_ids);
if (!empty($tag_where))
{
$tag_where = 'OR g.goods_id ' . db_create_in($tag_where);
}
}

<span style="font-size:18px;">$_REQUEST['keywords']</span>

<span style="font-size:18px;"><!-- {if $action eq "form"} --></span>