我正在玩 PHPFreaks“简单 SQL 搜索”脚本。我想知道在提交查询后如何优化搜索方法。
假设我提交了一个像“音乐”这样的搜索词,搜索查询会给我数据库中包含“音乐”这个词的所有数据的结果,但是假设我想搜索“音乐”这个词,一旦结果已显示我想优化搜索并查找音乐下属于“摇滚”或“说唱”类别的所有结果。我想使用选定选项列表来执行此操作。
这是来自 PHPFreaks 的工作脚本,我将其包含在内,因此这里的用户也可以在需要时使用此脚本:
$error = array();
$results = array();
if (isset($_GET['search'])) {
$searchTerms = trim($_GET['search']);
$searchTerms = strip_tags($searchTerms); // remove any html/javascript.
if (strlen($searchTerms) < 3) {
$error[] = "Search terms must be longer than 3 characters.";
}else {
$searchTermDB = mysql_real_escape_string($searchTerms); // prevent sql injection.
}
// If there are no errors, lets get the search going.
if (count($error) < 1) {
$searchSQL = "SELECT sid, sbody, stitle, sdescription FROM simple_search WHERE ";
// grab the search types.
$types = array();
$types[] = isset($_GET['body'])?"`sbody` LIKE '%{$searchTermDB}%'":'';
$types[] = isset($_GET['title'])?"`stitle` LIKE '%{$searchTermDB}%'":'';
$types[] = isset($_GET['desc'])?"`sdescription` LIKE '%{$searchTermDB}%'":'';
$types = array_filter($types, "removeEmpty"); // removes any item that was empty (not checked)
if (count($types) < 1)
$types[] = "`sbody` LIKE '%{$searchTermDB}%'"; // use the body as a default search if none are checked
$andOr = isset($_GET['matchall'])?'AND':'OR';
$searchSQL .= implode(" {$andOr} ", $types) . " ORDER BY `stitle`"; // order by title.
$searchResult = mysql_query($searchSQL) or trigger_error("There was an error.<br/>" . mysql_error() . "<br />SQL Was: {$searchSQL}");
if (mysql_num_rows($searchResult) < 1) {
$error[] = "The search term provided {$searchTerms} yielded no results.";
}else {
$results = array(); // the result array
$i = 1;
while ($row = mysql_fetch_assoc($searchResult)) {
$results[] = "{$i}: {$row['stitle']}<br />{$row['sdescription']}<br />{$row['sbody']}<br /><br />";
$i++;
}
}
}
}
function removeEmpty($var) {
return (!empty($var));
}
?>
结果:
<?php echo (count($error) > 0)?"The following had errors:<br /><span id=\"error\">" . implode("<br />", $error) . "</span><br /><br />":""; ?>
<form method="GET" action="<?php echo $_SERVER['PHP_SELF'];?>" name="searchForm">
Search For: <input type="text" name="search" value="<?php echo isset($searchTerms)?htmlspecialchars($searchTerms):''; ?>" /><br />
Search In:<br />
Body: <input type="checkbox" name="body" value="on" <?php echo isset($_GET['body'])?"checked":''; ?> /> |
Title: <input type="checkbox" name="title" value="on" <?php echo isset($_GET['title'])?"checked":''; ?> /> |
Description: <input type="checkbox" name="desc" value="on" <?php echo isset($_GET['desc'])?"checked":''; ?> /><br />
Match All Selected Fields? <input type="checkbox" name="matchall" value="on" <?php echo isset($_GET['matchall'])?"checked":''; ?><br /><br />
<input type="submit" name="submit" value="Search!" />
</form>
<?php echo (count($results) > 0)?"Your search term: {$searchTerms} returned:<br /><br />" . implode("", $results):""; ?>
我希望有人能在这里引导我朝着正确的方向前进。我对 PHP/MySQL 有点熟悉,并且到处都在网上查看,但无法找到使用此脚本优化搜索结果的方法。谢谢。