[英]PHP search using == and not case sensitive
我在 PHP 中有一个代码,我想使用 == 运算符来搜索精确的术语,并且搜索不区分大小写。 当我将 LIKE 更改为 == 时,第一件事不起作用。
<?php
$con = mysql_connect('********','********','********');
mysql_select_db("********",$con);
function search_results($keywords){
$returned_results = array();
$where ="";
$keywords = preg_split('/[\s]+/',$keywords);
$total_keywords = count($keywords);
foreach($keywords as $key=>$keyword){
$where .= "`keywords` LIKE '%$keyword%'";
if($key != ($total_keywords -1)){
$where .=" AND ";
}
}
$results = "SELECT name, image_url, game_url, alt FROM search_games WHERE $where";
$results_num = ($results =mysql_query($results))? mysql_num_rows($results):0;
if($results_num === 0){
return false;
}
else{
while ($results_row = mysql_fetch_assoc($results)) {
$returned_results[] = array(
'name' => $results_row['name'],
'image_url' => $results_row['image_url'],
'game_url' => $results_row['game_url'],
'alt' => $results_row['alt']
);
}
return $returned_results;
}
}
?>
使用 MySql LOWER函数执行不区分大小写的搜索:
...
foreach ($keywords as $key => $keyword) {
$keyword = strtolower($keyword);
$where .= " LOWER(`keywords`) LIKE '%$keyword%'";
if ($key != ($total_keywords -1)) {
$where .= " AND ";
}
}
您可以使用以下代码替换 foreach:
foreach($keywords as $key=>$keyword){
$keyword = strtoupper($keyword);
$where .= "upper(`keywords`) = '$keyword'";
if($key != ($total_keywords -1)){
$where .=" AND ";
}
}
上面的代码将$keyword
字符串设为大写,然后在 sql 查询中将它与upper(keywords)
进行比较,因此它们在比较时都是大写的。
资料来源:
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.