Question

我要做的是创建一个表单，用户从2中选择一个选项＆＃39;选择＆＃39;标签，然后select标签的值用于SQL查询（即results.php?select=option1+option2）。我已经设法使其在查询中使用其中一个值，但是我无法获取它以便在查询中使用这两个值。

到目前为止，这是我的代码：

$input = $_GET['input']; //this is for the text input - ignore
$topic = $_GET['topic']; // the first select box value which works well
$location = $_GET['location']; //the second select box value which isnt being inserted into the query
$combined = $input . $topic . $location;
$terms = explode(" ", $combined);
$query = "SELECT * FROM search WHERE ";

foreach ($terms as $each){
    $i++;
    if ($i == 1)
        $query .= "keywords LIKE '%$each%' ";
    else
        $query .= "OR keywords LIKE '%$each%' ";
}

Answer 1

为什么要合并这些术语然后再将它们分开？：/。没有必要。您还使用＆＃34;分隔字符串。＆＃34;但如果文本之间没有间距，则数组将两个值都作为一个

$input = $_GET['input']; //this is for the text input - ignore
$topic = $_GET['topic']; // the first select box value which works well
$location = $_GET['location'];
$terms[]=$input;
$terms[]=$topic;
$terms[]=$location;

$query = "SELECT * FROM search WHERE ";

foreach ($terms as $each){
    if ($each != $terms[count($terms)-1]) //If $each is not the last item in the array
        $query .= "keywords LIKE '%$each%' ";
    else
        $query .= " OR keywords LIKE '%$each%' ";
}

如何使用多个HTML选择标记进行SQL查询

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