[PHP]如何使用foreach在sql查询中添加AND或OR语句？

Question

大家好，我正在尝试在我的 PHP 中执行多条件搜索，所以我想使用 foreach 根据用户选择的数量自动添加 AND 语句。以下是我的代码：

$sub = trim(ucfirst($_POST['sub']));
$any = trim(ucfirst($_POST['key']));
$count = 0;
$query = "SELECT P.PTY_ID, P.PTY_UNITNUM, P.PTY_STREET, P.PTY_POSTCODE, P.PTY_SUBURB,P.PTY_CITY, T.P_TYPE_NAME, 
                  L.SALE_PRICE, L.AVAILABILITY, R.PTY_ID,F.FEAT_ID, R.FEAT_ID,F.FEAT_NAME   
          FROM PROPERTY_TYPE T, PROPERTY P, LISTINGS L, PROPERTY_FEATURE R, FEATURE F 
          WHERE P.P_TYPE_ID = T.P_TYPE_ID(+) 
          AND P.PTY_ID = L.PTY_ID(+)
          AND R.FEAT_ID= F.FEAT_ID
          AND R.PTY_ID= P.PTY_ID
          AND REGEXP_LIKE (P.PTY_SUBURB,'$sub')
          AND REGEXP_LIKE (P.PTY_STREET||P.PTY_POSTCODE,'$any')
          OR(
                ".foreach ($_POST["check"] as $feat_id) {
                    if ($count != 0)
                        echo "AND";
                    echo "FEAT_ID = ' . $feat_id . '";
                    $count++;
                }.")";

$stmt = oci_parse($conn, $query);
oci_execute($stmt);

因此，就我而言，我想按郊区、一些关键字（如邮政编码和街道名称）以及特征来搜索房产。为了响应用户对多个功能的选择，我尝试使用 foreach 循环打印“AND FEAT_ID = (posted id)”，但在“OR”部分直到查询结束时出现语法错误, 说一些表达式是预期的。 我目前在 PHP 学习方面还很陌生。有人可以为我指出正确的格式吗？干杯（：

Answer 1

我不确定 100% 你的问题是什么，但我会稍微清理一下。同样，这是我的编码风格，所以其他人可能仍然认为这可以改进。

$sub = trim(ucfirst($_POST['sub']));
$any = trim(ucfirst($_POST['key']));
$count = 0;
$or = "";

if (isset($_POST["check"]))
{
    $featArray = [];
    foreach ($_POST["check"] as $feat_id)
    {
        array_push($featArray, "FEAT_ID = " .$feat_id);
    }

    $or = implode(' AND ', $featArray);
}

$query = "SELECT P.PTY_ID, P.PTY_UNITNUM, P.PTY_STREET, P.PTY_POSTCODE, P.PTY_SUBURB,P.PTY_CITY, T.P_TYPE_NAME, 
                  L.SALE_PRICE, L.AVAILABILITY, R.PTY_ID,F.FEAT_ID, R.FEAT_ID,F.FEAT_NAME   
          FROM PROPERTY_TYPE T, PROPERTY P, LISTINGS L, PROPERTY_FEATURE R, FEATURE F 
          WHERE P.P_TYPE_ID = T.P_TYPE_ID(+) 
          AND P.PTY_ID = L.PTY_ID(+)
          AND R.FEAT_ID= F.FEAT_ID
          AND R.PTY_ID= P.PTY_ID
          AND REGEXP_LIKE (P.PTY_SUBURB, '$sub')
          AND REGEXP_LIKE (P.PTY_STREET||P.PTY_POSTCODE, '$any')";

if ($or != null)
    $query .= " OR (" . $or . ")";

$stmt = oci_parse($conn, $query);
oci_execute($stmt);

我还会检查您的 $_POST['sub'] 和 $_POST['key'] 或设置。

Answer 2

@李史蒂文斯 谢谢你的主意！ .= 你提到的使用完美地解决了我的问题。 为了适合我的使用，我将代码修改为：

<?php
    $sub = trim(ucfirst($_POST['sub']));
    $any = trim(ucfirst($_POST['key']));
    $count = 0;
    $and = "";  
/* All the same above */

    if (isset($_POST["check"]))
    {
        $featArray = [];
        foreach ($_POST["check"] as $feat_id)
        {
            array_push($featArray, "AND F.FEAT_ID = " .$feat_id);
            /* Add an "AND" here coz the original codes can't print */
            /* the "AND" for some reasons */
        }

        $and = implode(" ", $featArray);
        /* Remove "AND" here */
    }
    $query = "SELECT P.PTY_ID, P.PTY_UNITNUM, P.PTY_STREET, P.PTY_POSTCODE, P.PTY_SUBURB,P.PTY_CITY, T.P_TYPE_NAME, 
                      L.SALE_PRICE, L.AVAILABILITY, R.PTY_ID,F.FEAT_ID, R.FEAT_ID,F.FEAT_NAME   
              FROM PROPERTY_TYPE T, PROPERTY P, LISTINGS L, PROPERTY_FEATURE R, FEATURE F 
              WHERE P.P_TYPE_ID = T.P_TYPE_ID(+) 
              AND P.PTY_ID = L.PTY_ID(+)
              AND R.FEAT_ID= F.FEAT_ID
              AND R.PTY_ID= P.PTY_ID
              AND REGEXP_LIKE (P.PTY_SUBURB,'$sub')
              AND REGEXP_LIKE (P.PTY_STREET||P.PTY_POSTCODE,'$any')";


    if (!empty($and))
        $query.="$and";

    $stmt = oci_parse($conn, $query);
    oci_execute($stmt);
?>