php - 使用具有多个字段的表单查询数据库

标签 php mysql

我有一个带有单选按钮的表单，我想用它从 MySQL 数据库中的表中获取数据，这是表单:

<div class="filter-container">
<p class="filter-title">BTU's</p><div class="filter">
<input type="radio" name="choice-0" id="choice-0" tabindex="0" value="" checked="checked" />
<label for="none">None</label></div><div class="filter">
    <input type="radio" name="choice-0" id="choice-0" tabindex="0" value="100000" />
    <label for="choice-0">100000<span>(10)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-0" id="choice-0" tabindex="0" value="120000" />
    <label for="choice-0">120000<span>(7)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-0" id="choice-0" tabindex="0" value="40000" />
    <label for="choice-0">40000<span>(5)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-0" id="choice-0" tabindex="0" value="60000" />
    <label for="choice-0">60000<span>(11)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-0" id="choice-0" tabindex="0" value="80000" />
    <label for="choice-0">80000<span>(18)</span></label>
    </div></div><div class="filter-container">
<p class="filter-title">Efficiency (AFUE)</p><div class="filter">
<input type="radio" name="choice-1" id="choice-1" tabindex="0" value="" checked="checked" />
<label for="none">None</label></div><div class="filter">
    <input type="radio" name="choice-1" id="choice-1" tabindex="1" value="80%" />
    <label for="choice-1">80%<span>(21)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-1" id="choice-1" tabindex="1" value="92%" />
    <label for="choice-1">92%<span>(8)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-1" id="choice-1" tabindex="1" value="96%" />
    <label for="choice-1">96%<span>(17)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-1" id="choice-1" tabindex="1" value="97%" />
    <label for="choice-1">97%<span>(5)</span></label>
    </div></div><div class="filter-container">
<p class="filter-title">Width</p><div class="filter">
<input type="radio" name="choice-2" id="choice-2" tabindex="0" value="" checked="checked" />
<label for="none">None</label></div><div class="filter">
    <input type="radio" name="choice-2" id="choice-2" tabindex="2" value="14" />
    <label for="choice-2">14<span>(4)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-2" id="choice-2" tabindex="2" value="17.5" />
    <label for="choice-2">17.5<span>(20)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-2" id="choice-2" tabindex="2" value="21" />
    <label for="choice-2">21<span>(19)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-2" id="choice-2" tabindex="2" value="221" />
    <label for="choice-2">221<span>(1)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-2" id="choice-2" tabindex="2" value="24.5" />
    <label for="choice-2">24.5<span>(7)</span></label>
    </div></div><div class="filter-container">
<p class="filter-title">Blower Type</p><div class="filter">
<input type="radio" name="choice-3" id="choice-3" tabindex="0" value="" checked="checked" />
<label for="none">None</label></div><div class="filter">
    <input type="radio" name="choice-3" id="choice-3" tabindex="3" value="Multi-Speed" />
    <label for="choice-3">Multi-Speed<span>(23)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-3" id="choice-3" tabindex="3" value="Multi-Speed ECM" />
    <label for="choice-3">Multi-Speed ECM<span>(7)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-3" id="choice-3" tabindex="3" value="Single Speed" />
    <label for="choice-3">Single Speed<span>(7)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-3" id="choice-3" tabindex="3" value="Variable Speed" />
    <label for="choice-3">Variable Speed<span>(3)</span></label>
    </div><div class="filter">
    <input type="radio" name="choice-3" id="choice-3" tabindex="3" value="Variable Speed ECM" />
    <label for="choice-3">Variable Speed ECM<span>(11)</span></label>
    </div></div>

我需要将任意值组合与类别常量相匹配。这就是我用来处理表单的内容:

<?php
if('POST' == htmlspecialchars($_SERVER['REQUEST_METHOD']) ){

    $cat_id = 4001;

    if ( isset($_POST['choice-0']) ) {
        $choice0 = $_POST['choice-0'];
    }

    if ( isset($_POST['choice-1']) ) {
        $choice1 = $_POST['choice-1'];
    }

    if ( isset($_POST['choice-2']) ) {
        $choice2 = $_POST['choice-2'];
    }

    if ( isset($_POST['choice-3']) ) {
        $choice3 = $_POST['choice-3'];
    }

    if ( isset($_POST['choice-4']) ) {
        $choice4 = $_POST['choice-4'];
    }

    if ( isset($_POST['choice-5']) ) {
        $choice5 = $_POST['choice-5'];
    }

    if ( isset($_POST['choice-6']) ) {
        $choice6 = $_POST['choice-6'];
    }

    $query = $connect->query( "SELECT * FROM PRODUCTS WHERE PR_ProductCategory='$cat_id' AND (PR_UDSearch0='$choice0' OR PR_UDSearch1='$choice1' OR PR_UDSearch2='$choice2' OR PR_UDSearch3='$choice3' OR PR_UDSearch4='$choice4' OR PR_UDSearch5='$choice5' OR PR_UDSearch6='$choice6')" );

    var_dump($query);

}

?>

我做了各种 SELECT 语句来获取数据，但没有成功(包括上面的那个)。我不想要火柴的组合。为了我的需要，我需要一个或另一个的匹配，而不是两者。换句话说，我需要将 cat_id 用作常量，然后匹配我从单选按钮获得的任何其他组合(选择 1，或选择 1 和 2，或选择 2 和 4，或选择 3 等)。我一定是在查询或其他方面设置错误。我已经用谷歌搜索了好几天，还没有弄明白。谢谢!!

更新:我现在尝试根据选择创建 SELECT 语句:

$cat_id = 4001;
                    $query_str = "SELECT * FROM PRODUCTS WHERE PR_ProductCategory='$cat_id' AND (";

                    if ( isset($_POST['choice-0'] ) ) {
                        $choice0 = $_POST['choice-0'];
                        $query_str .= "PR_UDSearch0='$choice0'";
                    }

                    if ( isset($_POST['choice-1'] ) ) {
                        $choice1 = $_POST['choice-1'];
                        $query_str .= "OR PR_UDSearch0='$choice1'";
                    }

                    if ( isset($_POST['choice-2'] ) ) {
                        $choice2 = $_POST['choice-2'];
                        $query_str .= "OR PR_UDSearch0='$choice2'";
                    }

                    if ( isset($_POST['choice-3'] ) ) {
                        $choice3 = $_POST['choice-3'];
                        $query_str .= "OR PR_UDSearch0='$choice3'";
                    }

                    if ( isset($_POST['choice-4'] ) ) {
                        $choice4 = $_POST['choice-4'];
                        $query_str .= "OR PR_UDSearch0='$choice4'";
                    }

                    if ( isset($_POST['choice-5'] ) ) {
                        $choice5 = $_POST['choice-5'];
                        $query_str .= "OR PR_UDSearch0='$choice5'";
                    }

                    if ( isset($_POST['choice-6'] ) ) {
                        $choice6 = $_POST['choice-6'];
                        $query_str .= "OR PR_UDSearch0='$choice6'";
                    }

                    $query_str .= ")";
                    $query = $connect->query( $query_str );

我认为它更接近，但如果未选择某些内容，我会得到 NULL。

最后更新:我在一些帮助下弄明白了。我根据选择构建了 SELECT 语句，并使用它来获取结果。这是我的完整解决方案:

    if('POST' == htmlspecialchars($_SERVER['REQUEST_METHOD']) ){

$cat_id = 4001;
$query_str = "SELECT * FROM PRODUCTS WHERE PR_ProductCategory='$cat_id' ";

if ( isset($_POST['choice-0']) ) {
    $choice0 = $_POST['choice-0'];

    if ( $choice0 ) {
        $query_str .= "AND PR_UDSearch0='$choice0'";
    }
}

if ( isset($_POST['choice-1']) ) {
    $choice1 = $_POST['choice-1'];

    if ( $choice1 ) {
        $query_str .= " AND PR_UDSearch1='$choice1'";
    }
}

if ( isset($_POST['choice-2']) ) {
    $choice2 = $_POST['choice-2'];

    if ( $choice2 ) {
        $query_str .= " AND PR_UDSearch2='$choice2'";
    }
}

if ( isset($_POST['choice-3']) ) {
    $choice3 = $_POST['choice-3'];

    if ( $choice3 ) {
        $query_str .= " AND PR_UDSearch3='$choice3'";
    }
}

if ( isset($_POST['choice-4']) ) {
    $choice4 = $_POST['choice-4'];

    if ( $choice4 ) {
        $query_str .= " AND PR_UDSearch4='$choice4'";
    }
}

if ( isset($_POST['choice-5']) ) {
    $choice5 = $_POST['choice-5'];

    if ( $choice5 ) {
        $query_str .= " AND PR_UDSearch5='$choice5'";
    }
}

if ( isset($_POST['choice-6']) ) {
    $choice6 = $_POST['choice-6'];

    if ( $choice6 ) {
        $query_str .= " AND PR_UDSearch6='$choice6'";
    }
}

$query_str .= "";
$query = $connect->query( $query_str );

while ($row = mysqli_fetch_array($query)) {

$sku    = $row[PR_SKU];
$img    = $row[PR_URLofThumb];
$desc   = $row[PR_Description];
$price  = $row[PR_UnitPrice];

echo '<div class="box">
<div class="box-image">
<a href="/cgi-bin/commerce.cgi?preadd=action&key=' . $sku . '"><img src="' . $img . '" /></a>
</div>
<p>Price:' .  $price . '</p>
<a href="/cgi-bin/commerce.cgi?preadd=action&key=' . $sku . '">' . $desc . '</a>
</div>';

 }
}

最佳答案

看来您可能必须根据选择构建查询语句。此代码将执行此操作。

$cat_id = 4001;
$choices = [];

if(!empty($_POST['choice-0']))
{
  $choices[] = "PR_UDSearch0='{$_POST['choice-0']}'";
}
if(!empty($_POST['choice-1']))
{
  $choices[] = "PR_UDSearch1='{$_POST['choice-1']}'";
}
if(!empty($_POST['choice-2']))
{
  $choices[] = "PR_UDSearch2='{$_POST['choice-2']}'";
}
if(!empty($_POST['choice-3']))
{
  $choices[] = "PR_UDSearch3='{$_POST['choice-3']}'";
}
if(!empty($_POST['choice-4']))
{
  $choices[] = "PR_UDSearch4='{$_POST['choice-4']}'";
}
if(!empty($_POST['choice-5']))
{
  $choices[] = "PR_UDSearch5='{$_POST['choice-5']}'";
}
if(!empty($_POST['choice-6']))
{
  $choices[] = "PR_UDSearch6='{$_POST['choice-5']}'";
}

$additional_where = "";
$count = count($choices);

if($count > 0)
{
  if($count > 1)
  {
    $i = 0;
    $additional_where = " AND (";
    foreach($choices as $choice)
    {
      $or = ++$i < $count ? " OR " : ""; //adding OR where needed
      $additional_where .= $choice.$or;
    }
    $additional_where .= ")";
  }
  else
  {
    $additional_where = " AND $choices[0]";
  }
}
$sql = "SELECT * FROM PRODUCTS WHERE PR_ProductCategory='$cat_id'".$additional_where;

var_dump($sql);
//$query = $connect->query($sql);
//var_dump($query);

通过使用 !empty($_POST[... 您确认 $_POST 项已设置，它不是 NULL，也不是空字符串一次。

关于php - 使用具有多个字段的表单查询数据库，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38662441/

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