Question

我有一个多重复选框搜索查询，用于从数据库中提取数据。以下是代码：

HTML code：

<form action="search.php" method="post">
<input type="checkbox" name="cloth_color[]" value="Red" /> Red <br>
<input type="checkbox" name="cloth_color[]" value="Yellow" /> Yellow <br>
<input type="checkbox" name="cloth_color[]" value="Blue" /> Blue <br>
<input type="checkbox" name="cloth_color[]" value="Green" /> Green <br>
<input type="checkbox" name="cloth_color[]" value="Magenta" /> Magenta <br>
<input type="checkbox" name="cloth_color[]" value="Black" /> Black <br>
<input type="checkbox" name="cloth_color[]" value="White" /> White <br>
<input type="submit" value="SEARCH">
</form>

PHP代码：

<?php
$checkbox1 = $_POST['cloth_color'];  
$chk="";  
foreach($checkbox1 as $chk1)  
   {  
      $chk .= $chk1;
   }

if($_POST['cloth_color'] != "") {
$query = "SELECT * FROM clothings WHERE colorofcloth = '$chk'";
$result = mysql_query($query);
while($row = mysql_fetch_array($result)) {
$colorofcloth = $row['colorofcloth'];

    echo 'The cloth with ' . $colorofcloth . ' color';
    echo '<br>';

}
}
?>

现在如果我从搜索选择框中选择一个选项，我就会得到查询。但如果我选择两种或更多颜色，我就不会得到查询。非常感谢帮助。

P.S。我在Mysql查询中确实有多个连接，但这是我被困的地方，因此在这里提出尽可能清晰的问题。此外，我打算在启动此代码之前将mysql转换为mysqli。谢谢:)）

Answer 1

<?php
$checkbox1 = $_POST['cloth_color'];  
$chk="";  
foreach($checkbox1 as $chk1)  
   {  
      $chk .= $chk1 . ",";
   }

if($_POST['cloth_color'] != "") {
$query = "SELECT * FROM clothings WHERE colorofcloth IN($chk)";
$result = mysql_query($query);
while($row = mysql_fetch_array($result)) {
$colorofcloth = $row['colorofcloth'];

    echo 'The cloth with ' . $colorofcloth . ' color';
    echo '<br>';

}
?>

你可以试试这个代码，它将使用MySQL的IN（），你可以传递多个分开的值。

希望这有帮助

Answer 2

您可能想要使用的是Mysql IN CLause。

对于此示例，我假设您对de IN子句中的元素使用了正确的语法。

如果选择红色和蓝色，正确的语法将是您需要用逗号分隔的所有值。

$chk = 'red, blue'

使用＆＃39; IN条款＆＃39;这个查询

$query = "SELECT * FROM clothings WHERE colorofcloth = '$chk'";

应该转变为此。

$query = "SELECT * FROM clothings WHERE colorofcloth IN ('$chk')";

我对PHP知之甚少，但对于数据库，它应该可以工作。

让我知道它是否有效。

Answer 3

好的，这就是我做的。首先得到了@Dhaval和@Carlos的大力帮助，因为我不熟悉Mysql中的IN函数。

<?php
$checkbox1 = $_POST['cloth_color'];  
$chk="";  
foreach($checkbox1 as $chk1)  
   {  
      $chk .= "'" . $chk1."', ";
      //This is important as it is not the number it is a word so it should have a single quote if in query we are using double quote or vice versa.
   }
$check_e = rtrim($chk,", ");
//Although i havn't checked in real time if mysql query will take last comma or not but it is a good practice to remove the last comma by rtrim.

if($_POST['cloth_color'] != "") {
$query = "SELECT * FROM clothings WHERE colorofcloth IN($check_e)";
$result = mysql_query($query);
while($row = mysql_fetch_array($result)) {
$colorofcloth = $row['colorofcloth'];

    echo 'The cloth with ' . $colorofcloth . ' color';
    echo '<br>';

}
?>

多个复选框搜索查询从php

3 个答案: