Question

以下是我从MYSQL数据库中搜索日期范围的代码。我能够搜索日期并显示表格标题（产品说明，新建或自己和日期），但它不显示数据库中的任何结果？

有关如何编辑代码以便显示所选日期范围内结果的任何想法？

<?php
if(!isset($_POST['find']))
{
?>
<form method = "post" action = "<?php echo $_SERVER['PHP_SELF'];?>">
<table width = "450" align = "center">
    <tr>
    <td><b><i>Please enter date in the field below (i.e. 11-09-2012)</i></b></td>
</tr>
<tr>
    <td>
    From&nbsp;:&nbsp;
    <input type = "text" name = "small">
    To&nbsp;:&nbsp;
    <input type = "text" name = "large"></td>
</tr>
<tr>
    <td align = "center">
        <input type = "submit" name = "find" value = "SEARCH">
        <input type = "reset" value = "CLEAR FORM">
        </td>   
    </tr>
</table>
</form>
<?php
}
else
{
$small = trim($_POST['small']);
$large = trim($_POST['large']);

$connection = mysql_pconnect("localhost", "user_name", "password") or die("Connection failed. ".myslq_error());
 mysql_select_db("stock") or die("Unable to select db. ".mysql_error());
//Add 1 to the upper range, $large, else it won't make it inclusive
$query = "SELECT * FROM main_stock WHERE curr_timestamp BETWEEN DATE_FORMAT(curr_timestamp,'%".$small."') AND DATE_FORMAT(curr_timestamp, '%".($large+1)."') ORDER BY curr_timestamp";
$result = mysql_query($query) or die(mysql_error());

echo "<table width = '500' align = 'center'>";
echo "<tr><b>";
    echo "<td>Product Description</td>";
    echo "<td>New or Own?</td>";
    echo "<td>Date</td>";
echo "</b></tr>";
while($record = mysql_fetch_object($result))
{
    echo "<tr>";
        echo "<td>".$record->product_desc."</td>";
        echo "<td>".$record->newown."</td>";
        $year_part_of_date = explode('-', $record->curr_timestamp);
    echo "<td>".$year_part_of_date[0]."</td>";
        //if you want the full date replace the $year_part_of_date[0] with $record->date
    echo "</tr>";
}
echo "</table>";

}

?>

Answer 1

我猜你的查询无效。

假设curr_timestamp是格式为YYYY-MM-DD HH:MM:SS的MySQL日期时间字段，您需要将输入更改为此格式以便于比较。如果您可以详细说明有用的$small和$large格式。

您可能希望查询采用此格式

SELECT * FROM main_stock
WHERE curr_timestamp BETWEEN '$small_formatted' AND '$large_formatted'
ORDER BY curr_timestamp ASC

使用$small_formatted

之类的内容对$large_formatted和date('Y-m-d H:i:s', $input_timestamp)进行了适当格式化的时间

Answer 2

切换逻辑顺序。您不希望自己的流程成为else。
看起来你正在组合程序和对象样式。选一个。
您应该避免选择所有（SELECT *）。始终指定列列表。
日期格式不正确。您应该格式化输入日期以匹配数据库格式（YYYY-MM-DD）。我假设curr_timestamp是YYYY-MM-DD。
您需要停止使用mysql_函数deprecated。
使用预准备语句来阻止SQL注入。

我没有对此进行过测试，但这解决了我上面列出的问题：

<?php
if(isset($_POST['find']))
{
    $link = mysqli_connect("localhost", "user_name", "password", "stock");

    if (mysqli_connect_error()) {
    die('Connect Error (' . mysqli_connect_errno() . ') ' . mysqli_connect_error());
    }

    $stmt = mysqli_prepare($link, 'SELECT * FROM main_stock WHERE curr_timestamp ' . 
    "BETWEEN DATE_FORMAT(?, '%m-%d-%Y') " . 
    "AND DATE_FORMAT(?, '%m-%d-%Y') ORDER BY curr_timestamp");

    mysqli_bind_param($stmt, 'ss', $_POST['small'], $_POST['large']) or die(mysqli_error($dbh));

    $result = mysqli_stmt_execute($stmt) or die(mysqli_error($link));

    echo "<table width = '500' align = 'center'>";
    echo "<tr><b>";
    echo "<td>Product Description</td>";
    echo "<td>New or Own?</td>";
    echo "<td>Date</td>";
    echo "</b></tr>";

    while($record = mysqli_fetch_assoc($result)) {
    echo "<tr>";
    echo "<td>" . $record[product_desc] . "</td>";
    echo "<td>" . $record[newown] . "</td>";

        $year_part_of_date = explode('-', $record[curr_timestamp]);

    echo "<td>".$year_part_of_date[0]."</td>";

        //if you want the full date replace the $year_part_of_date[0] with $record->date
    echo "</tr>";
    }

    echo "</table>";

   mysqli_close($link);
}
else
{
?>
<form method = "post" action = "<?php echo $_SERVER['PHP_SELF'];?>">
<table width = "450" align = "center">
    <tr>
    <td><b><i>Please enter date in the field below (i.e. 11-09-2012)</i></b></td>
</tr>
<tr>
    <td>
    From&nbsp;:&nbsp;
    <input type = "text" name = "small">
    To&nbsp;:&nbsp;
    <input type = "text" name = "large"></td>
</tr>
<tr>
    <td align = "center">
        <input type = "submit" name = "find" value = "SEARCH">
        <input type = "reset" value = "CLEAR FORM">
        </td>   
    </tr>
</table>
</form>
<?php
}

?>

PHP不显示MYSQL时间戳搜索的结果

2 个答案: