根据开始日期和结束日期过滤结果

Question

我正在尝试下面的代码来基于“从＆到日期”过滤值，但是当我单击“搜索”按钮时，它只是刷新页面并显示同一页面。 但不显示过滤结果。

的PHP

$reg_user='';

$post_at = "";
$post_at_to_date = "";

    $queryCondition = "";
    if(!empty($_POST["search"]["post_at"])) 
{           
    $post_at = date('Y-m-d 0:0:0',strtotime($_POST["search"]["post_at"]));
    $post_at_todate = date('Y-m-d:59:59:59');
    if(!empty($_POST["search"]["post_at_to_date"])) {
        $post_at_to_date = date('Y-m-d 59:59:59',strtotime($_POST["search"]["post_at_to_date"]));
        $post_at_todate = $post_at_to_date;
    }

$queryCondition .= "WHERE post_at >= '" . $post_at . "' AND post_at <= '" . $post_at_todate . "'";

$reg_user = new USER();
$stmt = $reg_user->runQuery("SELECT * FROM order_details ".$queryCondition);
$row = $stmt->fetch(PDO::FETCH_ASSOC);
$stmt->execute();

html

<form name="frmSearch" method="post" action="">

<input type="text" placeholder="From Date" id="post_at"  
value="<?php echo $post_at; ?>" name="search[post_at]" />       
<input type="text" placeholder="To Date" id="post_at_to_date" value="<?php echo $post_at_to_date; ?>" 
name="search[post_at_to_date]" onkeyup="doFilter()" />
<input type="submit" name="search" value="search" >

脚本

<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<script src= "http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.js"></script>
<script>
$.datepicker.setDefaults({
showOn: "button",
buttonImage: "datepicker.png",
buttonText: "Date Picker",
buttonImageOnly: true,
dateFormat: 'yy-mm-dd'  
});
$(function() {
$("#post_at").datepicker();
$("#post_at_to_date").datepicker();
});
</script>

日期的列名： created_at ，表名order_details 。 我对php完全陌生，请帮助我。

编辑

当我尝试var_dump($post_at); var_dump($post_at_to_date); var_dump($post_at); var_dump($post_at_to_date); ，结果为： string(0) "" string(0) ""

编辑2我正在尝试下面的代码，现在var_dump正在显示结果，但是值未基于选定的“从＆到日期”进行过滤

echo "<pre>";print_r($_POST);

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$reg_user='';

$post_at = "";
$post_at_to_date = "";
$queryCondition = "";
    if(!empty($_POST["post_at"])) 
    {           
        $post_at = date('Y-m-d 0:0:0',strtotime($_POST["post_at"]));
        $post_at_todate = date('Y-m-d:59:59:59');
        if(!empty($_POST["post_at_to_date"])) {
            $post_at_to_date = date('Y-m-d 59:59:59',strtotime($_POST["post_at_to_date"]));
            $post_at_todate = $post_at_to_date;
        }
        $queryCondition .= "WHERE post_at >= '" . $post_at . "' AND post_at <= '" . $post_at_todate . "'";
    }

    $sqlquery = "SELECT * FROM order_details $queryCondition";
    $result = $conn->query($sqlquery);

    if ($result->num_rows > 0) {
        echo $result->num_rows.'result found'."<br>";
        while($row = $result->fetch_assoc()) {
            echo "id: " . $row["id"]. " - date: " . $row["post_at"];
            echo "<br>";
        }
    } else {
        echo "0 results found <br>";
    }
$conn->close();

形成

<form name="frmSearch" method="post" action="">
<input type="text" placeholder="From Date" id="post_at" value="" name="post_at" />       
<input type="text" placeholder="To Date" id="post_at_to_date" value="" name="post_at_to_date" />
<input type="submit" name="search" value="search" />
</form>

脚本

jQuery.datepicker.setDefaults({
showOn: "button",
buttonImage: "datepicker.png",
buttonText: "Date Picker",
buttonImageOnly: true,
dateFormat: 'yy-mm-dd'  
});
$(function() {
$("#post_at").datepicker();
$("#post_at_to_date").datepicker();
});

结果：

Array
(
    [post_at] => 
    [post_at_to_date] => 2016-11-17
    [search] => search
)

找到24个结果

注意：未定义的索引：id in echo "id: " . $row["id"]. " - date: " . $row["post_at"]; echo "id: " . $row["id"]. " - date: " . $row["post_at"]; 并显示同一页面。

id：-日期：0000-00-00 00:00:00

Answer 1

试试CAST：

$ queryCondition。= “WHERE CAST（ post_at如DATE）> = CAST（”。$ post_at。 “作为日期）和CAST（ post_at如DATE）<= CAST（”。$ post_at_todate。 “为DATE）”

Answer 2

假设您数据库中的日期字段是date而不是datetime date ，那么这应该起作用，您当前正在使用无效的日期时间。

if( !empty( $_POST[ 'post_at' ] ) ) 
{           
    $post_at        = date( 'Y-m-d', strtotime( $_POST[ 'post_at' ] ) );
    $post_at_todate = date( 'Y-m-d' );
    if( !empty( $_POST[ 'post_at_to_date' ] ) )
    {
        $post_at_to_date = date( 'Y-m-d', strtotime( $_POST[ 'post_at_to_date' ] ) );
        $post_at_todate = $post_at_to_date;
    }
    $queryCondition .= "WHERE DATE( created_at ) >= '" . $post_at . "' AND DATE( created_at ) <= '" . $post_at_todate . "'";
}

$sqlquery = "SELECT * FROM order_details $queryCondition";

一些日期格式错误，请查看var_dump( $sqlquery ); 并确保格式正确。 然后确保结果通过。