想要根据日期改变颜色

Question

我想根据日期改变颜色。比方说，如果小于今天的日期，则必须显示为红色，否则必须显示为绿色color.I 将提供屏幕截图。

如截图所示，2022-05-25 必须为绿色，2021-10-16 必须为红色。另外，我想按顺序显示 DD-MM-YY。我可以知道我该怎么做吗？

{
            $type = $equipArray[$x];
            
            $sql= "SELECT * FROM map_db_oee.`tbl_actual_correlation` WHERE `waferid` LIKE 'NSX1234%' AND prober='".$type."' ORDER BY dt_corr DESC LIMIT 1";
            //echo $sql.'<br>';
            $result = mysqli_query($conn, $sql);
            if (mysqli_num_rows($result) > 0) {
                $row = mysqli_fetch_array($result);
                if ($date < $now ){
                    $date = "<br><font size=\"2px\" color=\"red\">".$row["dt_corr"]."</font>";}
                else {
                    $date = "<br><font size=\"2px\" color=\"green\">".$row["dt_corr"]."</font>";
                }
                
                //echo $date.'<br>';
            }
            else{
                $date = "";
            }

Answer 1

$type = $equipArray[$x];
        
$sql= "SELECT * FROM map_db_oee.`tbl_actual_correlation` WHERE `waferid` LIKE 'NSX1234%' AND prober='".$type."' ORDER BY dt_corr DESC LIMIT 1";

$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {

    $row = mysqli_fetch_array($result);

    if($row["dt_corr"] < date("Y/m/d H:i:s")){
        $date = "<br><p style="color:red; font-size:12px">".$row["dt_corr"]."</p>";
    }elseif($row["dt_corr"] > date("Y/m/d H:i:s")){
        $date = "<br><p style="color:green; font-size:12px">".$row["dt_corr"]."</p>";
    }
}else{
    $date = "";
}

Answer 2

if ($date < $now ){
    $date = "<br><font size=\"2px\" color=\"red\">".$row["dt_corr"]."</font>";}
else {
    $date = "<br><font size=\"2px\" color=\"green\">".$row["dt_corr"]."</font>";
}

代替上述脚本，使用 DateTime class 对象而不是字符串比较来比较日期时间总是更好。您可以像下面这样修改您的代码：

<?php

if (mysqli_num_rows($result) > 0) {
    $row = mysqli_fetch_array($result);
    $curr_dt = DateTime::createFromFormat("Y-m-d H:i:s", date("Y-m-d") . " 00:00:00");

    $row_dt = DateTime::createFromFormat("Y-m-d H:i:s", $row["dt_corr"]);

    $color = $row_dt < $curr_dt ? 'red' : 'green';

    echo "<br><font  style='color: $color; font-size:12px'>".date("d-m-Y H:i:s",strtotime($row["dt_corr"]))."</font >";
}

想要根据日期改变颜色

Want to make color change depending on date

html

php

database

datetime

datetime-format