SQL查询不能使用DATE_FORMAT方法在PHP文件上重新格式化日期吗？

Question

By default, PHPMyAdmin has the datetime column formatted as YYYY-MM-DD, but I'm trying to reformat it into MM-DD-YYYY using an SQL statement on my PHP file. This is the code I used, but it's not working:

<?php
$usertext = $_POST['textinput'];
$insertsql = "INSERT INTO testtext (usertext) VALUES ('$usertext')";

if (isset($_POST['textinput'])) {
    require '../db.php';
    mysqli_query($db, $insertsql);
}

$selectdate = "SELECT textdate, DATE_FORMAT(textdate,'%m/%d/%Y') AS newdate FROM testtext";
$dateresult = mysqli_query($db, $selectdate);

while ($row = mysqli_fetch_assoc($dateresult)) {
    echo "{$row['textdate']}<br>";
}
?>

This code is able to display rows from the 'textdate' column onto my test site just fine, but the DATE_FORMAT code was unable to reformat the date. Can you please help me fix this code? Thanks so much.

Answer 1

You are calling your formatted date newdate but are referring to textdate in your code. You need to refer to that alias you assigned the results of DATE_FORMAT() to and not the original column identifier.

while ($row = mysqli_fetch_assoc($dateresult)) {
    echo "{$row['newdate']}<br>";
}