请检查代码的最后一部分,其中 input type="submit"name="save_changes_submit"。此表单未在 $_POST 中分配。我在这里做什么错了?我在这里做的任何 html 错误吗?我怎样才能从这个提交中获得 $_POST 值?
echo '<form action="" method="post">ID Number:<input type="number" name="id_number" value="number"><br><br><input type="submit" value="Search Product" name="id_number_submit">';
if (isset($_POST['id_number_submit'])) {
$id_number = $_POST['id_number'];
$q = mysqli_query($conn, "SELECT * FROM product WHERE id='$id_number'");
$row = mysqli_fetch_array($q);
if (empty($row)) {
echo "Error: Invalid product id";
}else{
$product_name = $row['product_name'];
$product_des = $row['product_des'];
$product_price = $row['product_price'];
echo '<br><br><input type="number" name="product_price" value="'.$product_price.'">';
echo '<br><br><input type="text" name="product_name" value="'.$product_name.'">';
echo '<br><br><textarea rows="8" cols="100" name="product_des">'.$product_des.'</textarea><br><input type="submit" value="Save Changes" name="save_changes_submit">';
if (isset($_POST['save_changes_submit'])) {
echo $c_product_price = $_POST['product_price'];
echo $c_product_name = $_POST['product_name'];
echo $c_product_des = $_POST['product_des'];
}
}
}
echo '</form>';
最佳答案
if 条件 if(isset($_POST['save_changes_submit']))
在 if(isset($_POST['id_number_submit']))
中。这就是问题所在。在这里。
<?php
echo '<form action="" method="post">ID Number:<input type="number" name="id_number" value="number"><br><br><input type="submit" value="Search Product" name="id_number_submit">';
if(isset($_POST['id_number_submit'])) {
$id_number = $_POST['id_number'];
$q = mysqli_query($conn, "SELECT * FROM product WHERE id='$id_number'");
$row = mysqli_fetch_array($q);
if (empty($row)){
echo "Error: Invalid product id";
}else{
$product_name = $row['product_name'];
$product_des = $row['product_des'];
$product_price = $row['product_price'];
echo '<br><br><input type="number" name="product_price" value="'.$product_price.'">';
echo '<br><br><input type="text" name="product_name" value="'.$product_name.'">';
echo '<br><br><textarea rows="8" cols="100" name="product_des">'.$product_des.'</textarea><br><input type="submit" value="Save Changes" name="save_changes_submit">';
}
}
if(isset($_POST['save_changes_submit'])) {
echo $c_product_price = $_POST['product_price'];
echo $c_product_name = $_POST['product_name'];
echo $c_product_des = $_POST['product_des'];
}
echo '</form>';
?>
关于php - 为什么 html 输入提交不分配 $_POST 数组值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38049177/