如何向用户输入数组中的项添加数量？

I'm having a user input an item, and that item is being added to an array and displayed as it goes. How might I add a quantity field and also display this quantity next to the item? Thank you!

我正在为用户输入一个项目,并且该项目正在添加到数组中并在显示时显示。如何添加数量字段并在项目旁边显示此数量?谢谢!

<form  method="post">
`Add a new item: <input type="text" name="new_name"/>
<input type="submit"/>

<?php
$names = postVar('names') ? : array();
$names[] = postVar('new_name');
foreach ($names as $name) {
    echo $name . "<br/>";
    echo "<input type='hidden' name='names[]' value='$name'/>";
}
echo "Current items on list";

function postVar($name) {
    // only if exists
    if (! isset($_POST[$name])) {
        return null;
    }
    // fetch
    $out = $_POST[$name];
    // cleanup
    if (is_array($out)) {
        return array_map('htmlspecialchars', $out);
    }
    return htmlspecialchars($out);
}
?>

</form>

1 个解决方案

#1

I know you're doing this for testing and learning, so I won't go into details. In short:

我知道你这是为了测试和学习,所以我不会详细介绍。简而言之:

Change line 2 from

改变第2行

`Add a new item: <input type="text" name="new_name"/>

`Add a new item: <input type="text" name="new_name"/>, <input type="text" name="qty"/> pcs

Change lines 7-9 from

改变第7-9行

$names[] = postVar('new_name');
foreach ($names as $name) {
echo $name . "<br/>";

$names[postVar('new_name')] = postVar('qty');
foreach ($names as $name => $qty) {
echo $name . ", qty: " . $qty . "<br/>";

I let you figure out yourself - this is the best way to learn. Read about arrays in PHP Manual.

我让你弄清楚自己 - 这是最好的学习方法。阅读PHP手册中的数组。

#1