PHP从表单输入字段创建数组[关闭]

Question

I'm trying to create an array to store numbers and add them together.

<input type="number" name="numbers[]"/>

I'm getting an undefined variable on the following line

foreach($numbers as $number)

I'm sure this is probably something basic but I'm relatively new to php and help would be greatly appreciated.

Answer 1

If you want to get the sum of an array you dont need to loop you can use array_sum

Example

<?php
if (isset($_POST['numbers'])) {
    echo array_sum($_POST['numbers']);
}

?>

<form method="POST">
<input type="number" name="numbers[]"/>
<input type="number" name="numbers[]"/>
<input type="number" name="numbers[]"/>
<input type="number" name="numbers[]"/>
<input type="submit" value="add"/>
</form>