驗證PHP中的多選FIEID

Question

我有一個帶有多選文件字段的表單。現在我想檢查是否在單擊提交按鈕時選擇了文件。當前我正在使用以下代碼，

PHP代碼：-

<input type="file" id="files" name="files[]"  multiple="multiple"  />

<?php 


if(isset($_POST['submit']))
{

    if((isset($_FILES['files'])) && ($_FILES['files']['size'] > 0))
    {
        echo "Files is seleced";
    }
    else
    {
        echo "Please select file";
    }
}

?>

但是在單擊提交按鈕后，如果沒有選擇圖像，那么它還會顯示File is selected meassage.so，請提供一些解決方案。

Answer 1

$_FILES['files']是一個multidimensional數組

所以你必須檢查你的狀況

$sizes = $_FILES['files']['size'];

$sizes = array_filter($sizes); //remove all 0 values 

if((isset($_FILES['files'])) && (count($sizes) > 0))

例如：

Array
(
    [name] => Array
        (
            [0] => chtbg.jpg
            [1] => chtlg.jpg
            [2] => ddsports_bg.jpg
            [3] => ddsports_logo.jpg
        )

    [type] => Array
        (
            [0] => image/jpeg
            [1] => image/jpeg
            [2] => image/jpeg
            [3] => image/jpeg
        )

    [tmp_name] => Array
        (
            [0] => E:\xampp\tmp\php849B.tmp
            [1] => E:\xampp\tmp\php84AC.tmp
            [2] => E:\xampp\tmp\php84BC.tmp
            [3] => E:\xampp\tmp\php84CD.tmp
        )

    [error] => Array
        (
            [0] => 0
            [1] => 0
            [2] => 0
            [3] => 0
        )

    [size] => Array
        (
            [0] => 50891
            [1] => 40805
            [2] => 16985
            [3] => 1800
        )

)