图片上传脚本可选上传

Question

我试图更改当前的图像上传脚本，因此上传图像是可选的；我自己修改了它，将部分脚本注释掉，但不幸的是，该脚本一直输出错误消息，以显示“不正确的文件类型”。

如果有人能帮忙写剧本，那就太好了，谢谢(Y)

$image = '';
if (isset($_FILES['image']) === true) {
    $max_file_size = 2000000;
    /*if (empty($_FILES['image']['name']) === true) {
        $errors['image'] = "You have not chosen a image";
    } */ if( $_FILES['image']['size'] > $max_file_size ) {
        $errors['image'] = "File size too large";
    } else {
        $allowed = array('jpg', 'JPG', 'jpeg', 'gif', 'png', 'PNG',);

        $file_name = $_FILES['image']['name'];
        $file_extension = end((explode('.', $file_name)));
        $file_temp = $_FILES['image']['tmp_name'];

        if (in_array($file_extension, $allowed) === true) {
            $new_file_name = substr(md5(time()), 0, 10) . '.' . $file_extension;
            $image = $file_path = 'images/collections/' . $new_file_name;
            move_uploaded_file($file_temp, $file_path);
        } else {
            $errors['image'] = 'Incorrect file type. Allowed: ' . (implode(', ', $allowed));
        }
    }
}


<?php if (isset($errors['image'])/* && !empty($errors['image'])*/):?>
  <p class="c-img-error"><?php echo $errors['image']; ?></p>
<?php endif ;?>

  <div class="browse"><input type="file" name="image" value="" /> <span></span></div>

Answer 1

我会把第一个if声明改为这样-

if ( isset( $_FILES["image"] ) && !empty( $_FILES["image"]["name"] ) ) {

然后，在$errors数组中将不会注册错误，因为如果不存在图像文件，当前脚本将落入文件扩展名检查中。

Answer 2

$image = '';
if (isset( $_FILES["image"] ) && !empty( $_FILES["image"]["name"] ) ) {
    $max_file_size = 2000000;
    /*if (empty($_FILES['image']['name']) === true) {
        $errors['image'] = "You have not chosen a image";
    } */ if( $_FILES['image']['size'] > $max_file_size ) {
        $errors['image'] = "File size too large";
    } else {
        $allowed = array('jpg', 'JPG', 'jpeg', 'gif', 'png', 'PNG',);

        $file_name = $_FILES['image']['name'];
        $file_extension = end((explode('.', $file_name)));
        $file_temp = $_FILES['image']['tmp_name'];

        if (in_array($file_extension, $allowed) === true) {
            $new_file_name = substr(md5(time()), 0, 10) . '.' . $file_extension;
            $image = $file_path = 'images/collections/' . $new_file_name;
            move_uploaded_file($file_temp, $file_path);
        } else {
            $errors['image'] = 'Incorrect file type. Allowed: ' . (implode(', ', $allowed));
        }
    }
}