无法在PHP中上传5000kb pdf文件或图像

Question

我有问题。我无法将要上传的文件存储在我的网站上。它具有5000kb的大小，并且是pdf。

这是我的代码

if(!empty($_FILES['image-files-gallery']['tmp_name'])){
    if($_FILES['image-files-gallery']['size'] < 1000000){
        move_uploaded_file($_FILES['image-files-gallery']['tmp_name'],"uploaded_files/uploaded_files_gallery_images/" . $_FILES['image-files-gallery']['name']);
    }
    else{
        echo "File size is very big";
    }
}else{
    //nothing
}

if(!empty($_FILES['file-files-gallery']['tmp_name'])){
    if($_FILES['file-files-gallery']['size'] < 1000000){
        move_uploaded_file($_FILES['file-files-gallery']['tmp_name'], "uploaded_files/" . $_FILES['file-files-gallery']['name']);
    }
    else{
        echo "File size is very big";
    }
}
else
{
        //nothing
}