本实例以上传图片为例

前端表单配置

注意这里name是数组格式images[]，如果不是[]只能传递一个文件到服务端，此外还有注意multiple的设置。

<input type="file" name='images[]' multiple="multiple" accept=".png, .jpg, .jpeg, .gif"> 

后端服务端的处理

// GET NAME
$name = $input->post->name;
$p_name = $sanitizer->pageName(time() . '-' . $name);
// START CREATING PAGE
   $p = new Page();
// TEMPLATE TO SAVE ITEM
   $p->template = "contact-item";
// Parent Page
    $p->parent = $pages->get("/contact/");
// TURN OFF OUTPUT FORMATTING, IF IT'S ON
    $p->of(false);
// START SAVING INPUT FIELDS
    $p->title = $name;
    $p->name = $p_name;
// Page Save
    $p->save();

// UPLOAD IMAGES ( If input images was submitted )
    if ($_FILES['images']['name'][0] == true) {
// Set Maximum Files
    $max_files = 3;
// Find Created Page id
    $get_id = pages()->get("name=$p_name");
// Final destination Folder
    $upload_path = $pages->get($get_id->id)->images->path;
// Instantiate the class and give it the name of the HTML field
    $p_images = new WireUpload('images');
// Tell it to only accept 3 file
    $p_images->setMaxFiles($max_files);
// Set Max File Size to 1MB or 2MB => (1024*1024*2)
    $p_images->setMaxFileSize(1024*1024);
// Tell it to rename rather than overwrite existing files
    $p_images->setOverwrite(false);
// have it put the files in their final destination. this should be okay since
// The WireUpload class will only create PW compatible filenames
    $p_images->setDestinationPath($upload_path);
// Tell it what extensions to expect
    $p_images->setValidExtensions(array('jpg', 'jpeg', 'png', 'gif'));
// Execute upload and check for errors
    $files = $p_images->execute();

// Run a count($files) test to make sure there are actually files; if so, proceed; if not, generate getErrors()
if(!count($files))
{
$err = __("Sorry, but you need to add a Photo File like ( 'jpg', 'jpeg', 'png', 'gif' ) !!! ... Max Size ( 1MB ) !!!");
// ADD SOME SESSION MESSAGE
$session->info = "<div class='alert-d'><h1>{$err}</h1></div>";
// TRASH OR DELETE FILE IF NOT EXSIST IMG FILE
// $pages->delete($get_id);
     // Or Only Trash
$pages->trash($get_id);
// Redirect
    $session->redirect('./');
}
// Check If To Many Files
if( count($_FILES['images']['name']) > $max_files )
{
$err = __("To Many Images ( MAX 3 Image ) !!! ");
// ADD SOME SESSION MESSAGE
$session->info = "<div class='alert-d'><h1>{$err}</h1></div>";
// TRASH OR DELETE FILE IF NOT EXSIST IMG FILE
// $pages->delete($get_id);
     // OR Only Trash
$pages->trash($get_id);
// Redirect
    $session->redirect('./');
}

// turn off output formatting, if it's on
    $p->of(false);

// SET IMAGES VALUE
    foreach ($files as $file) {
        // $item .= $upload_path.$file . ',';
            // SET IMAGES FIELD
            $p->set("images",$file);
    }
// SAVE IMAGE **************** /
    $p->save();

// SUCCESS MESSAGE
    $success = __("Congratulations, you've added Pictures");
// ADD SOME SESSION MESSAGE
    $session->info = "<div class='succes-m'><h1>{$success}</h1></div>";

// Redirect
$session->redirect('./');
}