实现拖放上传功能的 jQuery 插件

<?php // If you want to ignore the uploaded files, // set $demo_mode to true; $demo_mode = false; $upload_dir = 'uploads/'; $allowed_ext = array('jpg','jpeg','png','gif'); if(strtolower($_SERVER['REQUEST_METHOD']) != 'post'){ exit_status('Error! Wrong HTTP method!'); } if(array_key_exists('pic',$_FILES) && $_FILES['pic']['error'] == 0 ){ $pic = $_FILES['pic']; if(!in_array(get_extension($pic['name']),$allowed_ext)){ exit_status('Only '.implode(',',$allowed_ext).' files are allowed!'); } if($demo_mode){ // File uploads are ignored. We only log them. $line = implode(' ', array( date('r'), $_SERVER['REMOTE_ADDR'], $pic['size'], $pic['name'])); file_put_contents('log.txt', $line.PHP_EOL, FILE_APPEND); exit_status('Uploads are ignored in demo mode.'); } // Move the uploaded file from the temporary // directory to the uploads folder: if(move_uploaded_file($pic['tmp_name'], $upload_dir.$pic['name'])){ exit_status('File was uploaded successfuly!'); } } exit_status('Something went wrong with your upload!'); // Helper functions function exit_status($str){ echo json_encode(array('status'=>$str)); exit; } function get_extension($file_name){ $ext = explode('.', $file_name); $ext = array_pop($ext); return strtolower($ext); } ?>