<?php function upload($save_path,$custom_upload_max_filesize,$key,$type=array('jpg','jpeg','gif','png','txt')){ $return_data=array(); //获取phpini配置文件里面的upload_max_filesize值 $phpini=ini_get('upload_max_filesize'); //获取phpini配置文件里面的upload_max_filesize值的单位 $phpini_unit=strtoupper(substr($phpini,-1)); //获取phpini配置文件里面的upload_max_filesize值的数字部分 $phpini_number=substr($phpini,0,-1); //计算出转换成字节应该乘以的倍数 $phpini_multiple=get_multiple($phpini_unit); //转换成字节 $phpini_bytes=$phpini_number*$phpini_multiple; $custom_unit=strtoupper(substr($custom_upload_max_filesize,-1)); $custom_number=substr($custom_upload_max_filesize,0,-1); $custom_multiple=get_multiple($custom_unit); $custom_bytes=$custom_number*$custom_multiple; if($custom_bytes>$phpini_bytes){ $return_data['error']='传入的$custom_upload_max_filesize大于PHP配置文件里面的'.$phpini; $return_data['return']=false; return $return_data; } $arr_errors=array( 1=>'上传的文件超过了 php.ini中 upload_max_filesize 选项限制的值', 2=>'上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值', 3=>'文件只有部分被上传', 4=>'没有文件被上传', 6=>'找不到临时文件夹', 7=>'文件写入失败' ); if(!isset($_FILES[$key]['error'])){ $return_data['error']='由于未知原因导致，上传失败，请重试！'; $return_data['return']=false; return $return_data; } if ($_FILES[$key]['error']!=0) { $return_data['error']=$arr_errors[$_FILES['error']]; $return_data['return']=false; return $return_data; } if(!is_uploaded_file($_FILES[$key]['tmp_name'])){ $return_data['error']='您上传的文件不是通过 HTTP POST方式上传的！'; $return_data['return']=false; return $return_data; } if($_FILES[$key]['size']>$custom_bytes){ $return_data['error']='上传文件的大小超过了程序作者限定的'.$custom_upload_max_filesize; $return_data['return']=false; return $return_data; } $arr_filename=pathinfo($_FILES[$key]['name']); if(!isset($arr_filename['extension'])){ $arr_filename['extension']=''; } if(!in_array($arr_filename['extension'],$type)){ $return_data['error']='上传文件的后缀名必须是'.implode(',',$type).'这其中的一个'; $return_data['return']=false; return $return_data; } if(!file_exists($save_path)){ if(!mkdir($save_path,0777,true)){ $return_data['error']='上传文件保存目录创建失败，请检查权限!'; $return_data['return']=false; return $return_data; } } $new_filename=str_replace('.','',uniqid(mt_rand(100000,999999),true)); if($arr_filename['extension']!=''){ $new_filename.=".{$arr_filename['extension']}"; } $save_path=rtrim($save_path,'/').'/'; if(!move_uploaded_file($_FILES[$key]['tmp_name'],$save_path.$new_filename)){ $return_data['error']='临时文件移动失败，请检查权限!'; $return_data['return']=false; return $return_data; } $return_data['save_path']=$save_path.$new_filename; $return_data['filename']=$new_filename; $return_data['return']=true; return $return_data; } function get_multiple($unit){ switch ($unit){ case 'K': $multiple=1024; return $multiple; case 'M': $multiple=1024*1024; return $multiple; case 'G': $multiple=1024*1024*1024; return $multiple; default: return false; } } header("Content-type:text/html;charset=utf-8"); if(isset($_POST['submit'])){ $upload=upload('a/b/c','2M','myfile'); if(!$upload['return']){ var_dump($upload['error']); }else{ echo '上传成功！'; } } ?> <!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8" /> <title>上传页面</title> </head> <body> <form action="" method="post" enctype="multipart/form-data"> <input type="file" name="myfile" /> <input type="submit" name="submit" value="开始上传" /> </form> </body> </html>