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<?phpif(isset($_FILES['userfile'])){$error = $_FILES['userfile']['error'];// var_dump($error);if($error){switch($error){case 1: echo "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值.";break;case 2: echo "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值.";break;case 3: echo "文件只有部分被上传。";break;case 4: echo "没有文件被上传。";break;case 6: echo "找不到临时文件夹。";break;case 7: echo "文件写入失败。";default: echo "未知错误";}}else{$name =pathinfo($_FILES['userfile']['name'])['filename'];$ext = pathinfo($_FILES['userfile']['name'])['extension'];$newFileName = 'upload/'.md5($name).'.'.$ext;// var_dump($newFileName,$_FILES['userfile']['tmp_name']);if(move_uploaded_file($_FILES['userfile']['tmp_name'],"$newFileName")){echo "上传成功";}else{echo '123';}}}?><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>文件上传功能</title></head><body><h1>单文件上传功能</h1><form action="demo.php" method="POST" enctype="multipart/form-data"><input type="hidden" name="MAX_FILE_SIZE" value="1048576"><input type="file" name="userfile" id=""><button>上传</button></form></body></html>
<?php// var_dump($_FILES);$message = "";foreach($_FILES['userfile']['error'] as $key => $value){if(!$value){switch($value){case 1: $message .="第{$key}个文件上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。"."<br>";break;case 2: $message .="第{$key}个文件上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。"."<br>";break;case 3: $message .="第{$key}个文件文件只有部分被上传。"."<br>";break;case 4: $message .="第{$key}个文件没有文件被上传。"."<br>";break;case 6: $message .="第{$key}个文件找不到临时文件夹。"."<br>";break;case 7: $message .="第{$key}个文件文件写入失败。"."<br>";// default: echo "未知错误";}}}if($message){echo $message;exit;}foreach($_FILES['userfile']['error'] as $key => $value){if(is_uploaded_file($_FILES['userfile']['tmp_name'][$key])){$newFileName = 'upload/'.$_FILES['userfile']['name'][$key];$oldFileName = $_FILES['userfile']['tmp_name'][$key];move_uploaded_file($oldFileName,$newFileName);echo "上传成功";}else{echo "未知错误";}}?><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>文件上传功能</title></head><body><h1>多文件上传功能</h1><form action="demo.php" method="POST" enctype="multipart/form-data"><!-- <input type="hidden" name="MAX_FILE_SIZE" value="1048576"> --><input type="file" name="userfile[]" id="" multiple><button>上传</button></form></body></html>
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