upload文件上传

单文件上传

<?php
    if(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>

多文件上传

<?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>

单文件上传

多文件上传

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