PHP文件上传综合示例

HTML代码

<?php
require('fileup.php');
if ($_FILES) :
    $file = new Fileup($_FILES, 'file');
    $result = $file->upload('uploadfile', 'image');
    file_ex($result);
    show($result);
endif;
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>文件上传</title>
</head>
<body>
    <form action="" method="post" enctype="multipart/form-data">
        <fieldset>
            <legend>单文件上传</legend>
            <input type="hidden" name="MAX_FILE_SIZE" value="700000">
            <input type="file" name="file[]">
            <input type="file" name="file[]">
            <input type="file" name="file[]">
            <input type="file" name="file[]">
            <button>上传</button>
        </fieldset>
    </form>
    <form action="" method="post" enctype="multipart/form-data">
        <fieldset>
            <legend>多文件上传</legend>
            <input type="hidden" name="MAX_FILE_SIZE" value="1000000">
            <input type="file" name="file[]" multiple>
            <button>上传</button>
        </fieldset>
    </form>
</body>
</html>

文件上传类和异常处理类

<?php
/**
 * 文件上传类
 */
class Fileup
{
    private $file_name, $file_tmp, $file_type, $file_error;
    public function __construct($file, $name)
    {
        $this->file_name = $file[$name]['name'];
        $this->file_type = $file[$name]['type'];
        $this->file_tmp = $file[$name]['tmp_name'];
        $this->file_error = $file[$name]['error'];
    }
    /**
     * 上传文件到指定目录,并可以过滤上传的文件类型
     *
     * @param [string] $path    上传文件在服务器保存的路径
     * @param [string] $type    指定上传的文件类型
     * @return array    返回关联二维数组[['name','error','url']...]
     */
    public function upload($path, $type = null)
    {
        $result = [];
        foreach ($this->file_error as $key => $value) {
            if ($value === 0) :
                if ($type && strstr($this->file_type[$key], '/', true) !== $type) :
                    $result[] = [
                        'name' => $this->file_name[$key],
                        'error' => 8,
                        'url' => null
                    ];
                    continue;
                endif;
                $a = $this->file_tmp[$key];
                $b = "$path/" . md5(time() + rand(0, 999))
                    . '.' . pathinfo($this->file_name[$key])['extension'];
                if (move_uploaded_file($a, $b)) :
                    $result[] = [
                        'name' => $this->file_name[$key],
                        'error' => UPLOAD_ERR_OK,
                        'url' => $b
                    ];
                else :
                    $result[] = [
                        'name' => $this->file_name[$key],
                        'error' => UPLOAD_ERR_CANT_WRITE,
                        'url' => null
                    ];
                endif;
            else :
                $result[] = [
                    'name' => $this->file_name[$key],
                    'error' => $value,
                    'url' => null
                ];
            endif;
        }
        return $result;
    }
}
/**
 * 文件上传异常类
 */
class File_exception extends Exception
{
    public function __toString()
    {
        return '错误代码(' . $this->code . ')，' . $this->message . '。<hr>';
    }
}
//返回异常并显示出来
function file_ex($result)
{
    foreach ($result as $value) {
        try {
            switch ($value['error']) {
                case UPLOAD_ERR_INI_SIZE:
                    throw new File_exception('上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值', 1);
                    break;
                case UPLOAD_ERR_FORM_SIZE:
                    throw new File_exception('上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值', 2);
                    break;
                case UPLOAD_ERR_PARTIAL:
                    throw new File_exception('文件只有部分被上传', 3);
                    break;
                case UPLOAD_ERR_NO_TMP_DIR:
                    throw new File_exception('找不到临时文件夹', 6);
                    break;
                case UPLOAD_ERR_CANT_WRITE:
                    throw new File_exception('文件写入失败', 7);
                    break;
                case 8:
                    throw new File_exception('文件类型错误', 8);
                    break;
            }
        } catch (File_exception $e) {
            echo $value['name'] . '：' . $e;
        }
    }
}
//预览上传成功的图片
function show($result)
{
    foreach ($result as $value) {
        if ($value['error'] === UPLOAD_ERR_OK) :
            $name = $value['name'];
            $v_url = $value['url'];
            $html = <<< hh
            <div style="width:22%;float:left;margin-right:3%"><div>$name</div><img style="width:100%" src="$v_url" alt=""></div>
            hh;
            echo $html;
        endif;
    }
    echo '<div style="clear:both"></div>';
}

HTML代码

文件上传类和异常处理类

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