PHP多文件上传理解总结

上传文件HTML的输入标签FILE类型中的名称后要加[]，作用是在HTML中向PHP建立数组，比如名称为pictures，多文件引用名称则为pictures[],实例如下：

代码如下	复制代码
//手册中实例。

选择文件后点击上传

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print_r($_FILES); ?>

查看源文件：

代码如下

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Array ( [pictures] => Array ( [name] => Array ( [0] => file1.txt [1] => file2.txt [2] => file3.txt ) [type] => Array ( [0] => application/octet-stream [1] => application/octet-stream [2] => application/octet-stream ) [tmp_name] => Array ( [0] => D:EasyPHPtmpphp47.tmp [1] => D:EasyPHPtmpphp48.tmp [2] => D:EasyPHPtmpphp49.tmp ) [error] => Array ( [0] => 0 [1] => 0 [2] => 0 ) [size] => Array ( [0] => 94289 [1] => 65536 [2] => 102400 ) ) )

假设名为 /file1.txt??和 /file2.txt 的文件被提交，则 $_FILES['pictures']['name'][0] 的值将是 file1.txt，而 $_FILES['pictures']['name'][1] 的值将是 file2.txt。类似的，$_FILES['file2.txt']['size'][0] 将包含文件 file1.txt 的大小，

有了上面信息了我们要实现多文件上传就简单了

代码如下

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class upload { public $up_ext=array(), $up_max=5210, $up_dir; private $up_name, $up_rename=true, $up_num=0, $up_files=array(), $up_ret=array(); function __construct($name, $ext=array(), $rename=true) { if (!empty($name)) { $this->up_name = $name; !empty($ext) && $this->up_ext = $ext; $this->up_rename = $rename; $this->up_dir = website_dirroot. $globals['cfg_upload_path']; $this->initupload(); } else { exit('upload文件域名称为空，初始化失败！'); } } private function initupload() { if (is_array($_files[$this->up_name])) { $up_arr = count($_files[$this->up_name]); $up_all = count($_files[$this->up_name], 1); $up_cnt = ($up_all - $up_arr) / $up_arr; for ($i = 0; $i if ($_files[$this->up_name]['error'][$i] != 4) { $this->up_files[] = array( 'tmp_name' => $_files[$this->up_name]['tmp_name'][$i], 'name' => $_files[$this->up_name]['name'][$i], 'type' => $_files[$this->up_name]['type'][$i], 'size' => $_files[$this->up_name]['size'][$i], 'error' => $_files[$this->up_name]['error'][$i] ); } } $this->up_num = count($this->up_files); } else { if (isset($_files[$this->up_name])) { $this->up_files = array( 'tmp_name' => $_files[$this->up_name]['tmp_name'], 'name' => $_files[$this->up_name]['name'], 'type' => $_files[$this->up_name]['type'], 'size' => $_files[$this->up_name]['size'], 'error' => $_files[$this->up_name]['error'] ); $this->up_num = 1; } else { exit('没找找到需要upload的文件！'); } } $this->chkupload(); } private function chkupload() { if (empty($this->up_ext)) { $up_mime = array('image/wbmp', 'image/bmp', 'image/gif', 'image/pjpeg', 'image/x-png'); foreach ($this->up_files as $up_file) { $up_allw = false; foreach ($up_mime as $mime) { if ($up_file['type'] == $mime) { $up_allw = true; break; } } !$up_allw && exit('不允许上传'.$up_file['type'].'格式的文件！'); if ($up_file['size'] / 1024 > $this->up_max) { exit('不允许上传大于 '.$this->up_max.'k 的文件！'); } } } else { foreach ($this->up_files as $up_file) { $up_ext = end(explode('.', $up_file['name'])); $up_allw = false; foreach ($this->up_ext as $ext) { if ($up_ext == $ext) { $up_allw = true; break; } } !$up_allw && exit('不允许上传.'.$up_ext.'格式的文件！'); if ($up_file['size'] / 1024 > $this->up_max) { exit('不允许上传大于 '.$this->up_max.'k 的文件！'); } } } $this->uploading(); } private function uploading() { if (io::dircreate($this->up_dir)) { if (chmod($this->up_dir, 0777)) { if (!empty($this->up_files)) { foreach ($this->up_files as $up_file) { if (is_uploaded_file($up_file['tmp_name'])) { $file_name = $up_file['name']; if ($this->up_rename) { $file_ext = end(explode('.', $file_name)); $file_rnd = substr(md5(uniqid()), mt_rand(0, 26), 6); $file_name = date('ymdhis').'_'.$file_rnd.'.'.$file_ext; } $file_name = $this->up_dir.'/'.$file_name; if (move_uploaded_file($up_file['tmp_name'], $file_name)) { $this->up_ret[] = str_replace(website_dirroot, '', $file_name); } else { exit('文件上传失败！'); } } } } } else { exit('未开启写入权限！'); } } else { exit('上传目录创建失败！'); } } public function getupload() { return empty($this->up_ret) ? false : $this->up_ret; } function __destruct() {} } ?>

在上面我们会看到一个for ($i = 0; $i