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：
<form action="upload.php" method="post" enctype="multipart/form-data"> <p> <input type="file" name="pictures[]" /><br /> <input type="file" name="pictures[]" /><br /> <input type="file" name="pictures[]" /><br /> <input type="submit" value="上传" /> </p> </form> //手册中实例。 选择文件后点击上传 <?php print_r($_FILES); ?>
查看源文件：
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
<?php
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 < $up_cnt; $i++) {
if ($_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 < $up_cnt; $i ++) ,这个是遍历我们上面讲的一个个实例了。
永久链接：http://www.phprm.com/frame/php1005355.html
转载随意！带上文章地址吧。