上傳文件HTML的輸入標簽FILE類型中的名稱後要加[]，作用是在HTML中向PHP建立數組，比如名稱為pictures，多文件引用名稱則為pictures[],實例如下： 代碼如下 復制代碼
<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=”上傳” />
</p>
</form> //手冊中實例。
選擇文件後點擊上傳
代碼如下 復制代碼<?php
print_r($_FILES);
?>
查看源文件：
代碼如下 復制代碼 Array假設名為 /file1.txt??和 /file2.txt 的文件被提交，則 $_FILES['pictures']['name'][0] 的值將是 file1.txt，而 $_FILES['pictures']['name'][1] 的值將是 file2.txt。類似的，$_FILES['file2.txt']['size'][0] 將包含文件 file1.txt 的大小，
有了上面信息了我們要實現多文件上傳就簡單了
代碼如下 復制代碼<?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'];
$this->initupload();
} else {
exit('upload文件域名稱為空，初始化失敗！');
}
}
private function initupload() {
if (is_array($_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('沒找找到需要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('不允許上傳'.$up_file['type'].'格式的文件！');
if ($up_file['size'] / 1024 > $this->up_max) {
exit('不允許上傳大於 '.$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('不允許上傳.'.$up_ext.'格式的文件！');
if ($up_file['size'] / 1024 > $this->up_max) {
exit('不允許上傳大於 '.$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, '', $file_name);
} else {
exit('文件上傳失敗！');
}
}
}
}
} else {
exit('未開啟寫入權限！');
}
} else {
exit('上傳目錄創建失敗！');
}
}
public function getupload() {
return empty($this->up_ret) ? false : $this->up_ret;
}
function __destruct() {}
}
?>
在上面我們會看到一個for ($i = 0; $i < $up_cnt; $i ++) ,這個是遍歷我們上面講的一個個實例了。
