The tools are as follows:
<?php class UploadHelper { //上传文件数组的名称 private $fileName; //允许上传的最大值 private $maxSize; //允许的上传类型 private $allowMime; //文件扩展名 private $allowExt; //上传文件到服务器的路径 private $uploadPath; //是否只允许上传图片 private $imgFlag; //上传文件信息 private $fileInfo; //上传错误码,1为正确 private $code = 1; //上传错误信息 private $error = 'success'; //文件扩展名 private $ext; //上传文件的地址:路径+文件名 private $destination; /** * 构造函数,这里面的参数都是默认的,在实际使用中,其实只需要指定一下 * uploadPath上传路径和imgFlag是否限制只允许上传图片即可 * @param $uploadPath 上传到服务器的路径 * @param $imgFlag 是否限制只允许上传图片 * @param $maxSize 允许上传的最大值 * @param $allowExt 允许上传文件的后缀名 * @param $allowMime 允许上传文件的类型 */ public function __construct($uploadPath='./uploads', $imgFlag = true, $maxSize=5242880, $allowExt=''/*array('jpeg', 'jpg', 'png', 'gif')*/, $allowMime=''/*array('image/jpeg', 'image/png', 'image/gif')*/) { $this->maxSize = $maxSize; $this->allowMime = $allowMime; $this->allowExt = $allowExt; $this->uploadPath = $uploadPath; $this->imgFlag = $imgFlag; $this->init(); } private function init() { $this->fileInfo = array(); foreach ($_FILES as $k => $v) { $this->fileInfo = $v; } if (!empty($this->fileInfo)) { $this->ext = strtolower(pathinfo($this->fileInfo['name'], PATHINFO_EXTENSION)); } } /** * 上传文件 * @return 如果上传失败那么就返回false,如果上传成功,那么返回路径 */ public function uploadFile() { if (!$this->checkError() || !$this->checkSize() || !$this->checkHTTPPost() || !$this->checkTrueImg()) { return false; } if (!empty($this->allowExt) && !$this->checkExt()) { return false; } if (!empty($this->allowMime) && !$this->checkMime()) { return false; } $this->checkUploadPath(); $this->uniName = $this->getUniName(); $this->destination = $this->uploadPath . '/' . $this->uniName . '.' . $this->ext; if (!@move_uploaded_file($this->fileInfo['tmp_name'], $this->destination)) { return false; } return $this->destination; } /** * 获取错误信息 */ public function getError() { return $this->error; } /** * 检测上传文件是否出错 * @return boolean */ private function checkError() { if (empty($this->fileInfo)) { $this->error = '文件上传出错'; $this->code = 1001; return false; } if ($this->fileInfo['error'] == 0) { return true; } switch ($this->fileInfo['error']) { case 1: $this->error = '超过了PHP配置文件中upload_max_filesize选项的值'; $this->code = 1002; break; case 2: $this->error = '超过了表单中MAX_FILE_SIZE设置的值'; $this->code = 1003; break; case 3: $this->error = '文件部分被上传'; $this->code = 1004; break; case 4: $this->error = '没有选择上传文件'; $this->code = 1005; break; case 6: $this->error = '没有找到临时目录'; $this->code = 1006; break; case 7: $this->error = '文件不可写'; $this->code = 1007; break; case 8: $this->error = '由于PHP的扩展程序中断文件上传'; $this->code = 1008; break; } return false; } /** * 检测上传文件的大小 * @return boolean */ private function checkSize() { if ($this->fileInfo['size'] > $this->maxSize) { $this->error = '上传文件过大'; $this->code = 1009; return false; } return true; } /** * 检测扩展名 * @return boolean */ private function checkExt() { if (!in_array($this->ext, $this->allowExt)) { $this->error = '不允许的扩展名'; $this->code = 1010; return false; } return true; } /** * 检测文件类型 * @return boolean */ private function allowMime() { if (!in_array($this->fileInfo['type'], $this->allowMime)) { $this->error = '不允许的文件类型'; $this->code = 1011; return false; } return true; } /** * 检测是否是真实图片 * @return boolean */ private function checkTrueImg() { if ($this->imgFlag) { if (!@getimagesize($this->fileInfo['tmp_name'])) { $this->error = '不是真实图片'; $this->code = 1012; return false; } return true; } return true; } /** * 检测是否通过HTTP POST方式上传的 * @return boolean */ private function checkHTTPPost() { if (!is_uploaded_file($this->fileInfo['tmp_name'])) { $this->error = '文件不是通过HTTP POST方式上传的'; $this->code = 1013; return false; } return true; } /** * 检测目录不存在,则创建 */ private function checkUploadPath() { if (!file_exists($this->uploadPath)) { mkdir($this->uploadPath, 0777, true); } } /** * 产生唯一字符串 * @return string */ private function getUniName() { return md5(uniqid(microtime(true), true)); } } ?>
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>文件上传</title> </head> <body> <form action="uploadHelperTest.php" method="post" enctype="multipart/form-data"> 上传: <input type="file" name="myFile" /><br/> <input type="submit" value="上传"> </form> </body> </html>
<?php header('content-type:text/html; charset=utf-8'); require_once 'UploadHelper.class.php'; $uploadHelper = new UploadHelper('./test', false); $destination = $uploadHelper->uploadFile(); if (!($destination === false)) { echo "$destination"; } echo $uploadHelper->getError(); ?>
The above introduces the implementation of file upload in PHP, including file upload and PHP content. I hope it will be helpful to friends who are interested in PHP tutorials.