An example of php image upload code

PHP code for image uploading can determine file size, type, and generate file names by year, month, day, hour, minute, and second. It is suitable for reference by beginners.

The code is as follows.

 <?php
/**
* 图片上传
* site http://bbs.it-home.org
*/
$upload_file=$_FILES['upload_file']['tmp_name'];
echo $upload_file;
$upload_file_name=$_FILES['upload_file']['name'];
$type=strstr($upload_file_name, '.');

$newid = date("YmdHis");

    if($upload_file=="")
      {
       $newname="0.jpg"; 
      }
   else
   {
   $newname=$newid.$type;
   }
//$newname=$newid.$type;
$intonew2="update mms_news_info set col_image='$newname' where col_id='$newid'";
mysql_query($intonew2,$db);

if($upload_file){
$file_size_max = 1000*1000;// 1M限制文件上传最大容量(bytes)
$store_dir = "neirongimg/";// 上传文件的储存位置
$accept_overwrite = 1;//是否允许覆盖相同文件
// 检查文件大小
if ($upload_file_size > $file_size_max) {
echo "对不起，你的文件容量大于规定";
exit;
}
// 检查读写文件
if (file_exists($store_dir . $upload_file_name) && $accept_overwrite) {
Echo   "存在相同文件名的文件";
exit;
}
//复制文件到指定目录
if (!move_uploaded_file($upload_file,$store_dir.$newname)) {
echo "复制文件失败";
exit;
}
}
Echo   "<p>你上传了文件:";
echo  $_FILES['upload_file']['name'];
echo "<br>";
//客户端机器文件的原名称。 
Echo   "文件的 MIME 类型为:";
echo $_FILES['upload_file']['type'];
//文件的 MIME 类型，需要浏览器提供该信息的支持，例如“image/gif”。 
echo "<br>";
Echo   "上传文件大小:";
echo $_FILES['upload_file']['size'];
//已上传文件的大小，单位为字节。 
echo "<br>";
Echo   "文件上传后被临时储存为:";
echo $_FILES['upload_file']['tmp_name'];
//文件被上传后在服务端储存的临时文件名。 
echo "<br>";

$Erroe=$_FILES['upload_file']['error'];
switch($Erroe){
        case 0:
            Echo   "上传成功"; break;
        case 1:
            Echo   "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值."; break;
        case 2:
            Echo   "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。";    break;
        case 3:
            Echo   "文件只有部分被上传";break;
        case 4:
            Echo   "没有文件被上传";break;
}
//图片上传处理
?>