linux 下用PHP实现上传文件到服务器？

linux 下用PHP实现上传文件到服务器？
服务器软件为apache2
php.ini 中
upload_tmp_dir="/opt/lampp/apache2/htdocs/upload/"

upload 有读写权限
页面显示结果为：
Stored in: /tmp/phppkZB34
tmp同样拥有读写权限

但在tmp中找不到”phppkZB34“这个文件

---

php<?php
    if($_FILES["file"] == NULL){
        echo "<br /><a href='../Submit/'>Return</a><br />";
    }else if ((($_FILES["file"]["type"] == "image/gif")
        || ($_FILES["file"]["type"] == "image/jpeg")
        || ($_FILES["file"]["type"] == "image/pjpeg")
        || ($_FILES["file"]["type"] == "image/png"))
        && ($_FILES["file"]["size"] < (500*1024)))
      {
      if ($_FILES["file"]["error"] > 0)
        {
        echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
        }
      else
        {
        echo "Image Details: <br><ul>";
        echo "<li>Upload: " . $_FILES["file"]["name"] . "</li>";
        echo "<li>Type: " . $_FILES["file"]["type"] . "</li>";
        echo "<li>Size: " . ($_FILES["file"]["size"] / 1024) . " Kb.</li>";
        //echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

        if (file_exists("upload/" .date('Ymd_'). $_FILES["file"]["name"])){
            echo "<br />".date('Ymd_').$_FILES["file"]["name"]." already exists. <br />Fail to Upload.<br />";
            echo "<strong>Click <a href=". "upload/" .date('Ymd_'). $_FILES["file"]["name"]." target='_blank'>HERE</a> to check.</strong>";
            }else{
              move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" .date('Ymd_'). $_FILES["file"]["name"]);
              echo "<li>Stored in: " . "upload/" .date('Ymd_'). $_FILES["file"]["name"].".</li>";
              echo "<li>Permanent Link: <a target='_blank' href=". "upload/" .date('Ymd_'). $_FILES["file"]["name"].">". "upload/" .date('Ymd_'). $_FILES["file"]["name"]."</a></li>";
              echo "</ul>";
          }
        }
      }
    else
      {
      echo "<br>Invalid file. <br>Only png/jpeg/jpg/gif files under 500Kb can be uploaded here.<br>";
      }
?>

我写的，供参考。

---

上传文件后你需要把 /tmp/phppkZB34 文件(使用move_uploaded_file函数)移动到你自己的目录中，会话结束后 /tmp/phppkZB34 会被删除。函数的使用方式自己去问度娘吧