Question

我在重复的名字中遇到了一个小问题。我想自动重命名任何重复的上传文件，例如编号。

或者如果我可以将名称与数字相同，例如file1.jpg / file2.jpg 对于所有上传的文件

这是我的代码

<?php

	include('connect-db.php');
  
	if (isset($_POST['submit'])) {
		

$filename=  $_FILES["imgfile"]["name"];
  if ((($_FILES["imgfile"]["type"] == "image/gif")|| ($_FILES["imgfile"]["type"] == "image/jpeg") || ($_FILES["imgfile"]["type"] == "image/png")  || ($_FILES["imgfile"]["type"] == "image/pjpeg")) && ($_FILES["imgfile"]["size"] < 20000000))



  {
    if(file_exists($_FILES["imgfile"]["name"]))
    {
      echo "File name exists.";
    }

    else
    {
      move_uploaded_file($_FILES["imgfile"]["tmp_name"],"photos/$filename");
    }


  }
 

		if (is_numeric($_POST['id'])) {
			$id = $_POST['id'];
			
			$id_photo= mysql_real_escape_string(htmlspecialchars($_POST['filename']));

			// check that firstname/lastname fields are both filled in
			
			if ($filename== '' ) {
				// generate error message
				$error = 'ERROR: Please fill in all required fields!';

echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META

			} else {
				// save the data to the database
				mysql_query("UPDATE table SET id_photo='$filename' WHERE id='$id' ") or die(mysql_error());
				// once saved, redirect back to the view page

echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META

			}

		} else {
			// if the 'id' isn't valid, display an error
			echo 'Error!';
		}
 
	}
	
	
	?>

甚至if的回声（file_exists（$ _ FILES [“imgfile”] [“name”]））它不起作用，我不知道为什么

在回复之前非常感谢

Answer 1

试试这段代码 此代码永远不会得到相同名称此代码将重命名文件，如2jh5425h44u5h45h454k5image.jpg这就是它将如何保存文件所以无需担心重复文件我添加了随机名称生成器$newname = md5(rand() * time());，这将为您的文件生成随机名称

    <?php

include('connect-db.php');
$newname = md5(rand() * time());
if (isset($_POST['submit'])) {

    $filename = $_FILES["imgfile"]["name"];
    if ((($_FILES["imgfile"]["type"] == "image/gif") || ($_FILES["imgfile"]["type"] == "image/jpeg") || ($_FILES["imgfile"]["type"] == "image/png") || ($_FILES["imgfile"]["type"] == "image/pjpeg")) && ($_FILES["imgfile"]["size"] < 20000000)) {
        if (file_exists($_FILES["imgfile"]["name"])) {
            echo "File name exists.";
        } else {
            move_uploaded_file($_FILES["imgfile"]["tmp_name"], "photos/$newname . $filename");
        }
    }
    if (is_numeric($_POST['id'])) {
        $id = $_POST['id'];

        $id_photo = mysql_real_escape_string(htmlspecialchars($_POST['filename']));

        // check that firstname/lastname fields are both filled in

        if ($filename == '') {
            // generate error message
            $error = 'ERROR: Please fill in all required fields!';

            echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META
        } else {
            // save the data to the database
            mysql_query("UPDATE table SET id_photo='$filename' WHERE id='$id' ") or die(mysql_error());
            // once saved, redirect back to the view page

            echo("<meta http-equiv='refresh' content='0'>"); //Refresh by HTTP META
        }
    } else {
        // if the 'id' isn't valid, display an error
        echo 'Error!';
    }
}
?>

如果您只需要在文件重复时重命名，请回答Renaming duplicate files in a folder with php

如果有重复的名称，如何重命名上传的文件

1 个答案: