php文件上传basename

Question

嘿，伙计们，我已经创建了 jquery ajax 文件上传器，但我有一个问题，那就是服务器端，它会覆盖任何具有相同名称的文件并且我将生成一个随机数，它应该是与另一个不同，但我的上传器的代码是

<?php
$target_path = "/var/www/vhosts/grubber.co.nz/httpdocs/developer/_social_development/uploads/blog/";
$target_path = $target_path . basename( $_FILES['img']['name']); 


if (file_exists($target_path)) {
    echo "The file $filename exists";
    $target_path = "/var/www/vhosts/grubber.co.nz/httpdocs/developer/_social_development/uploads/blog/" . basename( $_FILES['img']['name']); 
} else {
    echo "The file $filename does not exist";
}


if(move_uploaded_file($_FILES['img']['tmp_name'], $target_path)) {
    echo "The file ".  basename( $_FILES['img']['name']). 
    " has been uploaded";
} else{
    echo "There was an error uploading the file, please try again!";
}
?>

问题，我希望它检查文件是否存在，是否生成随机数并将其添加到名称中？ if not just continue 并写入文件。

Answer 1

一种解决方案是在文件名前添加一些唯一编号。

您可以使用 uniqid() 函数。 http://php.net/manual/en/function.uniqid.php

<?php
$target_path = "/var/www/vhosts/grubber.co.nz/httpdocs/developer/_social_development/uploads/blog/";
$target_path = $target_path . basename( $_FILES['img']['name']); 


if (file_exists($target_path)) {
    echo "The file $filename exists";
    $target_path = "/var/www/vhosts/grubber.co.nz/httpdocs/developer/_social_development/uploads/blog/" .uniqid().basename( $_FILES['img']['name']); 
} else {
    echo "The file $filename does not exist";
}


if(move_uploaded_file($_FILES['img']['tmp_name'], $target_path)) {
    echo "The file ".basename( $_FILES['img']['name']). 
    " has been uploaded";
} else{
    echo "There was an error uploading the file, please try again!";
}
?>