Splitting a filename into name and extension

PHP
1

I have a php script which I’ve adapted from online tutorials.

<?php
// Where the file is going to be placed
$target_path="/var/savedfiles/".$subdirectory."/";

// rename file to remove web-unfriendly characters
$OriginalFilename = $FinalFilename = preg_replace('`[^a-z0-9-_.]`i','',$_FILES['uploadedfile']['name']);

// rename file if it already exists by prefixing an incrementing number
$FileCounter = 1;
// loop until an available filename is found
while (file_exists($target_path.$FinalFilename ))
$FinalFilename = $FileCounter++.'_'.$OriginalFilename;

// Add the original filename to our target path.
$target_path = $target_path . $FinalFilename;

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
    echo "The file ".  $FinalFilename.
    " has been uploaded";
} else{
        echo "There was an error uploading ".  $OriginalFilename.
    ", your file may be greater than 1Gb. Please try again!";
}
?>

The above works well except for duplicate files it adds number in front e.g. 1_filename.extension

What I want is filename_1.extension

The following almost works but the filename is lost

<?php
// Where the file is going to be placed
$target_path="/var/savedfiles/".$subdirectory."/";

// rename file to remove web-unfriendly characters
$OriginalFilename = $FinalFilename = preg_replace('`[^a-z0-9-_.]`i','',$_FILES['uploadedfile']['name']);

$parts=pathinfo($FinalFilename);
$Extension = $parts['extension'];
$FileName = basename($parts,'.'.$Extension);

// rename file if it already exists by prefixing an incrementing number
$FileCounter = 1;
// loop until an available filename is found
while (file_exists($target_path.$FinalFilename ))
$FinalFilename = $FileName."_".$FileCounter++.".".$Extension;

// Add the original filename to our target path.
$target_path = $target_path . $FinalFilename;

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
    echo "The file ".  $FinalFilename.
    " has been uploaded";
} else{
        echo "There was an error uploading ".  $OriginalFilename.
    ", your file may be greater than 1Gb. Please try again!";
}
?>

But the filename is lost so what I get is _1.extension

What am I doing wrong?

2

Try something like:

<?php

$filename = 'gm_script.user.js';
$file_name_and_extenstions = explode(".",$filename);

echo '<pre>'.var_dump($file_name_and_extenstions).'</pre>';
?>

That will split up a string in parts, spliting it wherever there is a . and it places each part as a seperate element of an array

3 
$FileName = basename($parts,'.'.$Extension);

First, $parts is an array; it does not make sense to try and get the base name of an array. This explains why the file name part goes missing from the $FinalFilename, basename() returns NULL when you give it input it doesn’t expect. When the NULL is converted to a string, it becomes an empty string.

Second, why use basename() at all, your $parts array will already hold the file name.

$FileName = $parts['filename'];

Finally, when developing, always make sure to have your error_reporting level turned as high as possible, -1 will do the trick, and that you’re displaying errors (display_errors = On). If you did this, you’d see the error message that PHP gives when trying to get the base name of that array: Warning: basename() expects parameter 1 to be string, array given in <filename> on line <number>.

4

Excellent this worked. I should have seen it early especially since I used the ‘extension’ code.

$FileName = $parts[‘filename’];

Thanks for the tip on using error messages… really helpful :slight_smile:

5

http://www.php.net/manual/en/function.pathinfo.php

6

What you are looking for is called ‘basename’:
$FileName = $parts[‘basename’];

At which point I wouldn’t waste the overhead on the extra variables, and would just use $parts code-wide.


&lt;?php

// Where the file is going to be placed
$target_path="/var/savedfiles/".$subdirectory."/";

// rename file to remove web-unfriendly characters
$originalFilename=$finalFilename=preg_replace(
	'`[^a-z0-9-_.]`i',
	'',
	$_FILES['uploadedfile']['name']
);

$fileInfo=pathinfo($finalFilename);

// rename file if it already exists by prefixing an incrementing number
$fileCounter=1;
// loop until an available filename is found
while (file_exists($target_path.$finalFilename)) {
	$finalFilename=(
		$fileInfo['baseName'].'_'.
		$fileCounter++.'.'.
		$fileInfo['extension']
	);
}

// Add the original filename to our target path.
$target_path.=$finalFilename;

if (move_uploaded_file(
	$_FILES['uploadedfile']['tmp_name'],
	$target_path
)) {
	echo '
		The file '.$finalFilename.' has been uploaded
	';
} else {
	echo '
		There was an error uploading '.$originalFilename.',
		your file may be greater than 1Gb. Please try again!
  ';
}
?&gt;

naturally, more meaningful variable names, ditching the double quotes, and some consistent formatting never hurts.

7

The basename includes the file extension, which is not what abasel wanted. As already mentioned, the filename item in the array has what he needs.

8

Oops, yer right. Man, I’m slipping badly tonight on this stuff… You are correct, should be ‘filename’ and not ‘basename’.