Renaming files in PHP? - php

Question

I want the script to go into the folder 'images', take every file, cut the first four characters and rename it.
PHP
<?php
$path = './images/';
if ($handle = opendir($path))
{
while (false !== ($fileName = readdir($handle)))
{
if($fileName!=".." && $fileName!=".")
{
$newName = substr($fileName, 4);
$fileName = $path . $fileName;
$newName = $path . $newName;
rename($fileName, $newName);
}
}
closedir($handle);
}
?>
This is how the files in the images folder are named:
0,78test-1.jpg
0,32test-2.jpg
0,43test-3.jpg
0,99test-4.jpg
and this is what i want them to look like:
test-1.jpg
test-2.jpg
test-3.jpg
test-4.jpg
The problem is the script cuts out the first 8, 12 or 16 characters, not four as i want it! So when i execute it my files look like this:
-1.jpg
-2.jpg
-3.jpg
-4.jpg
UPDATE
I also tracked the packages to make sure i am not executing the script multiple times. The script is only executed once!

Answer 1

A slightly different approach though essentially the same with the substr part this worked fine for tests on local system.
$dir='c:/temp2/tmpimgs/';
$files=glob( $dir . '*.*' );
$files=preg_grep( '#(\.jpg$|\.jpeg$|\.png$)#i', $files );
foreach( $files as $filename ){
try{
$path=pathinfo( $filename, PATHINFO_DIRNAME );
$name=pathinfo( $filename, PATHINFO_BASENAME );
$newname=$path . DIRECTORY_SEPARATOR . substr( $name, 4, strlen( $name ) );
if( strlen( $filename ) > 4 ) rename( $filename, $newname );
} catch( Exception $e ){
echo $e->getTraceAsString();
}
}

Answer 2

You may want to try this little Function. It would do just the proper renaming for you:
<?php
$path = './images/';
function renameFilesInDir($dir){
$files = scandir($dir);
// LOOP THROUGH THE FILES AND RENAME THEM
// APPROPRIATELY...
foreach($files as $key=>$file){
$fileName = $dir . DIRECTORY_SEPARATOR . $file;
if(is_file($fileName) && !preg_match("#^\.#", $file)){
$newFileName = preg_replace("#\d{1,},\d{1,}#", "", $fileName);
rename($fileName, $newFileName);
}
}
}
renameFilesInDir($path);

Answer 3

<?php
$path = './images/';
if ($handle = opendir($path))
{
while (false !== ($fileName = readdir($handle)))
{
if($fileName!=".." && $fileName!=".")
{
//change below line and find first occurence of '-' and then replace everything before this with 'test' or any keyword
$newName = substr($fileName, 4);
$fileName = $path . $fileName;
$newName = $path . $newName;
rename($fileName, $newName);
}
}
closedir($handle);
}
?>