Bulk update in php using some conditions for filename - php

Question

I have a folder and have multiple files over there. The file has the below pattern for example.
The file names should be renamed from
file1.mp4.png
file2.flv.png
file3.xxx.png (xxx - can be anything)
to as follows (the last extension remains).
file1.png
file2.png
file3.png
Files having non-png extension should be left untouched.
I am using the logic mentioned in Bulk Rename Files in a Folder - PHP
$handle = opendir("path to directory");
if ($handle) {
while (false !== ($fileName = readdir($handle))) {
$newName = (how to get new filename) // I am struck here
rename($fileName, $newName);
}
closedir($handle);
}
How best I can do this to do a bulk update?

Answer 1

<?php
// Select all PNG Files
$matches = glob("*.[pP][nN][gG]");
// check if we found any results
if ( is_array ( $matches ) ) {
// loop through all files
foreach ( $matches as $filename) {
// rename your files here
$newfilename = current(explode(".", $filename)).".png";
rename($filename, $newfilename);
echo "$filename -> $newfilename";
}
}
?>

Answer 2

try this
$handle = opendir("path to directory");
if ($handle) {
while (false !== ($fileName = readdir($handle))) {
$arr_names = explode(".", $fileName);
$size = sizeof($arr_names);
$ext = $arr_names[$size-1];
if($fileName=="." || $fileName==".." || is_dir($fileName))
{
continue; // skip png
}
if($ext=='png' || $ext=='PNG')
{
$newName = $arr_names[0].".".$ext;
rename($fileName, $newName);
}
}
closedir($handle);
}

Answer 3

Shortest using regex
$handle = opendir("path to directory");
if ($handle) {
while (false !== ($fileName = readdir($handle))) {
$newName = preg_replace("/\.(.*?)\.png$/", '', $fileName); // removes .xxx.png
rename($fileName, ($newName . '.png')); // renames file1.png
}
closedir($handle);
}