If file exist in the path, rename it

rename_file_if_exists.php

<?php
/**
* Create a better name for file
* @param mixed $context
* @return type $new_text
*/
function rename_file($context) {
$context = trim($context);
$search = array('Ç','ç','Ğ','ğ','ı','İ','Ö','ö','Ş','ş','Ü','ü',' ');
$replace = array('c','c','g','g','i','i','o','o','s','s','u','u','-');
$new_text = str_replace($search,$replace,$context);
return strtolower($new_text);
}  


/**
 * If file exists in there append number.  // filename_0.jpg
 * @param type $path
 * @param type $filename
 * @link http://css-tricks.com/snippets/php/check-if-file-exists-append-number-to-name/
 * @return strıng
 */
function rename_exists_file($path, $filename){
    if ($pos = strrpos($filename, '.')) {
           $name = substr($filename, 0, $pos);
           $ext = substr($filename, $pos);
    } else {
           $name = $filename;
    }

    $newpath = $path.'/'.$filename;
    $newname = $filename;
    $counter = 0;
    while (file_exists($newpath)) {
           $newname = $name .'_'. $counter . $ext;
           $newpath = $path.'/'.$newname;
           $counter++;
     }

    return $newpath;
}