How can i add a number to a file name in php - php

Question

Goodevening to everyone, how can i add a number to a file name in php.
Let me explain; I want to save a file using a dropzone but i want to rename the file if it exist in the folder.
I've written down this code but the regex doesn't work and also if it's possible to insert the number before the extension of the file like google chrome does.
if(file_exists($target_file)){
if(preg_match_all($target_file, "'('[0-9]{1,}')'")==false){
$target_file= $target_path."(1)".$name;
}else{
$pos=preg_match_all($target_file, "'('[0-9]{1,}')'");
$pos=$pos++;
$pos1=strpos($pos, $target_file, ")");
$pos1=$pos1-$pos;
$num=substr($target_file, $pos, $pos1);
$num = (int)$num;
$num =$num++;
$sostituisci="(".$num.")";
$target_file=preg_replace("'('[0-9]{1,}')'", $sostituisci, $target_file);
}
}
$name is the name of the file i want to save with the extension
the first $target_file of the code contain the full path + the name of the file
$target_file is a sting like /dropzone/upload/filename.txt and $name is a string like filename.txt. If the $targetfile exist i would to rename the $name like filename(1).txt or filename(2).txt and so on
also other solutions are accepted like a js library.

Answer 1

I assume you are referring to this set of code here.
if(preg_match_all($target_file, "'('[0-9]{1,}')'")==false){
$target_file= $target_path."(1)".$name;
}
insert the number before the extension of the file
EDIT: Use explode() and re-format the ext.
EXAMPLE:
$target_path = "/assets/imgages/";
$name = 'img.jpg';
$name = explode('.', $name);
$format = $name[0].'(1).'.$name[1];
$path = $target_path.$format;
Will produce the following string:
/assets/img/notes(1).txt
Accept multiple dots in string.
$filename = 'company.jobtitle.field.text';
function formatDuplicateExtension($filename){
$stmt = NULL;
$format = explode('.', $filename);
$i = 0;
foreach($format as $key => $value){
if($value === end($format)){
$stmt .= '(1).'.$format[$i];
}elseif($key === count($format)-2){
$stmt .= $format[$i];
}else{
$stmt .= $format[$i].'.';
}
$i++;
}
return $stmt;
}
echo formatDuplicateExtension($filename);
$filename = 'company.jobtitle.field.text';
OUTPUTS: //-->/assets/imgages/company.jobtitle.field(1).text
$name = 'trees.vac2012.img.jpg';
OUTPUTS: //--> /assets/imgages/trees.vac2012.img(1).jpg

Answer 2

I've found a solution idk if it's the best one because regex searches and substitutions are involved a lot of times and it seems to be they're resources consuming functions.
//this function insert the $number in the name of the file before .extension
function InsertBeforeExtension($filename,$number){
$stmt = NULL;
$format = explode('.', $filename);
$i = 0;
foreach($format as $key => $value){
if($value === end($format)){
$stmt .= '('.$number.').'.$format[$i];
}elseif($key === count($format)-2){
$stmt .= $format[$i];
}else{
$stmt .= $format[$i].'.';
}
$i++;
}
return $stmt;
}
//this function check if there's a string like (number).ext in the name
//if yes increment the (number) in the string that become (number++).ext
//if no insert (1) before .ext
function insertnumber($string){
$matches=array();
$re = '/[(][0-9]+[)]\.[a-zA-Z]+/m';
preg_match_all($re, $string, $matches, PREG_SET_ORDER, 0);
if($matches[0][0]){
//if (number).ext is present
$re = '/[(][0-9]+[)]/m';
$str = $matches[0][0];
//select the (number) only
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
//remove parethesis
$str=substr($matches[0][0],1,-1);
//cast sting to an int for add a number
$int = (int)$str;
$int++;
//replace the last (number) match in the name of the file with (number++)
$re = '/(.*)[(][0-9]+[)]/m';
$subst = '${1}('.$int.')';
$result = preg_replace($re, $subst, $string);
}else{
//if (number).ext is not present insert (1) before .ext
$result=InsertBeforeExtension($string,1);
}
return $result;
};
$target_file = $target_path.$name;
//If the file exist repeat to find the number of file that doesn't exist
if( file_exists( $target_file )) {
while(file_exists( $target_file )){
$name=insertnumber($name);
$target_file = $target_path.$name;
}
}
The only problem is that if you have uploaded a file named like file(3).txt and you upload another file with the same name this function rename it in file(4).txt and not in file(3)(1).txt but for my scope this is not important
I've commented the code trying to be the most clear possible this solution seems to work well but i've not calculate the performance.