How to save same image with different names in PHP? - php

Question

I have written a function for creating a thumbnail from .jpg image. But what I want to do is whenever the function gets called, same image should be saved as 1.jpg,2.jpg,3.jpg at the same destination.
I have used Sessions and static variable concept but to no success.
Here is my code.
this is thumbsave.php file
<?php
session_start();
$_SESSION['sid']=$k=1;
function createThumb($fpath)//fpath will be passed here as parameter.
{
$ims = imagecreatefromjpeg($fpath);
$imd = imagecreatetruecolor(100, 100);
imagecopyresized($imd, $ims, 0, 0, 0, 0, 100, 100, imagesx($ims),
imagesy($ims));
imagejpeg($imd,"saveimages/" . $_SESSION['sid'] . ".jpg");
$_SESSION['sid'] = $_SESSION['sid'] + 1;
imagedestroy($ims);
imagedestroy($imd);
echo "Thumbnail Created and Saved at the Destination";
}
?>
Here is my code for dynamicthumb.php
<?php
include("include/thumbsave.php");
createThumb("imgs/m1.jpeg");
?>
So,when I run the dynamicthumb.php file the image stored at the imgs folder must be stored inside saveimages folder. But here only 1 image is saved, not multiple copies are generated like 2.jpg,3.jpg.

Answer 1

You can use a file_exists loop if you are positive the name of the thumbnail will always be numerical:
function createThumb($fpath)
{
$ims = imagecreatefromjpeg($fpath);
$imd = imagecreatetruecolor(100, 100);
imagecopyresized($imd, $ims, 0, 0, 0, 0, 100, 100, imagesx($ims), imagesy($ims));
$thumb = 1;
while ( file_exists('saveimages/'. $thumb .'.jpg') ) { $thumb++; }
imagejpeg($imd,'saveimages/'. $thumb .'.jpg');
imagedestroy($ims);
imagedestroy($imd);
echo 'Thumbnail Created and Saved at the Destination as '. $thumb .'.jpg';
}
However I question the logic behind what you are asking for... as this suggests that every thumbnail you create will just be a sequential number, all stored in the same directory?
You may have better luck using a counter db field or file, as doing file_exists on a folder with thousands and growing, can hurt performance.
So a file based counter solution could be thus:
function createThumb($fpath)
{
$ims = imagecreatefromjpeg($fpath);
$imd = imagecreatetruecolor(100, 100);
imagecopyresized($imd, $ims, 0, 0, 0, 0, 100, 100, imagesx($ims), imagesy($ims));
$thumb = file_get_contents('saveimages/thumbcount.txt');
$thumb++; file_put_contents('saveimages/thumbcount.txt',$thumb);
imagejpeg($imd,'saveimages/'. $thumb .'.jpg');
imagedestroy($ims);
imagedestroy($imd);
echo 'Thumbnail Created and Saved at the Destination as '. $thumb .'.jpg';
}
Just be sure to prime the thumbcount.txt with a 1 so it has something to begin with.

Answer 2

This is the line responsible for saving image to file:
imagejpeg($imd,"saveimages/" . $_SESSION['sid'] . ".jpg");
You can update it to use $fpath instead of ,$_SESSION['sid']:
imagejpeg($imd, $fpath);
But beware, your path should end with .jpg.