saving cropped images in unique name? - php

Question

This script helps me crop and save images. every time i save an image it saves has crop.jpg .. can i save it in a different name? i have an input field with image name.. "$_POST['imgname']" how can i use this has image name for the cropped image?
<?php
$canvasImg = $_POST['img'];
$data = base64_decode($canvasImg);
$File = "captured.jpg";
$Handle = fopen($File, 'w');
fwrite($Handle, $data);
fclose($Handle);
$src_image = imagecreatefrompng($File);
$width = imagesx($src_image);
$height = imagesy($src_image);
$dst_x = 0;
$dst_y = 0;
$src_x = $width*0.350; // Crop Start X
$src_y = $height*0.165; // Crop Srart Y
$dst_w = $width*0.294; // Thumb width
$dst_h = $height*0.470; // Thumb height
$src_w = $dst_w; // $src_x + $dst_w
$src_h = $dst_h; // $src_y + $dst_h
$image = imagecreatetruecolor($dst_w, $dst_h);
imagealphablending($image, false);
$col=imagecolorallocatealpha($image,255,255,255,127);
imagefilledrectangle($image,0,0,$dst_w, $dst_h,$col);
imagealphablending($image,true);
imagecopyresampled($image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
imagealphablending($image,true);
imagealphablending($image,false);
imagesavealpha($image,true);
imagepng($image, "images/crop.jpeg");
imagedestroy($image);
?>

Answer 1

If I understand your question correctly, you just need to make a new filename for the imagepng() to use.
This would seem a simple solution:
$canvasImg = $_POST['img'];
$data = base64_decode($canvasImg);
$File = "captured.jpg";
...
// create a new filesname for the cropped image in $save_to
$save_to = 'images/';
$save_to .= str_replace(array('.jpg','.png'), '', $data ) // remove original extension if it existed
$save_to .= '_crop.jpg';
// use this new name to save the cropped image
imagepng($image, $save_to);
However your code does not seem to make much sence. You accept an image name in $_POST['img'] then save it to a file called capured.jpg and then open it as a .png in $src_image = imagecreatefrompng($File);
I assume you must only be accepting .png files, and in that case why save it as a .jpg.
See what I mean, there appears to be a whole lot of confusion in your code.