php保存带有特定文件名的图像，不会互相覆盖

Question

I hope someone can help me with this php code. At the moment its just saving an image with the file name "img.png" to the server but with every time a new canvas screenshot is taken the image is just overwritten.

My aim is to create a new unique (like numbered chronological by time taken) file name for the images with every new screenshot and save it on the server.

Here the php code so far:

$data = $_REQUEST['base64data']; 
echo $data;

$image = explode('base64,',$data); 

file_put_contents('img.png', base64_decode($image[1])); 

Thank you. regards

Answer 1

Try

$filename = 'img_'.date('Y-m-d-H-s').'.png';
file_put_contents($filename, base64_decode($image[1]));

This will save your file with a filename containing the current date and time, e.g.

img_2013-09-19-21-50.png