Can I retrieve the image created with imagepng() after resizing it before storing it in the folder

Question

I have a code that will resize the image to a specific size and store it in a specific folder. until here everything is working fine. Can I retrieve the image created after resizing it before storing it in the folder, in order to add a watermark to it.. in order to reduce resources as you know... but My code is giving me an error: **

imagecreatefrompng(1): failed to open stream

**

this my code :

    // resizing code 
     .... 

    $result = imagepng($dst_img);
    

    // i get error : imagecreatefrompng(1): failed to open stream
    $im = imagecreatefrompng($result);
    
        
    $sx = imagesx($im); //get Our PNG Width
    $sy = imagesy($im); //get Our PNG Height


    ......