I am using WordPress and woocommerce which using PHP on a shared server (hosted server). I have a ton of pictures I am working on, to make the names more descriptive and to add SEO IPTC info to each picture. My question is primarily about PHP best practices when it comes to names--to use with or without spaces. Example?
Blaze-1-Fancy-Leaf-Caladium-Bulbs.jpg ("-" between each word)
or Blaze_1_Fancy_Leaf_Caladium_Bulbs.jpg ("_" between each word)
or simply Blaze 1 Fancy Leaf Caladium Bulbs.jpg (" " between each word)
Then secondarily and much less important any recommendations for apps to mass rename pictures, adding SEO IPTC info and adding watermarks to pictures?