array command

Both Illustrator and InDesign are better suited to this than Photoshop.

Although an action could record the generation of a fixed array, this would be best accomplished with a script.

What type of array? A rectangular horizontal and/or vertical grid? A polar array where the rotation point may create say the hour positions on a clockface (30°)?

How would you like the image aligned. Images can have any aspect ratio and be any size.  Documents have a canvas that also has an aspect ratio and size.  What you ask for is more complicated then flowing proportional text where font and font size may change with the next character.  The scattering  of different aspect ratio and size images on a canvas would most likely not be appealing. Even if Photoshop expanded the documents canvas Photoshop still has limits, I believe the max canvas size Photoshop will support is 300,000px by 300,000px with up to 8,000 layers. 

A Photoshop Script can resize and layout images on a canvas. Adobe installs Contact Sheets II script you can use in Photoshop to distribute your images on canvases and you can download my toolkit and tile images on a canvas with my Place Image Roll script. That will resize your image to fill a common tile size and mask them to the tile.   The Script will calculate the Canvas size required for tiling the image including the inter tiling space and canvas borders.

"automatically place at a certain distance from each other."

By @maryam5FA5

Hi 

Illustrator has what I think you are looking for in the Distribute Spacing section of the Align panel where you can type in the amout for vertical or horizontal spacing.

Photoshop does not.

You have to make one object a Key Object first in Illustrator, and Photoshop does not support Key Objects.

This may help you when you make your feature request to Adobe.

~ Jane

If distribute, or distribute spacing, do not do what you want, then you can raise a feature requests at the link below , where it will be seen by Adobe staff.
https://feedback.photoshop.com/photoshop_family

Dave

Hi

Feature requerst can be made on the Adobe Feedback Forum