This should work with $photo="/images/search/image1.jpg"]

<img src="<?= $photo ?>" alt="h" width="200" height="132" />

is it correct to save urls in mysql tables or php vars ?

It's according to what you are going to do with the photos.

If your uploading them, I would have the directory containing the images as a variable and put the name of the image in the database. Not the full path.

is it correct to save urls in mysql tables or php vars ? slashes can be saved ?

for a table field entry the value below is correct ?

"/images/search/image1.jpg"

yes ..