How do I detect players being on a block without pressure plates or tripwires? [duplicate]

Question

How do I detect players being on a block without pressure plates or tripwires? Preferably with command blocks. This is on Minecraft: Java Edition.

Answer 1

Depends on the version.

1.12 or older use:/execute @a ~ ~ ~ detect ~ ~-1 ~ minecraft:stone 0 /say hi

1.13 or newer use:execute as @a at @s if block ~ ~-1 ~ minecraft:stone 0 run say hi