Disabling map drag and zoom in OpenLayers 3?

I didn't try this code but I hope it does the work :

var Interactions=yourMap.getInteractions();
for(var interaction in Interactions){
    yourMap.removeInteraction(interaction);
}

this is for OL3

Edits :

when declaring the map, set the interactions to false within its attributes :

interactions: ol.interaction.defaults({
    doubleClickZoom :false,
    dragAndDrop: false,
    keyboardPan: false,
    keyboardZoom: false,
    mouseWheelZoom: false,
    pointer: false,
    select: false
}),

and then using the method

ol.interaction.setActive(true);

you can re-enable them again, somehow setActive(false) didn't work for me, so here is a work around if it suits your needs

If you don't want any interactions, just put interactions:null into your map constructor like that :

var map = new ol.Map({
   interaction:null
});

If you don't want zoom buttons and info button, just put controls: null into your map constructor again

var map = new ol.Map({
   interaction: null,
   control: null
});

There you go : a working fiddle for example

Shamelessly copied from another answer. Do this for each interaction type (MouseWheelZoom, PinchZoom, etc.)

var dblClickInteraction;
// find DoubleClickZoom interaction
map.getInteractions().getArray().forEach(function(interaction) {
  if (interaction instanceof ol.interaction.DoubleClickZoom) {
    dblClickInteraction = interaction;
  }
});
// remove from map
map.removeInteraction(dblClickInteraction);

Openlayers 5

var map = new ol.Map({
  ...
  controls: [],
  interactions: []
});

map.getInteractions().forEach(x => x.setActive(false));

Works also with setActive(true) to re-enable interactions.