Mysql query to find nearest user to your current location

Following query will find records which came under 1.5 km on the basis of user current latitude and longitude

user latitude is 21.153518
user latitude is 79.045513

SELECT *
        FROM users
        WHERE ( 3959 * ACOS( COS( RADIANS( 21.153518 ) ) * COS( RADIANS( users.latitude ) ) * COS( RADIANS( users.longitude ) - RADIANS( 79.045513 ) ) + SIN( RADIANS( 21.153518) ) * SIN( RADIANS( users.latitude ) ) ) )  < 1.5


Here is some more query may be helpful to you guys :)

SELECT users. * ,ACOS( SIN( RADIANS( users.`latitude` ) ) * SIN( RADIANS( 21.153518 ) ) + COS( RADIANS( users.`longitude` ) ) * COS( RADIANS( 21.153518 ) ) * COS( RADIANS( users.`longitude` ) - RADIANS( 79.045513 ) ) ) *6380 FROM users


SELECT * , ( 3959 * ACOS( COS( RADIANS( 21.153518 ) ) * COS( RADIANS( users.latitude ) ) * COS( RADIANS( users.longitude ) - RADIANS( 79.045513 ) ) + SIN( RADIANS( 21.153518) ) * SIN( RADIANS( users.latitude ) ) ) ) AS distance
        FROM users
        ORDER BY distance