A rectangular loop carrying a current i₁, is situated near a long straight wire carrying a steady current i₂. The wire is parallel to one of the sides of the loop and is in the plane of the loop as shown in the figure. Then the current loop will

Force on the edges parallel to the straight wire will be attractive if currents are parallel and repulsive if currents are antiparallel. Force on the edges perpendicular to the straight wire will be zero.

The side which is closer to the wire will experience larger force than the side which is away. 

So, net force on the loop will be attractive.