Multiple samplers for one texture array - opengl

Question

How can I create multiple samplers for one texture array?
So far I have relied upon OpenGL figuring out that the declared uniform sampler2Darray txa sampler refers to the texture array I bound with glBindTexture.
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA8, width, height,
layerCount, 0 GL_RGBA, GL_UNSIGNED_BYTE, texture_array);
...
glGenTextures(1,&texture_ID);
glBindTexture(GL_TEXTURE_2D_ARRAY, texture_ID);
...
//fragment shader
uniform sampler2Darray txa
...
vec2 tc;
tc.x = (1.0f - tex_coord.x) * tex_quad[0] + tex_coord.x * tex_quad[1];
tc.y = (1.0f - tex_coord.y) * tex_quad[2] + tex_coord.y * tex_quad[3];
vec4 sampled_color = texture(txa, vec3(tc, tex_id));
I tried specifying two samplers in the fragment shader but I get a compilation error for the fragment shader:
uniform sampler2DArray txa;
uniform sampler2DArray txa2;
...
vec4 texture = texture(txa, vec3(tc, tex_id));
vec4 texture2 = texture(txa2, vec3(tc2, tex_id));
I didn't expect this to work, however, I am not sure that the fragment shader compilator checks whether samplers are assigned textures, so maybe something else is wrong.
I tried generating and binding the sampler objects but I still get a fragment shader error:
GLuint sampler_IDs[2];
glGenSamplers(2,sampler_IDs);
glBindSampler(texture_ID, sampler_IDs[0]);
glBindSampler(texture_ID, sampler_IDs[1]);
I would like to stick to lower versions of OpenGL, is it possible? Any help is appreciated, thank you!

Answer 1

The error is cause by the line
vec4 texture = texture(txa, vec3(tc, tex_id));
Then name of the variable texture is equal the name of the built-in function texture. The variable is declared in local scope, so in this scope texture is a variable and calling the function texture causes an error.
Rename the variable to solve the issue. e.g.:
vec4 texture1 = texture(txa, vec3(tc, tex_id));