Issue with a platformer

[Half]

This is a code that I got from a youtube video (the step event of obj_player, which is the controllable character):

/// platform physics



// Check for ground
if (place_meeting(x, y+1, obj_solid)) {
    vspd = 0;
   
    //Jumping
    if (keyboard_check(vk_up)) {
        vspd = -jspd
} 
} else {
    //gravity
    if (vspd < 10) {
        vspd += grav;
    }
}

// Moving right
if (keyboard_check(vk_right)) {
    hspd = spd;
}

// Moving left
if (keyboard_check(vk_left)) {
    hspd = -spd;
}

// Check for not moving
if ((!keyboard_check(vk_right)) && !keyboard_check(vk_left) || !keyboard_check(vk_right) && !keyboard_check(vk_left)) {
    hspd = 0;
}

// Horizontal collisions
if (place_meeting(x+hspd, y, obj_solid)) {
    while (!place_meeting(x+sign(hspd), y, obj_solid)) {
        x+= sign (hspd);
    }
    hspd = 0;
}

//Move horizontally
x += hspd; 

// Vertical collisions
if (place_meeting(x+hspd, y+vspd, obj_solid)) {
    while (!place_meeting(x, y+sign(vspd), obj_solid)) {
        y+= sign (vspd);
    }
    vspd = 0;
}

//Move vertically
y += vspd;

I have a controllable character that can jump around and land on platforms, but when it touches the side of a platform the character freezes in the air and the game crashes.

Is there something that is missing from the code?

 

[FrostyCat]

I'm certain you didn't get this from the video:

if (place_meeting(x+hspd, y+vspd, obj_solid)) {
    while (!place_meeting(x, y+sign(vspd), obj_solid)) {
       y+= sign (vspd);
   }
   vspd = 0;
}

If you genuinely understand what this piece of code is for, you should easily see why the +hspd has no business being in that position.

Don't just copy code off a video and think you're done, walk through the code yourself and prove it yourself. Otherwise you aren't learning.

 

[Half]

Thank you. I'll take your advice on learning what it means as well.