Templates

[.m.]

below guidance could be helpful
* MyBB Plugins Explained
* Plugin MyBB Base & Plugin MySql

templates system is used to display required content easily. see templates related guidance

for adding a button to thread page we have to modify showthread related template(s)

---

breadcrumb is used for easy navigation of the web site / forum
eg. MyBB Community Forums › Resources › Plugins › Plugin Development

---

see MyBB variables - php cross reference

---

eval('$sections  = "' . $templates->get('hello_world_template') . '";'); 

in simple words, variable sections value is evaluated through hello_world_template