What does ".=" mean in PHP?
15994
Reference — What does this symbol mean in PHP?
111655
What is the difference between single-quoted and double-quoted strings in PHP?
1469
Is there a difference between "==" and "is"?
14092
How does "do something OR DIE()" work in PHP?
38430
In PHP, what does the ${$ } syntax do?
25451
What's the difference between :: (double colon) and -> (arrow) in PHP?
69801
What does it mean when ST_Equals returns false and `=` returns true?
101128
What is "?:" notation in JavaScript?
36005
What does 'var that = this;' mean in JavaScript?
56105
Problems executing a condition in php
152763
php == vs === operator
4772
Difference between "not equal" operators  and != in PHP
130399
What is the difference between  and !=
11651
What does curly brackets in the `var { ... } = ...` statements do?
37909
Understanding nested PHP ternary operator
85438
In PHP, what is a closure and why does it use the "use" identifier?
7250
Reference - What does this error mean in PHP?