Proper way of PHP multiple conditions without getting "Undefined variable"
7250
Reference - What does this error mean in PHP?
88588
php $_GET and undefined index
81578
How do you create optional arguments in php?
19448
How do I use the ternary operator ( ? : ) in PHP as a shorthand for "if / else"?
96779
PHP: exceptions vs errors?
110513
Using the ternary operator for multiple operations
2317
How do I pass variables and data from PHP to JavaScript?
6971
boolean variable values in PHP to javascript implementation
90853
How can I compare multiple variables to a single condition?
122021
PHP Function with Optional Parameters
153616
Efficient way to look up value based on a key in php
63372
see if a variable equals any other variables in a list php
37909
Understanding nested PHP ternary operator
56105
Problems executing a condition in php
153624
What's the difference between is_null($var) and ($var === null)?
100563
PHP: Right way to declare variable before use in loop
29593
What is the "->" PHP operator called?