The complexity of an expression is defined by the number of &&, || and condition ? ifTrue : ifFalse
operators it contains.
A single expression’s complexity should not become too high to keep the code readable.
Noncompliant code example
With the default threshold value of 3
if ((($condition1 && $condition2) || ($condition3 && $condition4)) && $condition5) { ... }
Compliant solution
if ( (my_first_condition() || my_second_condition()) && my_last_condition()) { ... }
