Why is this an issue?

The use of increment and decrement operators in method calls or in combination with other arithmetic operators is not recommended, because:

• It can significantly impair the readability of the code.
• It introduces additional side effects into a statement, with the potential for undefined behavior.
• It is safer to use these operators in isolation from any other arithmetic operators.

Noncompliant code example

$u8a = ++$u8b + $u8c--;
$foo = $bar++ / 4;

Compliant solution

The following sequence is clearer and therefore safer:

++$u8b;
$u8a = $u8b + $u8c;
$u8c--;
$foo = $bar / 4;
$bar++;