PHP: Operator Precedence

The following table lists the operators in order of precedence, with the highest-precedence ones at the top. Operators on the same line have equal precedence, in which case associativity decides grouping.

Operator Precedence

Associativity	Operators	Additional Information
non-associative	clone new	clone and new
left	[	array()
right	****	arithmetic
right	++ -- ~ (int) (float) (string) (array) (object) (bool) @	types and [increment/decrement] (http://php.net/manual/en/language.operators.increment.php)
non-associative	instanceof	types
right	!	logical
left	*** / %	arithmetic
left	+ - .	arithmetic and string
left	<< >>	bitwise
non-associative	< <= > >=	comparison
non-associative	== != === !== <> <=>	comparison
left	&	bitwise and references
left	^	bitwise
left	/	bitwise
left	&&	logical
left	//	logical
right	??	comparison
left	? :	ternary
right	= += -= *= **= /= .= %= &= /= ^= <<= >>=	assignment
left	and	logical
left	xor	logical
left	or	logical