PHP Pocket Reference, 2nd Edition (2009)

Operators

Expressions are combined and manipulated using operators. The following table lists the operators from highest to lowest precedence; the second column (A) shows the operators' associativity. These operators should be familiar to you if you have any C, Java, or Perl experience.

Operators	A
!, ~, ++, --, @, (the casting operators)	Right
*, /, %	Left
+, -, .	Left
<<, >>	Left
<, <=, >=, >	Nonassociative
==, !=, ===, !==	Nonassociative
&	Left
^	Left
\|	Left
&&	Left
\|\|	Left
? : (conditional operator)	Left
=, +=, -=, *=, /=, %=, ^=, .=, &=, \|=, <<=, >>=	Left
AND	Left
XOR	Left
OR	Left

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