Opcode Descriptions and Examples
PHP Manual

BOOL_XOR

PHP code

<?php
/*
 * Boolean (logical) xor of value1
 * opcode number: 14
 */
echo xor 2;
?>

PHP opcodes

Function name: (null)

Compiled variables: none

line#op fetchextreturn operands
60 BOOL_XOR   ~0 1,2
 1 ECHO     ~0
72 RETURN     1

Opcode Descriptions and Examples
PHP Manual