Php/docs/internals2.opcodes.pre-dec-obj

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PRE_DEC_OBJ

PHP code

<?php/* *  * opcode number: 133 */$obj = new A();--$obj->num;?>

PHP opcodes

Function name: (null)

Compiled variables: !0=$obj

line # op fetch ext return operands
6 0 ZEND_FETCH_CLASS     :0 'A'
  1 NEW     $1 :0
  2 DO_FCALL_BY_NAME   0    
  3 ASSIGN       !0,$1
7 4 ZEND_PRE_DEC_OBJ       !0,'num'
8 5 RETURN       1