PHP Manual: NOP

NOP


<?php
/*
 * no operation
 * opcode number: 0
 */
function A(){}; 
?>

Function name: (null)

Compiled variables: none

line	#	op	fetch	ext	return	operands
6	0	NOP
7	1	RETURN				1

Function name: A

Compiled variables: none

line	#	op	fetch	ext	return	operands
6	0	RETURN				null