PHP 5.6 и PHP 7 на русском: FETCH

FETCH_IS

PHP code


<?php
/*
 * Fetch the value from variable which is to be used to test if it is set or not, through isset()/isempty().
 * opcode number: 89
 */
echo isset($_SESSION['userid']);
echo isset($_SESSION['userid'][1]);
echo isset($_SESSION->prop->prop);
?>

PHP opcodes

Function name: (null)

Compiled variables: none

line	#	op	ext	return	operands
6	0	FETCH_IS		$0	'_SESSION'
	1	ZEND_ISSET_ISEMPTY_DIM_OBJ	1	~1	$0,'userid'
	2	ECHO			~1
7	3	FETCH_IS		$2	'_SESSION'
	4	FETCH_DIM_IS		$3	$2,'userid'
	5	ZEND_ISSET_ISEMPTY_DIM_OBJ	1	~4	$3,1
	6	ECHO			~4
8	7	FETCH_IS		$5	'_SESSION'
	8	FETCH_OBJ_IS		$6	$5,'prop'
	9	ZEND_ISSET_ISEMPTY_PROP_OBJ		~7	$6,'prop'
	10	ECHO			~7
9	11	RETURN			1