1--TEST-- 2SCCP 016: Used constant instructions should be replaced with QM_ASSIGN 3--INI-- 4opcache.enable=1 5opcache.enable_cli=1 6opcache.optimization_level=-1 7opcache.opt_debug_level=0x20000 8opcache.preload= 9--EXTENSIONS-- 10opcache 11--FILE-- 12<?php 13return isset($undef) || php_sapi_name() == php_sapi_name(); 14?> 15--EXPECTF-- 16$_main: 17 ; (lines=4, args=0, vars=1, tmps=1) 18 ; (after optimizer) 19 ; %ssccp_016.php:1-4 200000 T1 = ISSET_ISEMPTY_CV (isset) CV0($undef) 210001 T1 = JMPNZ_EX T1 0003 220002 T1 = QM_ASSIGN bool(true) 230003 RETURN T1 24