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<?php function test1($unset = false) { static $bar = 'test1'; echo $bar; if ($unset) { unset($bar); } } function test2($unset = false) { global $bar; if (!isset($bar)) { $bar = 'test2'; } echo $bar; if ($unset) { unset($bar); } } test1(); test1(); test1(true); test1(); echo "\n"; test2(); test2(); test2(true); test2();
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
test1test1test1test1 test2test2test2test2