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<?php function test($var) { $GLOBALS['a']++; //$var++; debug_zval_dump($var); //$GLOBALS['var']++; echo $var; echo $GLOBALS['a']; // echo $GLOBALS['var']; } $a = 0; $GLOBALS['a']++; debug_zval_dump($a); test($a);
Output for 7.0.0 - 7.1.0
int(1) int(1) 12
Output for 4.3.0 - 5.6.28
long(1) refcount(2) long(1) refcount(3) 12