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<?php $a = [1,2,3,4]; foreach($a as &$num) {} echo implode(',',$a).PHP_EOL; // 1,2,3 var_dump($a); foreach($a as $num) {echo $num;} var_dump($num); var_dump($a); echo implode(',',$a).PHP_EOL; // 1,2,2
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.30 - 7.3.0rc3
1,2,3,4 array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> &int(4) } 1233int(3) array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> &int(3) } 1,2,3,3