3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ 'foo', 'bar', 'bazz' ]; $b = $a; foreach ( $a as &$value ) { var_dump( current( $a ) ); }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(3) "foo" string(3) "foo" string(3) "foo"
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.30
string(3) "bar" string(4) "bazz" bool(false)

preferences:
171.02 ms | 401 KiB | 238 Q