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<?php function fibo( &$a, &$b ) { $a = &$b; $b = 3; } $a = 1; $b = 2; Fibo( $a, $b ); var_dump( $a, $b );
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(1) int(3)