3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('<1970'); $b = range(1970, 1996); $c = array_merge($a, $b); print_r($c); ?>
Output for 5.4.8 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => <1970 [1] => 1970 [2] => 1971 [3] => 1972 [4] => 1973 [5] => 1974 [6] => 1975 [7] => 1976 [8] => 1977 [9] => 1978 [10] => 1979 [11] => 1980 [12] => 1981 [13] => 1982 [14] => 1983 [15] => 1984 [16] => 1985 [17] => 1986 [18] => 1987 [19] => 1988 [20] => 1989 [21] => 1990 [22] => 1991 [23] => 1992 [24] => 1993 [25] => 1994 [26] => 1995 [27] => 1996 )

preferences:
159.95 ms | 405 KiB | 220 Q