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<?php print_r(range('A', 'z'));
Output for 4.3.0 - 7.1.0
Array ( [0] => A [1] => B [2] => C [3] => D [4] => E [5] => F [6] => G [7] => H [8] => I [9] => J [10] => K [11] => L [12] => M [13] => N [14] => O [15] => P [16] => Q [17] => R [18] => S [19] => T [20] => U [21] => V [22] => W [23] => X [24] => Y [25] => Z [26] => [ [27] => \ [28] => ] [29] => ^ [30] => _ [31] => ` [32] => a [33] => b [34] => c [35] => d [36] => e [37] => f [38] => g [39] => h [40] => i [41] => j [42] => k [43] => l [44] => m [45] => n [46] => o [47] => p [48] => q [49] => r [50] => s [51] => t [52] => u [53] => v [54] => w [55] => x [56] => y [57] => z )