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<?php $values = array_merge(range(65, 90), range(97, 122), range(48, 57)); var_dump($values);
Output for 4.3.0 - 7.1.0
array(62) { [0]=> int(65) [1]=> int(66) [2]=> int(67) [3]=> int(68) [4]=> int(69) [5]=> int(70) [6]=> int(71) [7]=> int(72) [8]=> int(73) [9]=> int(74) [10]=> int(75) [11]=> int(76) [12]=> int(77) [13]=> int(78) [14]=> int(79) [15]=> int(80) [16]=> int(81) [17]=> int(82) [18]=> int(83) [19]=> int(84) [20]=> int(85) [21]=> int(86) [22]=> int(87) [23]=> int(88) [24]=> int(89) [25]=> int(90) [26]=> int(97) [27]=> int(98) [28]=> int(99) [29]=> int(100) [30]=> int(101) [31]=> int(102) [32]=> int(103) [33]=> int(104) [34]=> int(105) [35]=> int(106) [36]=> int(107) [37]=> int(108) [38]=> int(109) [39]=> int(110) [40]=> int(111) [41]=> int(112) [42]=> int(113) [43]=> int(114) [44]=> int(115) [45]=> int(116) [46]=> int(117) [47]=> int(118) [48]=> int(119) [49]=> int(120) [50]=> int(121) [51]=> int(122) [52]=> int(48) [53]=> int(49) [54]=> int(50) [55]=> int(51) [56]=> int(52) [57]=> int(53) [58]=> int(54) [59]=> int(55) [60]=> int(56) [61]=> int(57) }