## mark a section (Learn more)

These are the characters that are matched by \w in PCRE v7.8 (regardless of whether you use the u modifier): Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 [6] => 6 [7] => 7 [8] => 8 [9] => 9 [10] => A [11] => B [12] => C [13] => D [14] => E [15] => F [16] => G [17] => H [18] => I [19] => J [20] => K [21] => L [22] => M [23] => N [24] => O [25] => P [26] => Q [27] => R [28] => S [29] => T [30] => U [31] => V [32] => W [33] => X [34] => Y [35] => Z [36] => _ [37] => a [38] => b [39] => c [40] => d [41] => e [42] => f [43] => g [44] => h [45] => i [46] => j [47] => k [48] => l [49] => m [50] => n [51] => o [52] => p [53] => q [54] => r [55] => s [56] => t [57] => u [58] => v [59] => w [60] => x [61] => y [62] => z [63] => ª [64] => µ [65] => º [66] => À [67] => Á [68] => Â [69] => Ã [70] => Ä [71] => Å [72] => Æ [73] => Ç [74] => È [75] => É [76] => Ê [77] => Ë [78] => Ì [79] => Í [80] => Î [81] => Ï [82] => Ð [83] => Ñ [84] => Ò [85] => Ó [86] => Ô [87] => Õ [88] => Ö [89] => Ø [90] => Ù [91] => Ú [92] => Û [93] => Ü [94] => Ý [95] => Þ [96] => ß [97] => à [98] => á [99] => â [100] => ã [101] => ä [102] => å [103] => æ [104] => ç [105] => è [106] => é [107] => ê [108] => ë [109] => ì [110] => í [111] => î [112] => ï [113] => ð [114] => ñ [115] => ò [116] => ó [117] => ô [118] => õ [119] => ö [120] => ø [121] => ù [122] => ú [123] => û [124] => ü [125] => ý [126] => þ [127] => ÿ )

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