Validating special characters

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Here we create a Reg Exp pattern and use the match to validate it.

validating special characters-31

validating special characters-46

From numbers we’ll move to alphabets first an example for validation lowercase alphabets and then to validate both uppercase and lowercase.34 22 " 35 23 # 36 24 $ 37 25 % 38 26 & 39 27 ' 40 28 ( 41 29 ) 42 2A * 43 2B 44 2C ´ 45 2D - 46 2E - 47 2F / 48 30 0 49 31 1 50 32 2 51 33 3 52 34 4 53 35 5 54 36 6 55 37 7 56 38 8 57 39 9 58 3A : 59 3B ; 60 3C 63 3F ?64 40 @ 65 41 A 66 42 B 67 43 C 68 44 D 69 45 E 70 46 F 71 47 G 72 48 H 73 49 I 74 4A J 75 4B K 76 4C L 77 4D M 78 4E N 79 4F O 80 50 P 81 51 Q 82 52 R 83 53 S 84 54 T 85 55 U 86 56 V 87 57 W 88 58 X 89 59 Y 90 5A Z 91 5B [ 92 5C \ 93 5D ] 94 5E ^ 95 5F _ 96 60 ` 97 61 a 98 62 b 99 63 c 100 64 d 101 65 e 102 66 f 103 67 g 104 68 h 105 69 i 106 6A j 107 6B k 108 6C l 109 6D m 110 6E n 111 6F o 112 70 p 113 71 q 114 72 r 115 73 s 116 74 t 117 75 u 118 76 v 119 77 w 120 78 x 121 79 y 122 7A z 123 7B 126 7E ~ 127 7F DEL Delete/Supprimer You can also create a new variable containing the string in hexadecimal form. Therefore, it’s length will have to be twice as long as the original variable.Let's say a user-name field should only contain standard unaccented characters. This is bad: the user would have to work out what had been omitted and why and then correct it. Method 1 (validation message) is therefore to be preferred — and this should be inline during entry rather than returned after the form is submitted.I would prefer adding the user's invalid characters to the message as they are entered.

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