regex

Regex credit card number tests

Common credit card vendor regular expressions: Amex Card: ^3[47][0-9]{13}$ BCGlobal: ^(6541|6556)[0-9]{12}$ Carte Blanche Card: ^389[0-9]{11}$ Diners Club Card: ^3(?:0[0-5]|[68][0-9])[0-9]{11}$ Discover Card: ^65[4-9][0-9]{13}|64[4-9][0-9]{13}|6011[0-9]{12}|(622(?:12[6-9]|1[3-9][0-9]|[2-8][0-9][0-9]|9[01][0-9]|92[0-5])[0-9]{10})$ Insta Payment Card: ^63[7-9][0-9]{13}$ JCB Card: ^(?:2131|1800|35\d{3})\d{11}$ KoreanLocalCard: ^9[0-9]{15}$ Laser Card: ^(6304|6706|6709|6771)[0-9]{12,15}$ Maestro Card: ^(5018|5020|5038|6304|6759|6761|6763)[0-9]{8,15}$ Mastercard: ^(5[1-5][0-9]{14}|2(22[1-9][0-9]{12}|2[3-9][0-9]{13}|[3-6][0-9]{14}|7[0-1][0-9]{13}|720[0-9]{12}))$ Solo Card: ^(6334|6767)[0-9]{12}|(6334|6767)[0-9]{14}|(6334|6767)[0-9]{15}$ Switch Card: ^(4903|4905|4911|4936|6333|6759)[0-9]{12}|(4903|4905|4911|4936|6333|6759)[0-9]{14}|(4903|4905|4911|4936|6333|6759)[0-9]{15}|564182[0-9]{10}|564182[0-9]{12}|564182[0-9]{13}|633110[0-9]{10}|633110[0-9]{12}|633110[0-9]{13}$ Union Pay Card: ^(62[0-9]{14,17})$ Visa Card: ^4[0-9]{12}(?:[0-9]{3})?$ Visa Master Card: … Read more

How to match Cyrillic characters with a regular expression

If your regex flavor supports Unicode blocks ([\p{IsCyrillic}]), you can match Cyrillic characters with: [\p{IsCyrillic}] or [\p{Cyrillic}] Otherwise try using: [U+0400–U+04FF] For PHP use: [\x{0400}-\x{04FF}] Explanation: [\p{IsCyrillic}] Match a character from the Unicode block “Cyrillic” (U+0400–U+04FF) «[\p{IsCyrillic}]» Note: Unicode Characters list and Numeric HTML Entities of [U+0400–U+04FF] .

How can I recognize an evil regex?

Why Are Evil Regexes A Problem? Because computers do exactly what you tell them to do, even if it’s not what you meant or is totally unreasonable. If you ask a regex engine to prove that, for some given input, there either is or is not a match for a given pattern, then the engine … Read more