Regex for english characters only. test () method to check if the string contains only letters and numbers. println(str); This should return "hello مرحبا ok". , the characters that can be directly entered on a U. answered Apr 14, 2012 at 11:55. The caret ^ matches the beginning of the input, whereas the dollar $ matches the end of the input. What you want is to find if there is any character that do not match this pattern. e. /\ACTR. /^[\u0621-\u064A]+$/ Click To Copy. so éléphant becomes lphant. console. ): // alphanumeric static final validCharacters = RegExp(r'^[a-zA-Z0-9]+$'); The regex above matches upper and lowercase letters and numbers. S. *\Z/m. answered May 24, 2013 at 8:28. Apr 26, 2016 · This regex will do the following: Assume words are entirely made up of alphabetical characters A-Z, upper case and lower case; Find all words; Ignore all strings that contain non-alphabetical characters or symbols; Assumes some punctuation like periods or commas are to be ignored but the preceding word should be captured. That param only accept alphabet characters (a-ZAZ) + whitespaces to separe names and surnames. which accepts only only Arabic characters while I need Arabic characters, Spaces and Numbers. Define the valid characters. Please someone help me out with steps, so that I can implement on my project. Mar 17, 2014 · This will also match an EMPTY string, which may not be desirable in most situations. 10-27-2021 11:11 AM. Strictly speaking, you should probably also escape the . \d Digit. Matches and groups. Aug 27, 2023 · Match Any Character from the Specified Range. seldon. Aug 22, 2011 · How can I validate if the characters in a text input are english characters? -1 Restrict user to enter English only text input, no other language in react native Jul 2, 2022 · Match any specific character in a set. We will provide a regex pattern, explain its components, and give examples of strings that match and do not match the pattern. Try launching the debugger to find out why. match('^[A-Za-z0-9. Use square brackets [] to match any characters in a set. If we want to match a range of characters at any place, we need to use character classes with a hyphen between the ranges. javascript regex : only english letters allowed. How can I define a regular expression which solely accept Persian alphabet characters? I tried the following function, but it doesn't work properly: function Just_persian(str){ var p=/ Oct 17, 2022 · "I would like to have a regular expression that checks if a string contains only upper and lowercase letters, numbers, and underscores" doesn't limit it to Latin letters. Japanese cannot be entered in textbox. In theory it is possible, if regex contained every word from English dictionary. com. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide. The + and * are quantifiers. 13. For example: if you want to allow digits from 0 to 9, just use this regex pattern: var englishAlphabetAndDigits = /[A-Za-z0-9 ]/g; Full code: Oct 23, 2014 · 1. 138. In this article, we will explore how to create a regular expression that accepts English letters, numbers, and special characters while allowing only English letters. . – mtanti. Note that this accepts numbers in words too. Jun 10, 2011 · Then comes the character class [A-Za-z0-9])[$!@\{\}\[\]A-Za-z0-9] where you can put in the characters that you want to match. I created the following regEx but it's removing also the stressed vowels which is not the idea Feb 10, 2014 · ^ assert position at start of the string [\w@'-]+ match a single character present in the list below Quantifier: Between one and unlimited times, as many times as possible \w match any word character [a-zA-Z0-9_] @'- a single character in the list @'- literally $ assert position at end of the string Jan 18, 2014 · Anything between two [] (brackets) is a character class. 987 2 8 20. Would this be possible? Do I have to set up a locale on my MVC application or rather just do a regex textbox validation? Just a side note, I want to be able to enter numbers and other characters. Net Validation for a textbox - must have minimum of 1 number but want to allow special characters & letters Oct 16, 2018 · 1. Well, there is an issue in that -, is being interpreted as a range, like a-z, allowing all characters from space to comma. Your regex will match anything that contains a number, you want to use anchors to match the whole string and then match one or more numbers: regex = new Regex("^[0-9]+$"); The ^ will anchor the beginning of the string, the $ will anchor the end of the string, and the + will match one or more of what precedes it (a number in this case Dec 19, 2012 · Update: As elclanrs understood (and the rest of us didn't, initially), the only special characters needing to be allowed in the pattern are &-. I have this one: The i at the end of the expression in the example makes this regular expression case-insensitive, allowing it to match the uppercase B in the input string, even though the pattern is itself all lowercase. So far, what I have been able to come with for goal #1 is quite simple: String. Using \w can match both letters and digits, so using (?:\w){9,}, which can be written as \w{9,} can also match only letters or only underscores. _. -]+$/ following strings are also accepted: tavish. Feb 10, 2010 · In the PLSQL function, do an asciistr () of your input. Also after using. org Character classes. var nameReg = /^[A-Za-z]*$/; Otherwise, john123 returns valid as the Regex is matching john and can ignore the 123 portion of the string. For the invalid characters you can use Feb 10, 2016 · RegEx to make sure that the string contains at least one lower case char, upper case char, digit and symbol 905 Regex for password must contain at least eight characters, at least one number and both lower and uppercase letters and special characters A regular expression that can be used to match and validate Arabic characters in a string. It can also be used to replace text, regex define a search pattern Nov 23, 2014 · If you work with strings (not unicode objects), you can clean it with translation and check with isalnum(), which is better than to throw Exceptions: . Use a character class: var nameReg = /^[A-Za-z]*/; Without the containing [] (making it a character class), you're specifying a literal A-Za-z. Apr 24, 2019 · I am trying to check text with regular expression and i need to check if it contains only letters, spaces and also non english characters. I only want this to exclude letters. ‘ [a-f]’ will match a single character which can be either of ‘a’, ‘b’, ‘c’, ‘d’, ‘e’ or ‘f’. While in multi-line mode you can still match the start and end of the string with \A\Z permanent anchors. mozilla. This is the most straightforward component of the regex pattern. From the MDN Docs, the function returns -1 if there is no match. the + searches for 1 or more characters, while the * searches for zero or more characters. \* \\ escaped special characters \t \r: tab, linefeed, carriage Apr 11, 2012 · Depending on the regex engine, you may be able to use: ^\p{IsBasicLatin}*$ To allow only characters in the Basic Latin character set, which includes standard English lanuage punctuation (i. translate(None, string. g. Include the word (s) or a single character in the pattern you are searching for in the text. You can create a regex that detects non-English characters. I need to validate a classifieds title field so it doesn't have any special characters in it, almost. If you need other characters you can add them. I don't know if that's what you want. I wan't the field to be only filled in English (I Don't want to allow any Chinese characters to be submitted) So far I've come up with this: Jul 16, 2012 · Problems in your original regex: | doesn't mean alternation in a character class, it means a pipe character literally. If you want only Hebrew letters (along with English letters) the regex would be: /^[a-z\u05D0-\u05EA]+$/i. [\w] is the same as [a-zA-Z0-9_] Though the dash doesn't need escaping when it's at the start or end of the list, I prefer to do it in case other characters are added. The search function takes both strings and regexes, so the / are necessary to specify a regex. Example: The regular expression should match: this-is-quite-alright. [0-9], [a-z], etc, but it will only match 1 character. NET, Rust. replaceAll("\\P{InArabic}+", ""); System. answered Jun 4, 2017 at 0:00. But if you want to accept every character except numeric characters, it might be simpler to simply use: "^\D+$". Oct 30, 2012 · I want to put validation on a textbox which doesnt allow to enter any langugae character except english. 10. Regular Expression to Match only string of english characters. – Zack Aug 26, 2016 at 18:49 Feb 8, 2023 · I want to use a regex pattern that only allows English characters with no spaces and no special characters in flutter. Aug 14, 2022 · str = str. Mention the hexadecimal values or ranges for special character in regex character class and repeat the same regex again along with 0-9 to avoid starting of any string from any digit. Roll-over elements below to highlight in the Expression above. It does not enforce that the string contain only non-letters. Matching performs a little better when checking for a long, but fully valid string, but worse for invalid characters near the end of the string. You can also Save & Share with the Community Jun 4, 2017 · 0. Use regex like below. Use ^ [A-Za-z] [A-Za-z\d-]+$ instead. !/^[0-9. Nov 20, 2022 · This part in the regex with Javascript and C# [\w-\. e. The PLSQL is because that may return a string longer than 4000 and you have 32K available for varchar2 in PLSQL. Character set. The ^ at the beginning of your example is a negation of Apr 19, 2015 · 88. Using + will allow many characters. Click to open in Reference. The forward slashes / / mark the beginning and end of the regular expression. Jan 13, 2017 · I am a novice in regex. . any character except newline \w \d \s: word, digit, whitespace \W \D \S: not word, digit, whitespace [abc] any of a, b, or c [^abc] not a, b, or c [a-g] character between a & g: Anchors ^abc$ start / end of the string \b: word boundary: Escaped characters \. I need an expression that will only accept: numbers ; normal letters (no special characters) -Spaces are not allowed either. This should do the trick. In the regex pattern, a character is anything from a single letter of the alphabet to a numeric digit that you want to search for. Do not match any control or unassigned characters. I see you already have an accepted answer, but here's another, more concise option: /^\w+( \w+)*$/. 3k 11 67 91. I'm not able to filter this in a easy way, how can I build a regular expression or a filter to get my desireable output? Example: Jun 11, 2020 · ดาวน์โหลด Jupyter Notebook ที่ใช้ในคลิปได้ที่: https://bit. But with the regex /^[a-zA-Z '. I want Regular Expression to accept only Arabic characters, Spaces and Numbers. + Quantifier. Do not match any control characters. From there, just add the rest of your parameters of what you are looking for. Regex: ^[A-Z][a-z]{1,15}$ Explanation: [A-Z] matches first upper case letter. The square brackets [] are called a character class. Jun 22, 2015 at 13:41. You are missing start and end anchors. a-z: All lowercase letters ' ': Spaces If you need unicode / internationalization, you can try this regex: Apr 11, 2012 · Depending on the regex engine, you may be able to use: ^\p{IsBasicLatin}*$. 4ms) RegExr was created by gskinner. It tells you only whether it matched and Feb 15, 2011 · When using a regex with preg_match (), you need to specify a regex delimiter. \d would allow numbers. The test method is the absolute simplest way to match a regular expression. Example 1 regex: a[bcd]c. That function converts the non-ASCII characters to \xxxx notation. try this out: A-Za-z would allow alphabets. Regex101 Demo It works fine with english text, but the problem is when I provide a french text like éléphant, it considers the french characters as special character, and deletes the french characters. Now for a given string, the characters of the string are checked one by one using Regex. If you don't want to match consecutive dots or hyphens, you can use a pattern like this and then extend it if you have more characters that you want to allow: Jun 11, 2015 · I'm generating a XML file to make payments and I have a constraint for user's full names. Example 2 regex: a[0-7]c. You can add them like this: May 24, 2013 · If you need to allow specific special characters, simply include them in the character class: "^[a-zA-Z\-]+$". matches a period rather than a range of Apr 29, 2019 · I have this line to remove all non-alphanumeric characters except spaces. Is there any way to allow the french characters inside the regular expression? Thanks a lot in advance. _ would allow underscore. Mar 11, 2013 · For example, all Chinese, Japanese, Cyrllic, but also single characters like: à, â, ù, û, ü, ô, î, ê. Instead of using \w you can use [A-Za-z0-9] to match ASCII chars and digits 0-9 in C#. Characters in Regex. <!-- language: c# --> string s = "Mötley Crue 日本人: の氏名 and Kanji 愛 and Hiragana あい"; string r = Regex. Here 't Sep 29, 2008 · The answer given by Jeremy Ruten is great, but I think it's not exactly what Paul Wicks was searching for. It can also be used to replace text, regex define a search pattern Dec 1, 2017 · The regex you're looking for is ^[A-Za-z. You used \w in your first character, which accepted underscores. Replace (s," [^\\w\\s-]*",""); The above produces r with: Mötley Crue 日本人 の氏名 and Kanji 愛 . r'/^[a-zA-Z]+$/' The string entered in the username always returns false with spaces and special characters and without. \u stands for upper character and doing a case insensitive find. Regex Tutorial - A Cheatsheet with Examples! Regular expressions or commonly called as Regex or Regexp is technically a string (a combination of alphabets, numbers and special characters) of text which helps in extracting information from text by matching, searching and sorting. An empty string shouldn't be validated (e. Jason , jason , jason smith , jason smith , JASON , Jason smith , jason Smith , and jason SMITH ). pattern = /^[\w&. Your regular expression does not match the subject string. log(txt, !txt. sub(r'\W+', '', s) Although, it still keeps non-English characters. ), apostrophe ('), and space. String. 0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive) $ asserts position at the end of the string, or before the line terminator right at the end of the string (if any) Match Information. sub(r'\W+', '', 'This is a sentence, and here are non-english 托利 苏 !!11') I want to get as output: > 'This is a sentence and here are non-english 11' Nov 3, 2021 · 2. re. ^[a-zA-Z]*$. \s_-]+$ ^ asserts that the regular expression must match at the beginning of the subject [] is a character class - any character that matches inside this expression is allowed; A-Z allows a range of uppercase characters; a-z allows a range of lowercase characters. Numbers are not required to be in Arabic. drf. Feb 24, 2016 · Replace all non-English characters with a space. The Regex An explanation of your regex will be automatically generated as you type. [a-z]{1,15} matches rest of the letters. both will work in this instance. To make a word boundary out of it, we could simply reverse it on both sides: [^ء-ي]ARABIC TEXT[^ء-ي] The code above means: don't match any Arabic characters on either sides of an Arabic word which will work in your case. A regular expression (shortened as regex or regexp ), [1] sometimes referred to as rational expression, [2] [3] is a sequence of characters that specifies a match pattern in text. Mar 8, 2010 · Also see this: Regular expression to match non-English characters? edit my brain filtered out the "I don't want to use a regex" because it failed the "isSilly()" test. \A = means start of string. Matches only a single character from a set of Jan 8, 2019 · Hi Team, I have a Input block with input type as Text. \P{Cc}: Match only non-control characters. For example: [A-Za-z\xf6-\xf8\xe5]+[A-Za-z\xf6-\xf8\xe50-9]*. Mar 5, 2010 · For the first name, it should only contain letters, can be several words with spaces, and has a minimum of three characters, but a maximum at top 30 characters. Some special characters need to be escaped, some don't. Some example for hexadecimal values and their special character. Use \d to match any single digit. CTR = literal CTR. 3. any character except newline \w \d \s: word, digit, whitespace Jul 21, 2019 · I want to prevent user to enter non-english characters (like Chinese, Korean, etc. Matches the beginning of the string, or the beginning of a line if the multiline flag ( m) is enabled. \P{Cc}\P{Cn}\P{Cs}: Match only non-control characters that have been assigned and are UTF-8 valid. This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. To counter that simply replace the trailing * with + So basically it's ^[a-zA-Z0-9]+$ to avoid false positives generated by empty strings. So you can use regular expressions to find and remove those. Most regex flavours use /, but PHP lets you use most matching pair of chars, e. (eg. , Name inputfield must take only Alphabets) I have checked and and non worked out/Not understanding. * = zero or more of any character except newline. regex. Sep 3, 2013 · Use this to check all characters until the end of your string, otherwhise your pattern will only check the first character: re. Also note: that this works for only a-z, A-Z. If there are spaces, it will fail. I would consider adding ' (single quote) as well, for foreign consonants that are missing in Hebrew (such as G in Only auto-run code that validates Auto-save code (bumps the version) Auto-close HTML tags Auto-close brackets Live code validation Feb 8, 2018 · MVC 5 model validation regex to block special characters 1 ASP. Add the characters you want within the [ ] square brackets. match(reg)); Regex Tutorial - A Cheatsheet with Examples! Regular expressions or commonly called as Regex or Regexp is technically a string (a combination of alphabets, numbers and special characters) of text which helps in extracting information from text by matching, searching and sorting. The group is surrounded by square brackets []. See full list on developer. This means you won't be matching the string from start to finish. it will match any character between the brackets. UPDATE: Add a $ to the end of the Regex. Edit the Expression & Text to see matches. RegExp('[a-zA-Z]'); This is what I used before, but it allows spaces and other characters. Regex can be used to check a string for alphabets. Validate your expression with Tests mode. You can also use ranges. Do Oct 27, 2021 · Go to Solution. Only letters and numbers should be allowed, and also the three Swedish letters å, ä, ö (upper- or lowercase). Note that - is at the end (because otherwise it'd be a range) and a few characters are escaped. With Numbers: Use this regex instead if you’re looking for a Regex to match Arabic characters and 1-9 numbers: Apr 5, 2022 · For any string, here the task is to check whether a string contains only alphabets or not using Regex. Detailed match information will be displayed here automatically. Jul 10, 2013 · If you just need English, try this regex: "^[A-Za-z ]+$" The brackets specify a set of characters. - would allow hyphen. The ^ at the beginning of my expression ensures that it matches from the start of the beginning and the $ at the end ensure that it matches the end of the string. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. Hi @Cfdiaz2103, \w+ will match one or more word characters from a field and [ [:alpha:]]+ will match one or more letters from a field. $ End. The side bar includes a Cheatsheet, full Reference, and Help. 10-27-2021 11:13 AM. Quick May 20, 2014 · @mike: No fundamental difference - you can use any non-alnum ASCII character as a regex delimiter (even paired ones like <>, although that's not used often for good reasons). If you want to allow numbers/digits or any other special characters, it’s just a matter of updating the regular expression pattern. Escape that and at least some of the bugs should be fixed. Nov 19, 2017 · If by letters you mean language main 28 characters you don't even have to construct a code-point based character class (you can build it by typing letters manually!). For ex. punctuation). The built-in regular Nov 22, 2016 · Or we can simply use Arabic letters directly. import string def isEnglish(s): return s. (You can add a range of characters by using a -dash. Jeremy's regex matches only non-english letters, so there's need for small improvement: ([^\x00-\x7F]|\w)+ or ([^\u0000-\u007F]|\w)+ Jul 1, 2019 · I am working on a form which one of its custom validators should only accept English and Persian text, I tried the following expression that includes English and Arabic characters only, Arabic doesn't include all Persian characters, any help Nov 15, 2012 · 0. Mar 30, 2018 · m = enables multi-line mode, this sets regex to treat every line as a string, so ^ and $ will match start and end of line. \P{Cc}\P{Cn}: Match only non-control characters that have been assigned. – May 5, 2014 · With /^[a-zA-Z]/ you only check the first character: ^: Assert position at the beginning of the string [a-zA-Z]: Match a single character present in the list below: a-z: A character in the range between "a" and "z" A-Z: A character in the range between "A" and "Z" If you want to check if all characters are letters, use this instead: May 27, 2015 · The Hebrew Unicode adds a lot of punctuation and symbols (as you can see in the table here) irrelevant for such validation. A-Z: All capital letters. Regex character sets allow you to match any one character from a group of characters. Pls let me know know if you have any regex for this task. [ء-ي]+. You used + for your following characters, meaning one or more, so a one-character string like '_' wouldn't match. By "English text" I mean not only actual letters and numbers but also punctuation. replaceAll("\\W", " ") 27 matches (0. Reading the requirements, you can match 9 or more times a letter or a digit and make sure that the string does not contain only letters using a negative lookahead if that is supported. And I have exactly the same requirement. ly/3dnL35iเชิญสมัครเป็น Oct 20, 2017 · I have a Java app where I need to have a regex that replace ALL except characters and number (including the spanish characters as stressed vowels and ñ/Ñ) It's also needs to include some specific spacial characters. Mar 3, 2024 · We called the RegExp. That will detect text that is definitely not English, but won't be able to confirm it definitely is. I think the OP wants both accented and non-accented letters though so just non-accented letters for example wouldn't do. Create a method that returns true if a string contains any non-English character. For example if I have. isalnum() print isEnglish('slabiky, ale liší se podle významu') print isEnglish('English') print isEnglish('ގެ ފުރަތަމަ ދެ އަކުރު ކަ') print Why not add a Unicode range for all Latin characters to your regex? r"[\u00C0-\u017F]" Will match all your diacritically enhanced Unicode characters using Latin based alphabets. To do so, you simply need to use a negated character class [^ and then check if string. @Marcus The pattern looks for any character other than upper/lower letters, and your single whitespace matches. Dec 22, 2010 · 5. / is the de facto standard, but if your regex contains slashes, using other delimiters is often preferable because then you don't have to escape them. If you must ensure that no non-letter characters are matched, anchor the regex like ^[^A-Za-z]+$ -- I think that's what you are asking. Dec 19, 2013 · 1. You can set the upper limit. I'm Chinese, apparently my brain told me it should be "Han" not "Hani", they forced all the code names into 4 chars. Apr 11, 2016 · Keeping the first letter in upper case this would be the regex. It should not match this -is/not,soålright Nov 3, 2014 · In your question, you say you only want to allow letters A-z, numbers 0-9 and space. matches () method is used to check whether or not the string matches the given regex. But of course, this will return an empty string because we're removing any non-Latin characters in the first regex then we remove any non-Arabic characters in the second regex. ^ Beginning. This solution is far superior to the above solutions since it also supports international (non-English) characters. ] does not seem to be a valid range in a character. Use \w to match any single alphanumeric character: 0-9, a-z, A-Z, and _ (underscore). "^[a-zA-Z0-9_]+$" fails. There's a similar difference between the regex methods matching all valid characters and searching for invalid characters. You could always check the character code of each letter in the word, but that's going to be slower (maybe much slower) than letting the regex matcher work. The following example checks whether Do not match any invisible characters. and (), too, since those have special meaning in regular expressions. If I understand correctly Paul asked about expression to match non-english words like können or móc. The only difference is, "Hani" is the "code name", "Han" is the real name of the language. Use \s to match any single whitespace character. Character classes. \-]+$/. ( I need special character only for the middle name) So I tried following regular Apr 25, 2019 · As long as there will be either a number, or a Chinese character, it will consider your input as valid. Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. PCRE & JavaScript flavors of RegEx are supported. ]+$/. Roll over matches or the expression for details. Shrug. test(s) Please note that will match only numbers and decimals, so you need to negate it (the !) answered Dec 19, 2013 at 14:33. "The following regex matches alphanumeric characters and underscore" doesn't limit it to Latin letters. Could you clarify? Jul 9, 2010 · 9. Anchor ^ and $ makes sure that whole string is a match and not part of whole string. May 22, 2012 · Once you know what the symbols mean, it's obvious not only that ^[a-zA-Z]+(\s+[a-zA-Z]+)*$ matches exactly what's wanted, but that it does so as efficiently as possible. Let's dive in! To create a regular expression that Oct 4, 2023 · Regular expression syntax cheat sheet. Like "Grek" vs "Greek". ). Mar 2, 2018 · I got a reference from the link: Javascript validation to allow only Alpha characters, hyphen (-), dot (. Match 1 or more of the preceding token. Use Unicode regex where available, so non ASCII letters are still detected. To allow only characters in the Basic Latin character set, which includes standard English lanuage punctuation (i. I need a special regular expression and have no experience in them whatsoever, so I am turning to you guys on this one. Starts with a word, then followed by any number of words with a single space in front. Aug 1, 2023 · On the top you can see the number of matches, and on the bottom an explanation is provided for what the regex matches character by character. Then, you say it should still succeed if there is ' or " . I want to apply regex to filter out numeric numbers and Special characters on keypress for Mobile Development. Feb 2, 2013 · 28. According to RegexBuddy, this regex matches the string "Lorem ipsum tritani impedit civibus ei pri" in only twenty-two steps, where yours takes two hundred and twenty-two! Jul 4, 2012 · Arabic (0600—06FF, 225 characters) Arabic Supplement (0750—077F, 48 characters) Arabic Extended-A (08A0—08FF, 39 characters) Arabic Presentation Forms-A (FB50—FDFF, 608 characters) Arabic Presentation Forms-B (FE70—FEFF, 140 characters) Rumi Numeral Symbols (10E60—10E7F, 31 characters) Arabic Mathematical Alphabetic Symbols (1EE00 Jul 8, 2010 · I just realized that will only match one character, so I had to add the + to make it [ -~]+ "any ascii character, one or more times" for my usage. Matches any digit character (0-9). It will also allow to have the first character - or . ,:;!?()]+$', str) Note that the character class doesn't contain spaces, newlines or tabs. match(regex) is falsy. The / starting and ending the regular expression signify that it's a regular expression. I found the following expression: ^[\u0621-\u064A]+$. Mohsen Afshin. out. Oct 11, 2012 · Via this site you can easily create unicode regex for many languages: Arabic: [\u0600-\u06FF] answered Oct 11, 2012 at 19:59. ^ and $ represent the start and end of string respectively. keyboard). The code above will match any Arabic letters. But if you mean Arabic ( 0600 – 06FF , 255 characters) then again that long character class doesn't provide what you desire. Apr 16, 2012 · to validate a complete string that should consist of only allowed characters. For example, t[ah]i matches "tai" and "thi". ~. el tx hf az ta cq ra kz kx pc