regex optional characters [closed] - php

PHP: Possible modifiers in regex patterns - Manual

string - Regex how to match an optional character - Stack Overflow

I have a regex that I thought was working correctly until now. I need to match on an optional character. It may be there or it may not. Here are two strings.

Конструкции группировки в регулярных выражениях | Microsoft Docs

29 мар 2017 ... Добавление в строку части выражения, которая возвращается методами Regex.Replace и Match.Result.Include a subexpression in the ...

Section 15.3. Regexp Special Characters

This next regexp shows two character classes, with the first being required and the second optional. As mentioned before, $ is a regexp ... If you're able to parse this in your head, you will see that this regexp will match PHP variable names:

optional character in Regular Expression | PHP

PHP 5.6 и PHP 7 на русском: Функция ereg() - Совпадение с ...

С версии PHP 5.3.0, расширение regex помечено устаревшим и заменено ...... {1,2} means min 1 time a character and max 2 times a character (optional you  ...

Java | Группировка в Stream API

30 апр 2018 ... В качестве возвращаемого значения операции группировки используется объект Map . Опять же поскольку ...

PHP: MongoDB\BSON\Regex::__construct - Manual

1.2.0. The flags argument is optional and defaults to an empty string. Characters in the flags argument will be sorted alphabetically when a Regex is constructed.

php - regex optional characters - Stack Overflow

The 3 strings (here are HTML codes, please don't say use HTML parsers, I have to use RegEx): … I want to capture there 3 lines. So tried this: (PHP preg_match) …

PHP: preg_match - Manual

Only if it is not there, you want to match an arbitrary character. Hope this helps some ... @param $pattern regular expression pattern to match # @param $ subject ...

Regex Matching of Optional Character in PHP - Stack Overflow

I'm using PHP's regex preg_match() to try to match a string that occassionally contains a hyphen in the middle. The alphanumeric pattern is consistent: 3 letters followed by 3 numbers and one (optional)...

html tag with name attribute - Regex Tester/Debugger

Regular Expression to Matches any html tag with name attribute equals to.

Regular Expressions in PHP - Tutorial Republic | Character Classes

Learn how to use PHP's three sets of regular expression functions

PHP preg_replace - optional one character regex example... - InfoHeap

regex - Optional Character in PHP Regular... - Stack Overflow

I have data in this format coming from a database... … or … Notice the optional "S" character (which can be any uppercase character)...

Параметры по умолчанию | MDN

5 май 2018 ... Параметры по умолчанию позволяют задавать формальным параметрам функции значения по умолчанию, если для них не указано ...

PHP: preg_split - Manual

This regular expression will split a long string of words into an array of ... If you want to split by a char, but want to ignore that char in case it is escaped, use a ... spected as it match \r as the lookbehind (becouse isn't a \) and is optional before \ n.

кванторы в регулярных выражениях | Microsoft Docs

29 мар 2017 ... string pattern = @"\b91*9*\b"; string input = "99 95 919 929 9119 9219 999 9919 91119"; foreach (Match match in Regex.Matches(input ...