\WMatches any non-word character, equivalent to[^a-zA-Z0-9_]. \sMatches any whitespace character (spaces, tabs, line breaks). \SMatches any non-whitespace character. 2. Regex Meta Characters Example Let us see a few examples of using the meta characters in regular expressions and matching...
get the last character of a string get the logged in Username and Domain name Get the selected item in dropdownlist to display relevant data in label & textbox (sqlServer, c#, VWD) Get the time remaining before a session times out. get Url Hash (#) from server side Get value asp:Text...
JavaScript is now best in class for some features like lookbehind (with it's infinite-length support) and Unicode properties (with multicharacter "properties of strings", set subtraction and intersection, and script extensions). These features are either not supported or not as robust in many ...
(?:https?\:|^|\s) - non-capturing group. It matches but does not capture a substring that is preceded by one of the following: https, http, start of string (^), a whitespace character (\s). The last two items are included to handle protocol-relative URLs like "//google.com". \...
'm' and max. 'n' (greedy) {m} Exactly 'm' {m,} Match min 'm' and max. [abc] Character class, match if one of {'a', 'b', 'c'} [^abc] Inverted class, regexMatch if NOT one of {'a', 'b', 'c'} [a-zA-Z] Character ranges, the character set of the ranges { a...
Any non-whitespace character \S Any digit \d Any non-digit \D Any word character \w Any non-word character \W Match everything enclosed (?:...) Capture everything enclosed (...) Zero or one of a a? Zero or more of a a* One or more of a a+ Exactly 3 of a a{3} 3 or ...
这个问题确实是老问题了，但是有一些与PHP 7.3和更新版本相关的新开发需要介绍。PHP PCRE引擎迁移到PCRE...
Dollar ($): matches the position rightafter the last characterin the string. It ensures that the specified pattern occurs right before the end of a line, with no characters following it. To understand line anchors better, let’s explore some simple examples: ...
You can also specify a min and max range: /\w{4,6}/g Copy So any word character that is at least 4 characters long and at most 6. Character sets Character sets allow you to plonk stuff in square brackets which basically says match on anything that is within these square brackets. So...
regmatches（而不是strsplit）怎么样？