Use a regular expression to do a case-insensitive search for "w3schools" in a string: $str="Visit W3Schools";$pattern="/w3schools/i";echopreg_match($pattern,$str); Try it Yourself » Using preg_match_all() Thepreg_match_all()function will tell you how many matches were found for...
Regular expressions (REs) are powerful tools for pattern matching and text manipulation, enabling users to check if strings adhere to a specific pattern. Python introducedremodule in version 1.5, providing complete regular expression functionality, making Python a robust language for regular expressions....
preg_replace()Returns a string where matches of a pattern (or an array of patterns) are replaced with a substring (or an array of substrings) in a given string preg_replace_callback()Given an expression and a callback, returns a string where all matches of the expression are replaced wi...
Pattern Class - Defines a pattern (to be used in a search) Matcher Class - Used to search for the pattern PatternSyntaxException Class - Indicates syntax error in a regular expression patternExampleGet your own Java Server Find out if there are any occurrences of the word "w3schools" in a...