RegExr - Examples

foo # The string "foo" ^foo # "foo" at the start of a string foo$ # "foo" at the end of a string ^foo$ # "foo" when it is alone on a string [abc] # a, b, or c [a-z] # Any lowercase letter [^A-Z] # Any character that is not a uppercase letter (gif|jpg) # Matches either "gif" or "jpeg" [a-z]+ # One or more lowercase letters [0-9\.\-] # –źny number, dot, or minus sign ^[a-zA-Z0-9_]{1,}$ # Any word of at least one letter, number or _ ([wx])([yz]) # wy, wz, xy, or xz [^A-Za-z0-9] # Any symbol (not a number or a letter) ([A-Z]{3}|[0-9]{4}) # Matches three letters or four numbers

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You can use [html][/html], [css][/css], [php][/php] and more to embed the code. Urls are automatically hyperlinked. Line breaks and paragraphs are automatically generated.