Regular expressions provide a powerful, flexible, and efficient method for processing text. At a minimum, processing text using regular expressions requires that the regular expression engine be provided with the following two items of information: For an overview of the regular expression object model, see The Regular Expression Object Model.
Replace method replaces the matched string with System. Empty; in other words, it removes it from the original string. FS Contact Forms is an excellent plugin, it is very customizable, and allows for you to utilize a lot of really great features, but does rely on you to provide any Regex you may need to validate your forms.For many Word Press website owners, this just doesn’t quite cut it considering they’ve likely never used regex before and most of the copy/paste solutions won’t be formatted for exactly what you may need.Recently I was tasked with writing a regular expression that would check for a valid Australian phone number for both landline and mobile phone variants whilst allowing for different formats (spaces, no spaces, international dialing code, brackets, area code, no area code).The below regular expression code and subsequent tests are for Australian mobile and landline numbers only, but could be tweaked to work for other countries as well. phone Number7.match(phone Expression)) Supported formats: 0411 234 567, 61411 234 567, (02) 3892 1111, 38921111, 3892 111, 02 3892 1111 I haven’t encountered any issues using this expression, but it is possible there could be caveats using this.
You can concatenate simple regular expressions into complex search criteria to validate against complex patterns, such as any of several words with different endings.