8 basics of regular expression that can make you expert

Well, regular expressions have been something that I was scared of when I started coding as a serious stuff. The string literals puzzled me like anything. preg_match, preg_grep, preg_split, preg_replace etc have been something I always wanted to avoid. But thanks to phpbuilder and php that I can now handle them with some ease. And this is for you guys who find regular expressions tacky.

.

VERY BASICS:

1. “^tech“

Searches a string that starts with tech.

2. “logy$”

Searches for strings that ends up in logy.

3. “a*b”

Looks for a string that has either zero or more a’s but exactly one b following a. (eg. b, ab, aab, aaab, aaaaaaaaaaaaaaaaab etc.).

4. “a+b”

Same as a*b but only difference is that atleast one a should be there in the string unlike a*b which can overlook a. (eg. ab, aab,aaaaaaaaab etc).

5. “a?b”

In this case string might have either zero or a single a (eg. ab or b) only these two possibilities are there.

.

QUANTIFYING THE CHARACTERS:

To quantify the characters into certain sets and utilize them we can use paranthesis().

6. “(abc)+def”

Matches a string which consists of pattern having abc either one or n times followed by def at the end.

.

LOGICAL OPERATORS [OR(|) & AND(.)]:

7. “(a|b)*c”

A string of a and b that ends in a c.
To specify range of characters. For instance to match that in a password small-case character, you can specify the set as [a-z] or [A-Z] or [0-9].

8. “([a-z])|([A-Z])”

Searches for a pattern having either small-case or capital letters.

.

That’s all
Cheers!!

Recently Published

»

Modern Changes That You Should Consider for Your Web Site

Websites need to modernize and get updated periodically otherwise ...

»

Super Tips For A Flawless Website

A website has a specific purpose. And your job is to design a website ...

»

Wix Offers Best Free Web Apps for Artists and Photographers

The famous online website builder Wix is known for providing the ...

»

What You Should Know Before Setting Up a Digital Marketing and Web Design Company

Running a digital marketing and web designing company can be a ...

»

Important Factors to Think About When Starting a Mailing List

Many bloggers and business owners don’t have a mailing list, ...

»

Tried and Tested Strategies for Boosting eBook Sales

As you have by now realized, writing your ebook was just the first ...

»

What Really Makes a Website User-Friendly

Whether it’s for business or personal use, having a website online ...

»

5 Features of Virtual Private Server that put you in complete Control of Your Website

For a decade now, virtual private server has been a preferred hosting ...

»

8 Ways the Right Ecommerce Platform Makes Your Business Perform Better

Starting your own ecommerce store is an exciting experience, but ...