Regular Expressions You Should Know(REGEX)

In this section, I will be writing some REGEX that could be helpful  to your  projects.



REGEX #1: Numbers Separated by comma or blank spaces.Example(1,2 ,3  ,4)

   //Numbers Separated by comma or blank spaces
   ^[\d]{1,}(\s*,\s*[\d]{1,})+$
 
 

REGEX #2:  Only number

   //Only Number
   ^(\d)+$
 
 

REGEX #3: Alphanumeric

   //Only Alphanumeric 
   ^(\w)+$
 
 

REGEX #4: Validate URL (either http, https or IP number)

   //Validate URL (either htpp,https or IP number)
   ^(http|https):\/\/([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?$
 
 

REGEX #5: Validate Emails. Example : myUser.test01@gmail.com

   //Validate emails
   ^[\w_.+-]+@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$
 
 

REGEX #6: Validate Hours format

//Validate Hours Format
^[\d]{1,2}:[\d]{1,2}:[\d]{1,2}$

REGEX #7: Validate date format

//Validate date Format
^[\d]{2}\/[\d]{2}\/[\d]{4}$

REGEX #8: Validate IP number format (IPV4)

//Validate IP number format (IPV4)
^[\d]{1,3}.[\d]{1,3}.[\d]{1,3}.[\d]{1,3}$

REGEX #9: Regular expression to limit number of characters to 10

//Limit number of characters to 10
^[a-zA-Z]{1,10}$

REGEX #10: Regular expression: Match Not equal to the string "login"

//Match Not Equal to the string "login"
^(?!login$).+$

REGEX  :Identify Comma outside  Double Quotes

If  you want to identify each comma outside double quotes this is the regex:

(?!\B"[^"]*),(?![^"]*"\B)

Result:

but if you are using PHP the regex above  will not going to work ,so you can use this regex: 

Regex: (,)(?=(?:[^"]|"[^"]*")*$)

Result: