I need help in writing one regular expression where I want to remove unwanted characters in the start and end of the email address. For example:
z>[email protected]<kt
z>[email protected]<kt
z>[email protected]<kt
z>[email protected]<kt
After applying regular expression my emails should look like:
[email protected]
[email protected]
[email protected]
[email protected]
Regular expression should not applied if email address is already correct.
Find ^[^>]*>([^<]*)<*.*$ and replace it with \1
Here's an example on regex101
I think you might be missing the point of a regular expression slightly. A regular expression defines the 'shape' of a string and return whether or not the string conforms to that shape. A simple expression for an email address might be something like: [a-z][A-Z][0-9]*.?[a-z][A-Z][0-9]+@[a-z][A-Z][0-9]*.[a-z]+
But it is not simple to write one catch-all regular expression for an email address. Really, what you need to do to check it properly is:
Ensure there is one and only one '@'-sign.
Check that the part before the at sign conforms to a regular expression for this part:
Try using a capturing group on anything between the characters you don't want. For example,
/>([\w|\d]+@[\w\d]+.\w+)</
Basically, any part that the regexp inside () matches is saved in a capturing group. This one matches anything that's inside >here< that starts with a bunch of characters or digits, has an @, has one or more word or digit characters, then a period, then some word characters. Should match any valid email address.
If you need characters besides >< to be matched, make a character class. That's what those square bracketed bits are. If you replace > with [.,></?;:'"] it'll match any of those characters.
Demo (Look at the match groups)
