Validating UTF8 characters based emails
2319
How to validate an email address using a regular expression?
25349
Does PHP's filter_var FILTER_VALIDATE_EMAIL actually work?
91499
Subscription feed emails doubly encode  characters
21423
Email address validation using ASP.NET MVC data type attributes
82288
How to get email address from a long string
25161
How to check if an email address is real or valid using PHP
470
UTF-8 all the way through
52753
How to input accents in PlainTeX with UTF-8 encoding?
138280
Php - regular expression to check if the string has chinese chars
84411
How to prevent invalid characters from being typed into input fields
43339
Regular expression to match non-ASCII characters?
157148
What are the valid characters in PHP variable, method, class, etc names?
26864
Special characters in input file
32072
PHP: Convert any string to UTF-8 without knowing the original character set, or at least try
49492
How can I find non-ASCII characters in MySQL?
134272
php form submit utf8?
1358
Validate that string contains only allowed characters in Ruby