Which symbols should not be allowed in forms?
66046
What are the common defenses against XSS?
59766
Hide or disable form options?
70405
unnecessary exclamation marks(!)'s in HTML code
48717
The line produced by \not looks bad on wider symbols
106006
Special characters
4511
What characters are allowed in the HTML Name attribute inside input tag?
120391
What are the security risks of allowing all characters in the website URL?
58989
Regex to only allow alphanumeric, comma, hyphen, underscore and semicolon
130012
Drupal 7 site display unexpected symbols
107944
How to limit a JTextArea to only accept a legal set of characters?
85549
Allowing only alphabets in textField
5933
How to negate a specific symbol?
104766
Are tag edits of less than 6 characters supposed to be allowed
2338
Using contracted forms ("don't", "let's") in a formal text
116559
Character limits on textarea fields - pros and cons and best practices?
59783
Capital Letters that are built-in symbols
157148
What are the valid characters in PHP variable, method, class, etc names?