Checking if a string is a valid URI
62585
How to check if a URL is valid
9258
Test if string ONLY contains given characters
157148
What are the valid characters in PHP variable, method, class, etc names?
47715
How to check if the URL contains a given string?
25073
How to compare Unicode strings in Javascript?
99390
Regexp that matches valid regexps
116071
Easiest way to convert a URL to a hyperlink in a C# string?
114670
How do I perform an expandable string comparison?
39277
Should URL be case sensitive?
64911
How to do URL decoding in Java?
21579
Can I test if a regex is valid in C# without throwing exception
67764
Rails: What's a good way to validate links (URLs)?
134315
How to test if a string is JSON or not?
131152
Get file name from URI string in C#
120682
How do I verify that a string only contains letters, numbers, underscores and dashes?
31834
Check whether a path is valid
4589
PHP validation/regex for URL