A ^ matches the position at the beginning of the input string and a $ matches the position at the end of the input string.
To clarify, I’m looking for a decent regular expression to validate URLs that were entered as user input with.
I have no interest in parsing a list of URLs from a given string of text (even though some of the regexes on this page are capable of doing that). /(((http|ftp|https):\/) (([0-9a-z_-] \.) (aero|asia|biz|cat|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|pro|tel|travel|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cu|cv|cx|cy|cz|cz|de|dj|dk|dm|do|dz|ec|ee|eg|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mk|ml|mn|mn|mo|mp|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|nom|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ra|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw|arpa)(:[0-9] )?
The easiest and safest way to check whether an email address is well-formed is to use PHP's filter_var() function.
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I am using Regular expression validator for validating URL (of validators) Here is the expression: http(s)? Also, next time, you might want to include the programming language or context, because regex processors vary greatly in feature support. :[-a-z0-9] \.)*[-a-z0-9] .*)/i What this matches: Anything that starts with https://, or They prevent those specific groups of characters from being assigned a number. Also, next time, you might want to include the programming language or context, because regex processors vary greatly in feature support. I developed this by little trial and error and covers u r scenario.... It works well for fully qualified URL, but doesnt work if we use URL without http or https That is it validates: but not validates com what i need is that in addition to current behaviour, it validates the url not having http specifying, that is it should validate com too Thanks Friends Manish Sadhwani if your regex processor has trouble. It's not terribly strict, but it matches all standard domain names (but might let slip through some invalid ones). or, see this url should work for most regex processors:/((? Followed by at least one or more valid domain characters (a-z, 0-9, or -)Matches without case sensitivity (/i)It does not enforce white space, so it will match this: blah and return you want to enforce space, add \s to the beginning, but then you have to ensure that you add a space to the beginning of the string to match. They can be replaced with matching groups () if your regex processor has trouble. It's not terribly strict, but it matches all standard domain names (but might let slip through some invalid ones). Regex regex = new Regex(@" ^ # anchor at the start (?