url validator javascript
function validURL(str) {
var pattern = new RegExp('^(https?:\\/\\/)?'+ // protocol
'((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|'+ // domain name
'((\\d{1,3}\\.){3}\\d{1,3}))'+ // OR ip (v4) address
'(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*'+ // port and path
'(\\?[;&a-z\\d%_.~+=-]*)?'+ // query string
'(\\#[-a-z\\d_]*)?$','i'); // fragment locator
return !!pattern.test(str);
}Check if a JavaScript string is a URL
function isValidURL(string) {
var res = string.match(/(http(s)?:\/\/.)?(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)/g);
return (res !== null)
};
var testCase1 = "http://en.wikipedia.org/wiki/Procter_&_Gamble";
alert(isValidURL(testCase1));javascript determine if string is valid url
function isValidHttpUrl(string) {
let url;
try {
url = new URL(string);
} catch (_) {
return false;
}
return url.protocol === "http:" || url.protocol === "https:";
}Best way to check if a URL is valid
filter_var($url, FILTER_VALIDATE_URL);
if (filter_var($url, FILTER_VALIDATE_URL) === FALSE) {
die('Not a valid!!');
}Copyright © 2021 Codeinu
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