How to validate a vine url - php

Question

I would like to know how to validate a vine.co URL using php
Here is a demo URL
https://vine.co/v/hnVVW2uQ1Z9
All vine.co URL's have https://vine.co/v/
So I' guessing that URL can be validated using regex by using https://vine.co/v/. If someone can point me out how to do this will be much appropriated.
Thank in advance.

Answer 1

No need of regex. Use stripos function:
// assuming $url is input URL to your code
$vineURL = 'https://vine.co/v/';
$pos = stripos($url, $vineURL);
if ($pos === 0) {
echo "The url '$url' is a vine URL";
}
else {
echo "The url '$url' is not a vine URL";
}

Answer 2

The regex for this would be very simple:
$pattern="#^https://vine.co/v/\w*$#i";
$input_url="https://vine.co/v/hnVVW2uQ1Z9";
if(preg_match($pattern, $input_url)){
echo "Valid URL";
} else {
echo "Invalid URL";
}

Answer 3

Using regex:
$url = 'https://vine.co/v/hnVVW2uQ1Z';
if (preg_match("#^https?://vine.co/v/[a-z0-9]{10}$#i", $url)) {
// valid
} else {
// invalid
}
If you're sure that the the string to validate will always be a URL, then you can simply check if it contains the vine URL format. This can be accomplished by using the less memory-intensive, stripos() function:
if (stripos(trim($url), 'https://vine.co/v/') !== FALSE) {
// valid
} else {
// invalid
}