Regular expression for validation of a facebook page url

php, regex

Solution

`parse_url()` can help you with that.

<?php

$array = array(
    "www.facebook.com/ABCDE",
    "facebook.com/ABCDE",
    "http://www.facebook.com/ABCDE",
    "https://www.facebook.com/ABCDE",
    "http://www.facebook.com/",
    "http://www.facebook.com/ABC"
);

foreach ($array as $link) {
    if (strpos($link, "http") === false) {
        $link = "http://" . $link; //parse_url requires a valid URL. A scheme is needed. Add if not already there.
    }
    $url = parse_url($link);
    if (!preg_match("/(www\.)?facebook\.com/", $url["host"])) {
        //Not a facebook URL
        echo "FALSE!";
    }
    elseif (strlen(trim($url["path"], "/")) < 5) {
        //Trailing path (slashes not included) is less than 5
        echo "FALSE!";
    }
    else {
        //None of the above
        echo "TRUE";
    }
    echo "<br>";
}

Problem

I need to validate the facebook page url which should not consider http/https or www given or not? I mean the following should be accepted or valid: ``` www.facebook.com/ABCDE facebook.com/ABCDE http://www.facebook.com/ABCDE https://www.facebook.com/ABCDE ``` And following should not be accepted or invalid: ``` http://www.facebook.com/ => User name/page name not given http://www.facebook.com/ABC => User name/page name should have the minimum length of 5. ``` For the above requirement I'd made following regular expression, but it is not checking the User Name or Page Name which is the only problem. Rest is working fine: ``` /^(https?:\/\/)?((w{3}\.)?)facebook.com\/(([a-z\d.]{5,})?)$/ ``` I am very new to Regular Expression, so don't have much idea about it. Any type of help would be appreciable. Thanks in advance.

Original source