How can I validate a URL to make sure it includes a tld?

[MorbidEntree]

I'm looking to be able to validate a URL to make sure it has a tld in it (ex. http://example.com, instead of http://example).

 

I know that I can use the following code to validate a URL, but it doesn't make sure that it has a tld, just that it has http/https/etc.

if (filter_var($url, FILTER_VALIDATE_URL) === FALSE) {
    die('Not a valid URL');
}

(By the way, I am not very experienced in PHP, but I do know some basics)

[Jacques1]

You mean a public TLD? Parse the URL and then check if the host ends with a public suffix.

[requinix]

ICANN/IANA also maintains a list of literally the top-level domains. Meaning it lists "uk" but not "co.uk". Doesn't include the IDN versions of the xn-- labels but that's not difficult to deal with in code.

 

Keep in mind that "foo.bar" is a valid domain name - a user could put forward even the slightest bit of effort to circumvent any sort of general-purpose domain name verification you may put in place.

[QuickOldCar]

Want to check if is a protocol, contains a decimal point first, Parse the URL , then end explode it, do an in_array() check in your array of top and generic domains.

 

I have my own list I made including decimal points with top,second and generic domains, didn't feel like editing it so are extra in the array.

<?php
$domains = array(".abogado",".ac",".ac.ae",".ac.cn",".academy",".accountants",".active",".actor",".ad",".ads",".adult",".ae",".aero",".af",".africa",".ag",".agency",".agent",".ah.cn",".ai",".airforce",".ak.us",".al",".al.us",".allfinanz",".alsace",".am",".amsterdam",".an",".android",".ao",".apartments",".app",".aq",".aquarelle",".ar",".ar.us",".arab",".archi",".architect",".army",".arpa",".art",".arts",".as",".asia",".associates",".at",".attorney",".au",".au.com",".auction",".audio",".auto",".autos",".aw",".ax",".axa",".az",".az.us",".b2b",".b2c",".b2m",".ba",".baby",".band",".bank",".bar",".barcelona",".bargains",".baseball",".basketball",".bayern",".bb",".bd",".be",".beauty",".beer",".berlin",".best",".bet",".bf",".bg",".bh",".bi",".bible",".bid",".bike",".bingo",".bio",".biz",".bj",".bj.cn",".bl",".black",".blackfriday",".blog",".bloomberg",".blue",".bm",".bmw",".bn",".bnpparibas",".bo",".boats",".boo",".book",".boutique",".box",".bq",".br",".br.com",".broadway",".broker",".brussels",".bs",".bt",".budapest",".build",".builders",".business",".buy",".buzz",".bv",".bw",".by",".bz",".bzh",".ca",".ca.us",".cab",".cafe",".cal",".cam",".camera",".camp",".cancerresearch",".capetown",".capital",".car",".caravan",".cards",".care",".career",".careers",".cars",".cartier",".casa",".cash",".casino",".cat",".catering",".cc",".cd",".center",".ceo",".cern",".cf",".cg",".ch",".channel",".charity",".chat",".cheap",".christmas",".chrome",".church",".ci",".citic",".city",".ck",".cl",".claims",".cleaning",".click",".clinic",".clothing",".cloud",".club",".cm",".cn",".cn.com",".co",".co.uk",".co.us",".coach",".codes",".coffee",".college",".cologne",".com",".com.ac",".com.au",".com.cn",".com.tw",".community",".company",".computer",".condos",".construction",".consulting",".contractors",".cooking",".cool",".coop",".corp",".corsica",".country",".coupon",".coupons",".cpa",".cq.cn",".cr",".credit",".creditcard",".cricket",".crs",".cruises",".ct.us",".cu",".cuisinella",".cv",".cw",".cx",".cy",".cymru",".cz",".dad",".dance",".data",".date",".dating",".day",".dc.us",".dds",".de",".de.com",".de.net",".de.us",".deal",".deals",".degree",".delivery",".democrat",".dental",".dentist",".desi",".design",".dev",".diamonds",".diet",".digital",".dir",".direct",".directory",".discount",".diy",".dj",".dk",".dk.org",".dm",".dnp",".do",".docs",".doctor",".dog",".domains",".doosan",".durban",".dot",".download",".dubai",".durban",".dvag",".dz",".earth",".eat",".ec",".eco",".edu",".edu.ac",".edu.af",".edu.cn",".education",".ee",".eg",".eh",".email",".emerck",".energy",".engineer",".engineering",".enterprises",".equipment",".er",".es",".estate",".esq",".et",".eu",".eu.com",".eu.org",".eurovision",".eus",".events",".everbank",".exchange",".expert",".exposed",".fail",".faith",".family",".fan",".fans",".farm",".fashion",".feedback",".fi",".film",".final",".finance",".financial",".firm",".firmdale",".fish",".fishing",".fit",".fitness",".fj",".fj.cn",".fk",".fl.us",".flights",".florist",".flowers",".flsmidth",".fly",".fm",".fo",".foo",".food",".football",".forsale",".forum",".foundation",".fr",".free",".frl",".frogans",".fun",".fund",".furniture",".futbol",".fyi",".ga",".ga.us",".gal",".gallery",".game",".games",".garden",".gay",".gb",".gb.com",".gb.net",".gbiz",".gd",".gd.cn",".ge",".gent",".gf",".gg",".ggee",".gh",".gi",".gift",".gifts",".gives",".gl",".glass",".gle",".global",".globo",".gm",".gmail",".gmbh",".gmo",".gmx",".gn",".gold",".golf",".google",".gop",".gov",".gov.ac",".gov.ae",".gov.cn",".gp",".gq",".gr",".graphics",".gratis",".green",".gripe",".group",".gs",".gs.cn",".gt",".gu",".guide",".guitars",".guru",".gw",".gx.cn",".gy",".gz.cn",".ha.cn",".hair",".hamburg",".haus",".hb.cn",".he.cn",".health",".healthcare",".help",".helsinki",".here",".hi.cn",".hi.us",".hiphop",".hiv",".hk",".hl.cn",".hm",".hn",".hn.cn",".hockey",".holdings",".holiday",".home",".homes",".horse",".hospital",".host",".hosting",".hot",".hotel",".house",".how",".hr",".ht",".hu",".hu.com",".ia.us",".ibm",".id",".id.us",".ie",".il",".il.us",".im",".immo",".immobilien",".in",".industries",".in.us",".inc",".indians",".industries",".info",".ing",".ink",".institute",".insurance",".insure",".int",".international",".investments",".io",".iq",".ir",".irish",".is",".it",".iwc",".je",".jetzt",".jl.cn",".jm",".jo",".jobs",".joburg",".jp",".js.cn",".juegos",".jx.cn",".kaufen",".kddi",".ke",".kg",".kh",".ki",".kids",".kim",".kitchen",".kiwi",".km",".kn",".koeln",".kp",".kr",".krd",".kred",".ks.us",".ku",".kw",".ky",".ky.us",".kyoto",".kz",".la",".la.us",".lacaixa",".land",".lat",".latino",".latrobe",".law",".lawyer",".lb",".lc",".lds",".lease",".legal",".lgbt",".li",".lidl",".life",".lighting",".limited",".limo",".link",".live",".living",".lk",".llc",".llp",".ln.cn",".loan",".loans",".lol",".london",".lotto",".love",".lr",".ls",".lt",".ltd",".ltda",".ltd.uk",".lu",".luxe",".luxury",".lv",".ly",".m2c",".m2m",".ma",".madrid",".maison",".mail",".management",".mango",".map",".market",".marketing",".ma.us",".mba",".mc",".md",".md.us",".me",".media",".medical",".meet",".melbourne",".meme",".memorial",".men",".menu",".me.uk",".me.us",".med",".mf",".mg",".mh",".miami",".mi.us",".mil",".mil.ac",".mil.ae",".mil.cn",".mini",".mk",".ml",".mm",".mn",".mo",".mo.us",".mobi",".mobile",".moda",".moe",".mom",".monash",".money",".mormon",".mortgage",".moscow",".moto",".motorcycles",".mov",".movie",".mp",".mq",".mr",".ms",".ms.us",".mt",".mt.us",".mu",".museum",".music",".mv",".mw",".mx",".my",".mz",".na",".nagoya",".name",".navy",".nc",".nc.us",".nd.us",".ne",".ne.us",".net",".network",".neustar",".net.ac",".net.ae",".net.cn",".net.tw",".net.uk",".new",".news",".nexus",".nf",".ng",".ngo",".nh.us",".nhk",".ni",".ninja",".nj.us",".nl",".nm.cn",".nm.us",".no",".no.com",".nom.ad",".now",".np",".nr",".nra",".nrw",".nu",".nv.us",".nx.cn",".ny.us",".nyc",".nz",".oh.us",".ok.us",".okinawa",".om",".one",".ong",".onl",".online",".ooo",".or.us",".org",".organic",".org.ac",".org.ae",".org.cn",".org.tw",".org.uk",".osaka",".otsuka",".ovh",".pa",".pa.us",".paris",".partners",".parts",".party",".pay",".pe",".pet",".pets",".pf",".pg",".ph",".phd",".pharmacy",".phone",".photo",".photography",".photos",".physio",".pics",".pictures",".pid",".ping",".pink",".pizza",".pk",".pl",".place",".play",".plc",".plc.uk",".plumbing",".plus",".pm",".pn",".pohl",".poker",".porn",".post",".pr",".praxi",".press",".pro",".pro.ae",".prod",".productions",".prof",".properties",".property",".ps",".pt",".pub",".pw",".py",".qa",".qc.com",".qh.cn",".qpon",".quebec",".racing",".radio",".re",".realestate",".realtor",".realty",".rec",".recipes",".red",".rehab",".reise",".reisen",".reit",".ren",".rent",".rentals",".repair",".report",".republican",".rest",".restaurant",".review",".reviews",".ri.us",".rich",".rio",".rip",".ro",".rocks",".rodeo",".rs",".rsvp",".ru",".ru.com",".rugby",".ruhr",".run",".rw",".ryukyu",".sa",".saarland",".sale",".salon",".samsung",".sarl",".save",".sa.com",".sb",".sc",".sca",".sc.cn",".sc.us",".scb",".sch.ae",".sch.uk",".schmidt",".school",".schule",".schwarz",".science",".scot",".sd",".sd.cn",".sd.us",".se",".se.com",".search",".services",".sew",".sexy",".sg",".sh",".sh.cn",".shiksha",".shoes",".shop",".shopping",".show",".shriram",".si",".singles",".site",".sj",".sk",".ski",".sl",".sm",".sn",".sn.cn",".so",".soc",".soccer",".social",".software",".sohu",".solar",".solutions",".soy",".spa",".space",".spiegel",".sport",".sports",".spot",".sr",".ss",".st",".store",".stream",".studio",".style",".su",".supplies",".supply",".support",".surf",".surgery",".suzuki",".sv",".swiss",".sx.cn",".sy",".sydney",".systems",".sz",".taipei",".tatar",".tattoo",".tax",".taxi",".tc",".td",".team",".tech",".technology",".tel",".tennis",".tf",".tg",".th",".thai",".theater",".tickets",".tienda",".tips",".tires",".tirol",".tj",".tj.cn",".tk",".tl",".tm",".tn",".tn.us",".to",".today",".tokyo",".tools",".top",".tour",".tours",".town",".toys",".tp",".tr",".trade",".trading",".training",".travel",".trust",".tt",".tube",".tui",".tv",".tw",".tw.cn",".tx.us",".tz",".ua",".ug",".uk",".uk.com",".uk.net",".um",".university",".uno",".uol",".us",".us.com",".ut.us",".uy",".uy.com",".uz",".va",".va.us",".vacations",".vc",".ve",".vegas",".ventures",".versicherung",".vet",".vg",".vi",".viajes",".video",".villas",".vision",".vin",".vip",".vision",".vlaanderen",".vn",".vodka",".vote",".voting",".voto",".voyage",".vt.us",".vu",".wa.us",".wales",".wang",".watch",".web",".webcam",".website",".wed",".wedding",".wf",".whoswho",".wi.us",".wien",".wiki",".williamhill",".win",".wine",".wme",".work",".works",".world",".wow",".ws",".wtc",".wtf",".测试",".परीक्षा",".佛山",".集团",".在线",".한국",".ভারত",".八卦",".موقع",".বাংলা",".公益",".公司",".移动",".我爱你",".москва",".испытание",".қаз",".онлайн",".сайт",".срб",".бел",".테스트",".орг",".삼성",".சிங்கப்பூர்",".商标",".商店",".商城",".дети",".мкд",".טעסט",".中文网",".中信",".中国",".中國",".谷歌",".భారత్",".ලංකා",".測試",".ભારત",".भारत",".آزمایشی",".பரிட்சை",".网店",".संगठन",".网络",".укр",".香港",".δοκιμή",".إختبار",".台湾",".台灣",".手机",".мон",".الجزائر",".عمان",".ایران",".امارات",".بازار",".پاکستان",".الاردن",".بھارت",".المغرب",".السعودية",".سودان",".عراق",".مليسيا",".شبكة",".გე",".机构",".组织机构",".ไทย",".سورية",".рус",".рф",".تونس",".みんな",".グーグル",".世界",".ਭਾਰਤ",".网址",".游戏",".vermögensberater",".vermögensberatung",".企业",".مصر",".قطر",".广东",".இலங்கை",".இந்தியா",".հայ",".新加坡",".فلسطين",".テスト",".政务",".wv.us",".wy.us",".xj.cn",".xxx",".xyz",".xz.cn",".yachts",".yandex",".ye",".yoga",".yokohama",".youtube",".yn.cn",".yt",".yu",".za",".za.com",".zip",".zj.cn",".zm",".zone",".zr",".zuerich",".zw");


function checkUrl($url, $domains)
{
    $url = trim($url);
    if (parse_url($url, PHP_URL_SCHEME) && strpos($url, ".") !== false) {
        $suffix = end(explode(".", $url));
        if (in_array(".$suffix", $domains)) {
            return true;
        } else {
            return false;
        }
        
    } else {
        return false;
    }
}


//usage
$sample_urls = array(
    "http://phpfreaks.com",
    "phpfreaks.com",
    "http://phpfreaks.blah",
    "http://phpfreaks.com.blah"
);

foreach ($sample_urls as $url) {
    if (checkUrl($url, $domains)) {
        echo "<p style='color:green;'> $url </p>";
    } else {
        echo "<p style='color:red;'> $url </p>";
    }
}
?>

[lush_rainforest]

 

Want to check if is a protocol, contains a decimal point first, Parse the URL , then end explode it, do an in_array() check in your array of top and generic domains.

 

I have my own list I made including decimal points with top,second and generic domains, didn't feel like editing it so are extra in the array.

<?php
$domains = array(".abogado",".ac",".ac.ae",".ac.cn",".academy",".accountants",".active",".actor",".ad",".ads",".adult",".ae",".aero",".af",".africa",".ag",".agency",".agent",".ah.cn",".ai",".airforce",".ak.us",".al",".al.us",".allfinanz",".alsace",".am",".amsterdam",".an",".android",".ao",".apartments",".app",".aq",".aquarelle",".ar",".ar.us",".arab",".archi",".architect",".army",".arpa",".art",".arts",".as",".asia",".associates",".at",".attorney",".au",".au.com",".auction",".audio",".auto",".autos",".aw",".ax",".axa",".az",".az.us",".b2b",".b2c",".b2m",".ba",".baby",".band",".bank",".bar",".barcelona",".bargains",".baseball",".basketball",".bayern",".bb",".bd",".be",".beauty",".beer",".berlin",".best",".bet",".bf",".bg",".bh",".bi",".bible",".bid",".bike",".bingo",".bio",".biz",".bj",".bj.cn",".bl",".black",".blackfriday",".blog",".bloomberg",".blue",".bm",".bmw",".bn",".bnpparibas",".bo",".boats",".boo",".book",".boutique",".box",".bq",".br",".br.com",".broadway",".broker",".brussels",".bs",".bt",".budapest",".build",".builders",".business",".buy",".buzz",".bv",".bw",".by",".bz",".bzh",".ca",".ca.us",".cab",".cafe",".cal",".cam",".camera",".camp",".cancerresearch",".capetown",".capital",".car",".caravan",".cards",".care",".career",".careers",".cars",".cartier",".casa",".cash",".casino",".cat",".catering",".cc",".cd",".center",".ceo",".cern",".cf",".cg",".ch",".channel",".charity",".chat",".cheap",".christmas",".chrome",".church",".ci",".citic",".city",".ck",".cl",".claims",".cleaning",".click",".clinic",".clothing",".cloud",".club",".cm",".cn",".cn.com",".co",".co.uk",".co.us",".coach",".codes",".coffee",".college",".cologne",".com",".com.ac",".com.au",".com.cn",".com.tw",".community",".company",".computer",".condos",".construction",".consulting",".contractors",".cooking",".cool",".coop",".corp",".corsica",".country",".coupon",".coupons",".cpa",".cq.cn",".cr",".credit",".creditcard",".cricket",".crs",".cruises",".ct.us",".cu",".cuisinella",".cv",".cw",".cx",".cy",".cymru",".cz",".dad",".dance",".data",".date",".dating",".day",".dc.us",".dds",".de",".de.com",".de.net",".de.us",".deal",".deals",".degree",".delivery",".democrat",".dental",".dentist",".desi",".design",".dev",".diamonds",".diet",".digital",".dir",".direct",".directory",".discount",".diy",".dj",".dk",".dk.org",".dm",".dnp",".do",".docs",".doctor",".dog",".domains",".doosan",".durban",".dot",".download",".dubai",".durban",".dvag",".dz",".earth",".eat",".ec",".eco",".edu",".edu.ac",".edu.af",".edu.cn",".education",".ee",".eg",".eh",".email",".emerck",".energy",".engineer",".engineering",".enterprises",".equipment",".er",".es",".estate",".esq",".et",".eu",".eu.com",".eu.org",".eurovision",".eus",".events",".everbank",".exchange",".expert",".exposed",".fail",".faith",".family",".fan",".fans",".farm",".fashion",".feedback",".fi",".film",".final",".finance",".financial",".firm",".firmdale",".fish",".fishing",".fit",".fitness",".fj",".fj.cn",".fk",".fl.us",".flights",".florist",".flowers",".flsmidth",".fly",".fm",".fo",".foo",".food",".football",".forsale",".forum",".foundation",".fr",".free",".frl",".frogans",".fun",".fund",".furniture",".futbol",".fyi",".ga",".ga.us",".gal",".gallery",".game",".games",".garden",".gay",".gb",".gb.com",".gb.net",".gbiz",".gd",".gd.cn",".ge",".gent",".gf",".gg",".ggee",".gh",".gi",".gift",".gifts",".gives",".gl",".glass",".gle",".global",".globo",".gm",".gmail",".gmbh",".gmo",".gmx",".gn",".gold",".golf",".google",".gop",".gov",".gov.ac",".gov.ae",".gov.cn",".gp",".gq",".gr",".graphics",".gratis",".green",".gripe",".group",".gs",".gs.cn",".gt",".gu",".guide",".guitars",".guru",".gw",".gx.cn",".gy",".gz.cn",".ha.cn",".hair",".hamburg",".haus",".hb.cn",".he.cn",".health",".healthcare",".help",".helsinki",".here",".hi.cn",".hi.us",".hiphop",".hiv",".hk",".hl.cn",".hm",".hn",".hn.cn",".hockey",".holdings",".holiday",".home",".homes",".horse",".hospital",".host",".hosting",".hot",".hotel",".house",".how",".hr",".ht",".hu",".hu.com",".ia.us",".ibm",".id",".id.us",".ie",".il",".il.us",".im",".immo",".immobilien",".in",".industries",".in.us",".inc",".indians",".industries",".info",".ing",".ink",".institute",".insurance",".insure",".int",".international",".investments",".io",".iq",".ir",".irish",".is",".it",".iwc",".je",".jetzt",".jl.cn",".jm",".jo",".jobs",".joburg",".jp",".js.cn",".juegos",".jx.cn",".kaufen",".kddi",".ke",".kg",".kh",".ki",".kids",".kim",".kitchen",".kiwi",".km",".kn",".koeln",".kp",".kr",".krd",".kred",".ks.us",".ku",".kw",".ky",".ky.us",".kyoto",".kz",".la",".la.us",".lacaixa",".land",".lat",".latino",".latrobe",".law",".lawyer",".lb",".lc",".lds",".lease",".legal",".lgbt",".li",".lidl",".life",".lighting",".limited",".limo",".link",".live",".living",".lk",".llc",".llp",".ln.cn",".loan",".loans",".lol",".london",".lotto",".love",".lr",".ls",".lt",".ltd",".ltda",".ltd.uk",".lu",".luxe",".luxury",".lv",".ly",".m2c",".m2m",".ma",".madrid",".maison",".mail",".management",".mango",".map",".market",".marketing",".ma.us",".m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function checkUrl($url, $domains)
{
    $url = trim($url);
    if (parse_url($url, PHP_URL_SCHEME) && strpos($url, ".") !== false) {
        $suffix = end(explode(".", $url));
        if (in_array(".$suffix", $domains)) {
            return true;
        } else {
            return false;
        }
        
    } else {
        return false;
    }
}


//usage
$sample_urls = array(
    "http://phpfreaks.com",
    "phpfreaks.com",
    "http://phpfreaks.blah",
    "http://phpfreaks.com.blah"
);

foreach ($sample_urls as $url) {
    if (checkUrl($url, $domains)) {
        echo "<p style='color:green;'> $url </p>";
    } else {
        echo "<p style='color:red;'> $url </p>";
    }
}
?>

 

I really love the idea. However it looks like this code will produce an error. I am thinking it's because you might have to use end and explode on seperate lines. Like

$suffix = explode(".", $url);
$suffix = end($suffix);

I have no idea why this happens, but it just does.

Edited September 28, 2015 by lush_rainforest

[requinix]

I have no idea why this happens, but it just does.

It's because end() wants to modify internal information about an array, so it needs to be passed a variable and by reference. If the function returned an array by reference, that would work too.

A combination of strrpos and substr will work for a one-liner too.