How do you check the url is valid or not in php?

In this post we will show you different method for test url, URL is exist or not exist(broken url or not).

Table of Contents Show

How can I check if a URL is valid in PHP?
How do you check if a URL is valid or not?
How validate URL in PHP regex?
How can I get current URL in PHP?

Method 1 :

This is very fast method to test your url by using filter_var($your_url, FILTER_VALIDATE_URL); function.

NOTE : FILTER_VALIDATE_URL will not validate for like url hase the protocol ssh://, ftp:// etc..

Example:

// add your url.
$your_url  = "http://www.onlinecode";

if (filter_var($your_url, FILTER_VALIDATE_URL) === FALSE) {
// broken url.
echo ('Not a valid URL');
}
else
{
// Not broken url.
echo ('valid URL');
}

Method 2 :

If we have to check image, pdf, txt or other type of url at that this method will help you lost. In this method we use fopen with rad methods and check any result is available.

Example:

$url_handle = @fopen('http://www.onlinecode.org/example/www-onlinecode-org-image-test.png','r');

if(!$url_handle)
{
// broken url.
echo ('Not a valid URL');
}
else
{
// Not broken url.
echo ('valid URL');
}

Method 3 :

In this method we use file_get_contents and check url exist or not. In this method, It is also work for image, pdf, txt or other type of url.

Example:

function check_url_exists($your_url)
{
if (@file_get_contents($your_url,false,NULL,0,1))
{
return true;
}
return false;
}

// add your url.
$your_url  = "http://www.onlinecode";

var_dump (check_url_exists($your_url));

Method 3 :

In this method we use curl it will work for any type of url.

// add your url.
$your_url  = "http://www.onlinecode.org/example/www-onlinecode-org-image-test.png";

$connection = curl_init();
curl_setopt($connection, CURLOPT_URL, $your_url); // add url
curl_setopt($connection, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($connection, CURLOPT_FOLLOWLOCATION, 1);
$curl_result = curl_exec($connection);
$curl_info   = curl_getinfo($connection);
if($curl_info['http_code'] == 404)
{
// broken url.
echo ('Not a valid URL');
}
else
{
// Not broken url.
echo ('valid URL');
}

Method 4 :

This Method is advance for find url exist or not with HTTP status codes. In this method, it will show you result why url is not exist with HTTP status codes, example for 404 page not found.

function check_url_exists($your_url, array $set_options = array()) {
    if (empty($your_url)) {
        throw new Exception('URL is empty');
    }


    // list of HTTP status codes
    $http_status_codes = array(
        100 => 'Continue', // status codes 100
        101 => 'Switching Protocols', // status codes 101
        102 => 'Processing', // status codes 102
        200 => 'OK', // status codes 200
        201 => 'Created', // status codes 201
        202 => 'Accepted', // status codes 202
        203 => 'Non-Authoritative Information', // status codes 203
        204 => 'No Content', // status codes 204
        205 => 'Reset Content', // status codes 205
        206 => 'Partial Content', // status codes 206
        207 => 'Multi-Status', // status codes 207
        208 => 'Already Reported', // status codes 208
        226 => 'IM Used', // status codes 226
        300 => 'Multiple Choices', // status codes 300
        301 => 'Moved Permanently', // status codes 301
        302 => 'Found', // status codes 302
        303 => 'See Other', // status codes 303
        304 => 'Not Modified', // status codes 304
        305 => 'Use Proxy', // status codes 305
        306 => 'Switch Proxy', // status codes 306
        307 => 'Temporary Redirect', // status codes 307
        308 => 'Permanent Redirect', // status codes 308
        400 => 'Bad Request', // status codes 400
        401 => 'Unauthorized', // status codes 401
        402 => 'Payment Required', // status codes 402
        403 => 'Forbidden', // status codes 403
        404 => 'Not Found', // status codes 404
        405 => 'Method Not Allowed', // status codes 405
        406 => 'Not Acceptable', // status codes 406
        407 => 'Proxy Authentication Required', // status codes 407
        408 => 'Request Timeout', // status codes 408
        409 => 'Conflict', // status code 409
        410 => 'Gone', // status codes 410
        411 => 'Length Required', // status codes 411
        412 => 'Precondition Failed', // status codes 412
        413 => 'Payload Too Large', // status codes 413
        414 => 'Request-URI Too Long', // status codes 414
        415 => 'Unsupported Media Type', // status codes 415
        416 => 'Requested Range Not Satisfiable', // status codes 416
        417 => 'Expectation Failed', // status codes 417
        418 => 'I\'m a teapot', // status codes 418
        422 => 'Unprocessable Entity', // status codes 422
        423 => 'Locked', // status codes 423
        424 => 'Failed Dependency', // status codes 424
        425 => 'Unordered Collection', // status codes 425
        426 => 'Upgrade Required', // status codes 426
        428 => 'Precondition Required', // status codes 428
        429 => 'Too Many Requests', // status codes 429
        431 => 'Request Header Fields Too Large', // status codes 431
        449 => 'Retry With', // status codes 449
        450 => 'Blocked by Windows Parental Controls', // status codes 450
        500 => 'Internal Server Error', // status codes 500
        501 => 'Not Implemented', // status codes 501
        502 => 'Bad Gateway', // status codes 502
        503 => 'Service Unavailable', // status codes 503
        504 => 'Gateway Timeout', // status codes 504
        505 => 'HTTP Version Not Supported', // status codes 505
        506 => 'Variant Also Negotiates', // status codes 506
        507 => 'Insufficient Storage', // status codes 507
        508 => 'Loop Detected', // status codes 508
        509 => 'Bandwidth Limit Exceeded', // status codes 509
        510 => 'Not Extended', // status codes 510
        511 => 'Network Authentication Required',  // status codes 511
        599 => 'Network Connect Timeout Error' // status codes 599
    );

    $result_return = "";
    $connection = curl_init($your_url);
    curl_setopt($connection, CURLOPT_NOBODY, true);
    curl_setopt($connection, CURLOPT_FOLLOWLOCATION, true);

    if (isset($set_options['timeout'])) {
        $timeout = (int) $set_options['timeout'];
        curl_setopt($connection, CURLOPT_TIMEOUT, $timeout);
    }

    curl_exec($connection);
    $returned_status_code = curl_getinfo($connection, CURLINFO_HTTP_CODE);
    curl_close($connection);

    if (array_key_exists($returned_status_code, $http_status_codes)) {
        $result_return = " URL : '{$your_url}' - Error code: {$returned_status_code} - Definition: {$http_status_codes[$returned_status_code]}";
    } else {
        $result_return = "'{$your_url}' does not exist";
    }
    return $result_return;
}

// add your url.
$your_url  = "http://www.onlinecode";

var_dump (check_url_exists($your_url));
Method 5 :
function check_url($test_url) {
    $ch_init = curl_init();
    curl_setopt($ch_init, CURLOPT_URL, $test_url);
    curl_setopt($ch_init, CURLOPT_HEADER, 1);
    curl_setopt($ch_init , CURLOPT_RETURNTRANSFER, 1);
    $data = curl_exec($ch_init);
    $headers_result = curl_getinfo($ch_init);
    curl_close($ch_init);

    return $headers_result['http_code'];
}

$test_url = "http://onlinecode";
$check_url_result = check_broken_url($test_url);
if ($check_url_result == '200')
{
	echo "This is Working Link.";
}
else
{
	echo "This is Broken Link.";
}

How can I check if a URL is valid in PHP?

PHP FILTER_VALIDATE_URL Filter.

Example. Check if the variable $url is a valid URL: $url = "https://www.w3schools.com"; ... .

Example 1. First remove all illegal characters from the $url variable, then check if it is a valid URL: ... .

Example 2. Here, the URL is required to have a query string to be valid:.

How do you check if a URL is valid or not?

You can use the URLConstructor to check if a string is a valid URL. URLConstructor ( new URL(url) ) returns a newly created URL object defined by the URL parameters. A JavaScript TypeError exception is thrown if the given URL is not valid.

How validate URL in PHP regex?

Use the filter_var() function to validate whether a string is URL or not: var_dump(filter_var('example.com', FILTER_VALIDATE_URL)); It is bad practice to use regular expressions when not necessary.

How can I get current URL in PHP?

To get the current page URL, PHP provides a superglobal variable $_SERVER. The $_SERVER is a built-in variable of PHP, which is used to get the current page URL. It is a superglobal variable, means it is always available in all scope.