Validate Full URL

[benphelps]

I have a function that can validate a URL like this: "http://www.example.com" and all the variations.

 

I cant figure out how to validate aFull URL like this:

 

http://www.newegg.com/Product/Product.aspx?Item=N82E16819115044

 

How can I validate that URL ?

 

Here is what I have now:

 

function is_valid_url($url) { 
  $pattern = "#^(http:\/\/|https:\/\/|www\.)(([A-Z0-9][A-Z0-9_-]*)(\.[A-Z0-9][A-Z0-9_-]*)+)(\d+))?(\/)*$#i"; 
  if (!preg_match($pattern, $url)) { 
    return false; 
  } else { 
    return true; 
  } 
}

[flyhoney]

You could ping the url   Uses more resources however.  Here is a class I wrote to check the status of a url:

 

<?php
$url = new UrlInfo('http://www.google.com/intl/en_ALL/images/logo.gif');
if ($url->getStatus() == 200) {
    echo "url is valid";
} else {
    echo "url returned a status: " . $url->getStatus();
}
?>

 

<?php
class UrlInfo {

private $url;
private $headers;
private $status;

public function __construct($url = '') {
	$this->url = $url;

	// fetch headers for url
	if ($this->url) {
		$this->headers = @get_headers($this->url, 1);
		if (!$this->headers) {
			$this->headers = array();
		} else {
			$this->getStatus();
		}
	}
}

public function getUrl() {
	return $this->url;
}

public function getHeaders() {
	return $this->headers;
}

public function getHeader($key) {
	if (isset($this->headers[$key])) {
		return $this->headers[$key];
	} else {
		return '';
	}
}

public function getStatus() {

	if (!$this->status) {

		// status looks something like this HTTP/1.0 200 OK
		$status = trim(end(explode(' ', $this->headers[0], 2)));

		switch ($status) {
			// a successful response from the server
			case '200 OK':
				$this->status = 200;
				break;

			// permanent redirection
			case '301 Moved permanently':
				$this->status = 301;
				break;

			// common way of performing a redirection
			case '302 Found':
				$this->status = 302;
				break;

			// redirection
			case '303 See Other':
				$this->status = 303;
				break;

			// server doesn't grant access to what was requested
			case '403 Forbidden':
				$this->status = 403;
				break;

			// server could not find what was requested
			case '404 Not Found':
			default: 
				$this->status = 404;
		}
	}
	return $this->status;
}

}
?>