+// Function taken from user comments on www.php.net / function eregi()
+function isUrlValid ($url) {
+ // Prepare URL
+ $url = strip_tags(str_replace("\\", "", compileUriCode(urldecode($url))));
+
+ // Allows http and https
+ $http = "(http|https)+(:\/\/)";
+ // Test domain
+ $domain1 = "([[:alnum:]]([-[:alnum:]])*\.)?([[:alnum:]][-[:alnum:]\.]*[[:alnum:]])(\.[[:alpha:]]{2,5})?";
+ // Test double-domains (e.g. .de.vu)
+ $domain2 = "([-[:alnum:]])?(\.[[:alnum:]][-[:alnum:]\.]*[[:alnum:]])(\.[[:alpha:]]{2,5})(\.[[:alpha:]]{2,5})?";
+ // Test IP number
+ $ip = "([[:digit:]]{1,3})\.([[:digit:]]{1,3})\.([[:digit:]]{1,3})\.([[:digit:]]{1,3})";
+ // ... directory
+ $dir = "((/)+([-_\.[:alnum:]])+)*";
+ // ... page
+ $page = "/([-_[:alnum:]][-\._[:alnum:]]*\.[[:alnum:]]{2,5})?";
+ // ... and the string after and including question character
+ $getstring1 = "([\?/]([[:alnum:]][-\._%[:alnum:]]*(=)?([-\@\._:%[:alnum:]])+)(&([[:alnum:]]([-_%[:alnum:]])*(=)?([-\@\[\._:%[:alnum:]])+(\])*))*)?";
+ // Pattern for URLs like http://url/dir/doc.html?var=value
+ $pattern['d1dpg1'] = $http.$domain1.$dir.$page.$getstring1;
+ $pattern['d2dpg1'] = $http.$domain2.$dir.$page.$getstring1;
+ $pattern['ipdpg1'] = $http.$ip.$dir.$page.$getstring1;
+ // Pattern for URLs like http://url/dir/?var=value
+ $pattern['d1dg1'] = $http.$domain1.$dir."/".$getstring1;
+ $pattern['d2dg1'] = $http.$domain2.$dir."/".$getstring1;
+ $pattern['ipdg1'] = $http.$ip.$dir."/".$getstring1;
+ // Pattern for URLs like http://url/dir/page.ext
+ $pattern['d1dp'] = $http.$domain1.$dir.$page;
+ $pattern['d1dp'] = $http.$domain2.$dir.$page;
+ $pattern['ipdp'] = $http.$ip.$dir.$page;
+ // Pattern for URLs like http://url/dir
+ $pattern['d1d'] = $http.$domain1.$dir;
+ $pattern['d2d'] = $http.$domain2.$dir;
+ $pattern['ipd'] = $http.$ip.$dir;
+ // Pattern for URLs like http://url/?var=value
+ $pattern['d1g1'] = $http.$domain1."/".$getstring1;
+ $pattern['d2g1'] = $http.$domain2."/".$getstring1;
+ $pattern['ipg1'] = $http.$ip."/".$getstring1;
+ // Pattern for URLs like http://url?var=value
+ $pattern['d1g12'] = $http.$domain1.$getstring1;
+ $pattern['d2g12'] = $http.$domain2.$getstring1;
+ $pattern['ipg12'] = $http.$ip.$getstring1;
+ // Test all patterns
+ $reg = false;
+ foreach ($pattern as $key=>$pat) {
+ // Debug regex?
+ if (defined('DEBUG_REGEX')) {
+ $pat = str_replace("[:alnum:]", "0-9a-zA-Z", $pat);
+ $pat = str_replace("[:alpha:]", "a-zA-Z", $pat);
+ $pat = str_replace("[:digit:]", "0-9", $pat);
+ $pat = str_replace(".", "\.", $pat);
+ $pat = str_replace("@", "\@", $pat);
+ echo $key."= ".$pat."<br />";
+ }