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<?php
/*
About validateUrlSyntax():
This function will verify if a http URL is formatted properly, returning
either with true or false.
I used rfc #2396 URI: Generic Syntax as my guide when creating the
regular expression. For all the details see the comments below.
Usage:
validateUrlSyntax( url_to_check[, options])
url_to_check - string - The url to check
options - string - A optional string of options to set which parts of
the url are required, optional, or not allowed. Each option
must be followed by a "+" for required, "?" for optional, or
"-" for not allowed.
s - Scheme. Allows "+?-", defaults to "s?"
H - http:// Allows "+?-", defaults to "H?"
S - https:// (SSL). Allows "+?-", defaults to "S?"
E - mailto: (email). Allows "+?-", defaults to "E-"
F - ftp:// Allows "+?-", defaults to "F-"
Dependant on scheme being enabled
u - User section. Allows "+?-", defaults to "u?"
P - Password in user section. Allows "+?-", defaults to "P?"
Dependant on user section being enabled
a - Address (ip or domain). Allows "+?-", defaults to "a+"
I - Ip address. Allows "+?-", defaults to "I?"
If I+, then domains are disabled
If I-, then domains are required
Dependant on address being enabled
p - Port number. Allows "+?-", defaults to "p?"
f - File path. Allows "+?-", defaults to "f?"
q - Query section. Allows "+?-", defaults to "q?"
r - Fragment (anchor). Allows "+?-", defaults to "r?"
Paste the funtion code, or include_once() this template at the top of the page
you wish to use this function.
Examples:
validateUrlSyntax('http://george@www.cnn.com/#top')
validateUrlSyntax('https://games.yahoo.com:8080/board/chess.htm?move=true')
validateUrlSyntax('http://www.hotmail.com/', 's+u-I-p-q-r-')
validateUrlSyntax('/directory/file.php#top', 's-u-a-p-f+')
if (validateUrlSyntax('http://www.canowhoopass.com/', 'u-'))
{
echo 'URL SYNTAX IS VERIFIED';
} else {
echo 'URL SYNTAX IS ILLEGAL';
}
Last Edited:
December 15th 2004
Changelog:
December 15th 2004
-Added new TLD's - .jobs, .mobi, .post and .travel. They are official, but not yet active.
August 31th 2004
-Fixed bug allowing empty username even when it was required
-Changed and added a few options to add extra schemes
-Added mailto: ftp:// and http:// options
-https option was 'l' now it is 'S' (capital)
-Added password option. Now passwords can be disabled while usernames are ok (for email)
-IP Address option was 'i' now it is 'I' (capital)
-Options are now case sensitive
-Added validateEmailSyntax() and validateFtpSyntax() functions below<br>
August 27th, 2004
-IP group range is more specific. Used to allow 0-299. Now it is 0-255
-Port range more specific. Used to allow 0-69999. Now it is 0-65535<br>
-Fixed bug disallowing 'i-' option.<br>
-Changed license to GPL
July 8th, 2004
-Fixed bug disallowing 'l-' option. Thanks Dr. Cheap
June 15, 2004
-Added options parameter to make it easier for people to plug the function in
without needed to rework the code.
-Split the example application away from the function
June 1, 2004
-Complete rewrite
-Now more modular
-Easier to disable sections
-Easier to port to other languages
-Easier to port to verify email addresses
-Uses only simple regular expressions so it is more portable
-Follows RFC closer for domain names. Some "play" domains may break
-Renamed from 'verifyUrl()' to 'validateUrlSyntax()'
-Removed extra code which added 'http://' and trailing '/' if it was missing
-That code was better suited for a massaging function, not verifying
-Bug fixes:
-Now splits up and forces '/path?query#fragment' order
-No longer requires a path when using a query or fragment
August 29, 2003
-Allowed port numbers above 9999. Now allows up to 69999
Sometime, 2002
-Added new top level domains
-aero, coop, museum, name, info, biz, pro
October 5, 2000
-First Version
Intentional Limitations:
-Does not verify url actually exists. Only validates the syntax
-Strictly follows the RFC standards. Some urls exist in the wild which will
not validate. Including ones with square brackets in the query section '[]'
Known Problems:
-None at this time
Author(s):
Rod Apeldoorn - rod(at)canowhoopass(dot)com
Homepage:
http://www.canowhoopass.com/
Thanks!:
-WEAV -Several members of Weav helped to test - http://weav.bc.ca/
-There were also a number of emails from other developers expressing
thanks and suggestions. It is nice to be appreciated. Thanks!
License:
Copyright 2004, Rod Apeldoorn
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
To view the license online, go to: http://www.gnu.org/copyleft/gpl.html
Alternate Commercial Licenses:
For information in regards to alternate licensing, contact me.
*/
// BEGINNING OF validateUrlSyntax() function
function validateUrlSyntax( $urladdr, $options="" ){
// Force Options parameter to be lower case
// DISABLED PERMAMENTLY - OK to remove from code
// $options = strtolower($options);
// Check Options Parameter
if (!ereg( '^([sHSEFuPaIpfqr][+?-])*$', $options ))
{
trigger_error("Options attribute malformed", E_USER_ERROR);
}
// Set Options Array, set defaults if options are not specified
// Scheme
if (strpos( $options, 's') === false) $aOptions['s'] = '?';
else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);
// http://
if (strpos( $options, 'H') === false) $aOptions['H'] = '?';
else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);
// https:// (SSL)
if (strpos( $options, 'S') === false) $aOptions['S'] = '?';
else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);
// mailto: (email)
if (strpos( $options, 'E') === false) $aOptions['E'] = '-';
else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);
// ftp://
if (strpos( $options, 'F') === false) $aOptions['F'] = '-';
else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);
// User section
if (strpos( $options, 'u') === false) $aOptions['u'] = '?';
else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);
// Password in user section
if (strpos( $options, 'P') === false) $aOptions['P'] = '?';
else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);
// Address Section
if (strpos( $options, 'a') === false) $aOptions['a'] = '+';
else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);
// IP Address in address section
if (strpos( $options, 'I') === false) $aOptions['I'] = '?';
else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);
// Port number
if (strpos( $options, 'p') === false) $aOptions['p'] = '?';
else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);
// File Path
if (strpos( $options, 'f') === false) $aOptions['f'] = '?';
else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);
// Query Section
if (strpos( $options, 'q') === false) $aOptions['q'] = '?';
else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);
// Fragment (Anchor)
if (strpos( $options, 'r') === false) $aOptions['r'] = '?';
else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);
// Loop through options array, to search for and replace "-" to "{0}" and "+" to ""
foreach($aOptions as $key => $value)
{
if ($value == '-')
{
$aOptions[$key] = '{0}';
}
if ($value == '+')
{
$aOptions[$key] = '';
}
}
// DEBUGGING - Unescape following line to display to screen current option values
// echo '<pre>'; print_r($aOptions); echo '</pre>';
// Preset Allowed Characters
$alphanum = '[a-zA-Z0-9]'; // Alpha Numeric
$unreserved = '[a-zA-Z0-9_.!~*' . '\'' . '()-]';
$escaped = '(%[0-9a-fA-F]{2})'; // Escape sequence - In Hex - %6d would be a 'm'
$reserved = '[;/?:@&=+$,]'; // Special characters in the URI
// Beginning Regular Expression
// Scheme - Allows for 'http://', 'https://', 'mailto:', or 'ftp://'
$scheme = '(';
if ($aOptions['H'] === '') { $scheme .= 'http://'; }
elseif ($aOptions['S'] === '') { $scheme .= 'https://'; }
elseif ($aOptions['E'] === '') { $scheme .= 'mailto:'; }
elseif ($aOptions['F'] === '') { $scheme .= 'ftp://'; }
else
{
if ($aOptions['H'] === '?') { $scheme .= '|(http://)'; }
if ($aOptions['S'] === '?') { $scheme .= '|(https://)'; }
if ($aOptions['E'] === '?') { $scheme .= '|(mailto:)'; }
if ($aOptions['F'] === '?') { $scheme .= '|(ftp://)'; }
$scheme = str_replace('(|', '(', $scheme); // fix first pipe
}
$scheme .= ')' . $aOptions['s'];
// End setting scheme
// User Info - Allows for 'username@' or 'username:password@'. Note: contrary to rfc, I removed ':' from username section, allowing it only in password.
// /---------------- Username -----------------------\ /-------------------------------- Password ------------------------------\
$userinfo = '((' . $unreserved . '|' . $escaped . '|[;&=+$,]' . ')+(:(' . $unreserved . '|' . $escaped . '|[;:&=+$,]' . ')+)' . $aOptions['P'] . '@)' . $aOptions['u'];
// IP ADDRESS - Allows 0.0.0.0 to 255.255.255.255
$ipaddress = '((((2(([0-4][0-9])|(5[0-5])))|([01]?[0-9]?[0-9]))\.){3}((2(([0-4][0-9])|(5[0-5])))|([01]?[0-9]?[0-9])))';
// Tertiary Domain(s) - Optional - Multi - Although some sites may use other characters, the RFC says tertiary domains have the same naming restrictions as second level domains
$domain_tertiary = '(' . $alphanum . '(([a-zA-Z0-9-]{0,62})' . $alphanum . ')?\.)*';
// Second Level Domain - Required - First and last characters must be Alpha-numeric. Hyphens are allowed inside.
$domain_secondary = '(' . $alphanum . '(([a-zA-Z0-9-]{0,62})' . $alphanum . ')?\.)';
/* // This regex is disabled on purpose in favour of the more exact version below
// Top Level Domain - First character must be Alpha. Last character must be AlphaNumeric. Hyphens are allowed inside.
$domain_toplevel = '([a-zA-Z](([a-zA-Z0-9-]*)[a-zA-Z0-9])?)';
*/
// Top Level Domain - Required - Domain List Current As Of December 2004. Use above escaped line to be forgiving of possible future TLD's
$domain_toplevel = '(aero|biz|com|coop|edu|gov|info|int|jobs|mil|mobi|museum|name|net|org|post|pro|travel|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|az|ax|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)';
// Address can be IP address or Domain
if ($aOptions['I'] === '{0}') { // IP Address Not Allowed
$address = '(' . $domain_tertiary . $domain_secondary . $domain_toplevel . ')';
} elseif ($aOptions['I'] === '') { // IP Address Required
$address = '(' . $ipaddress . ')';
} else { // IP Address Optional
$address = '((' . $ipaddress . ')|(' . $domain_tertiary . $domain_secondary . $domain_toplevel . '))';
}
$address = $address . $aOptions['a'];
// Port Number - :80 or :8080 or :65534 Allows range of :0 to :65535
// (0-59999) |(60000-64999) |(65000-65499) |(65500-65529) |(65530-65535)
$port_number = '(:(([0-5]?[0-9]{1,4})|(6[0-4][0-9]{3})|(65[0-4][0-9]{2})|(655[0-2][0-9])|(6553[0-5])))' . $aOptions['p'];
// Path - Can be as simple as '/' or have multiple folders and filenames
$path = '(/((;)?(' . $unreserved . '|' . $escaped . '|' . '[:@&=+$,]' . ')+(/)?)*)' . $aOptions['f'];
// Query Section - Accepts ?var1=value1&var2=value2 or ?2393,1221 and much more
$querystring = '(\?(' . $reserved . '|' . $unreserved . '|' . $escaped . ')*)' . $aOptions['q'];
// Fragment Section - Accepts anchors such as #top
$fragment = '(#(' . $reserved . '|' . $unreserved . '|' . $escaped . ')*)' . $aOptions['r'];
// Building Regular Expression
$regexp = '^' . $scheme . $userinfo . $address . $port_number . $path . $querystring . $fragment . '$';
// DEBUGGING - Uncomment Line Below To Display The Regular Expression Built
// echo '<pre>' . htmlentities(wordwrap($regexp,70,"\n",1)) . '</pre>';
// Running the regular expression
if (eregi( $regexp, $urladdr ))
{
return true; // The domain passed
}
else
{
return false; // The domain didn't pass the expression
}
} // END Function validateUrlSyntax()
/*
About ValidateEmailSyntax():
This function uses the ValidateUrlSyntax() function to easily check the
syntax of an email address. It accepts the same options as ValidateURLSyntax
but defaults them for email addresses.
Usage:
validateEmailSyntax( url_to_check[, options])
url_to_check - string - The url to check
options - string - A optional string of options to set which parts of
the url are required, optional, or not allowed. Each option
must be followed by a "+" for required, "?" for optional, or
"-" for not allowed. See ValidateUrlSyntax() docs for option list.
The default options are changed to:
s-H-S-E+F-u+P-a+I-p-f-q-r-
This only allows an address of "name@domain".
Examples:
validateEmailSyntax('george@fakemail.com')
validateEmailSyntax('mailto:george@fakemail.com', 's+')
validateEmailSyntax('george@fakemail.com?subject=Hi%20George', 'q?')
validateEmailSyntax('george@212.198.33.12', 'I?')
Author(s):
Rod Apeldoorn - rod(at)canowhoopass(dot)com
Homepage:
http://www.canowhoopass.com/
License:
Copyright 2004 - Rod Apeldoorn
Released under same license as validateUrlSyntax(). For details, contact me.
*/
function validateEmailSyntax( $emailaddr, $options="" ){
// Check Options Parameter
if (!ereg( '^([sHSEFuPaIpfqr][+?-])*$', $options ))
{
trigger_error("Options attribute malformed", E_USER_ERROR);
}
// Set Options Array, set defaults if options are not specified
// Scheme
if (strpos( $options, 's') === false) $aOptions['s'] = '-';
else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);
// http://
if (strpos( $options, 'H') === false) $aOptions['H'] = '-';
else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);
// https:// (SSL)
if (strpos( $options, 'S') === false) $aOptions['S'] = '-';
else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);
// mailto: (email)
if (strpos( $options, 'E') === false) $aOptions['E'] = '?';
else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);
// ftp://
if (strpos( $options, 'F') === false) $aOptions['F'] = '-';
else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);
// User section
if (strpos( $options, 'u') === false) $aOptions['u'] = '+';
else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);
// Password in user section
if (strpos( $options, 'P') === false) $aOptions['P'] = '-';
else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);
// Address Section
if (strpos( $options, 'a') === false) $aOptions['a'] = '+';
else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);
// IP Address in address section
if (strpos( $options, 'I') === false) $aOptions['I'] = '-';
else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);
// Port number
if (strpos( $options, 'p') === false) $aOptions['p'] = '-';
else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);
// File Path
if (strpos( $options, 'f') === false) $aOptions['f'] = '-';
else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);
// Query Section
if (strpos( $options, 'q') === false) $aOptions['q'] = '-';
else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);
// Fragment (Anchor)
if (strpos( $options, 'r') === false) $aOptions['r'] = '-';
else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);
// Generate options
$newoptions = '';
foreach($aOptions as $key => $value)
{
$newoptions .= $key . $value;
}
// DEBUGGING - Uncomment line below to display generated options
// echo '<pre>' . $newoptions . '</pre>';
// Send to validateUrlSyntax() and return result
return validateUrlSyntax( $emailaddr, $newoptions);
} // END Function validateEmailSyntax()
/*
About ValidateFtpSyntax():
This function uses the ValidateUrlSyntax() function to easily check the
syntax of an FTP address. It accepts the same options as ValidateURLSyntax
but defaults them for FTP addresses.
Usage:
validateFtpSyntax( url_to_check[, options])
url_to_check - string - The url to check
options - string - A optional string of options to set which parts of
the url are required, optional, or not allowed. Each option
must be followed by a "+" for required, "?" for optional, or
"-" for not allowed. See ValidateUrlSyntax() docs for option list.
The default options are changed to:
s?H-S-E-F+u?P?a+I?p?f?q-r-
Examples:
validateFtpSyntax('ftp://netscape.com')
validateFtpSyntax('moz:iesucks@netscape.com')
validateFtpSyntax('ftp://netscape.com:2121/browsers/ns7/', 'u-')
Author(s):
Rod Apeldoorn - rod(at)canowhoopass(dot)com
Homepage:
http://www.canowhoopass.com/
License:
Copyright 2004 - Rod Apeldoorn
Released under same license as validateUrlSyntax(). For details, contact me.
*/
function validateFtpSyntax( $ftpaddr, $options="" ){
// Check Options Parameter
if (!ereg( '^([sHSEFuPaIpfqr][+?-])*$', $options ))
{
trigger_error("Options attribute malformed", E_USER_ERROR);
}
// Set Options Array, set defaults if options are not specified
// Scheme
if (strpos( $options, 's') === false) $aOptions['s'] = '?';
else $aOptions['s'] = substr( $options, strpos( $options, 's') + 1, 1);
// http://
if (strpos( $options, 'H') === false) $aOptions['H'] = '-';
else $aOptions['H'] = substr( $options, strpos( $options, 'H') + 1, 1);
// https:// (SSL)
if (strpos( $options, 'S') === false) $aOptions['S'] = '-';
else $aOptions['S'] = substr( $options, strpos( $options, 'S') + 1, 1);
// mailto: (email)
if (strpos( $options, 'E') === false) $aOptions['E'] = '-';
else $aOptions['E'] = substr( $options, strpos( $options, 'E') + 1, 1);
// ftp://
if (strpos( $options, 'F') === false) $aOptions['F'] = '+';
else $aOptions['F'] = substr( $options, strpos( $options, 'F') + 1, 1);
// User section
if (strpos( $options, 'u') === false) $aOptions['u'] = '?';
else $aOptions['u'] = substr( $options, strpos( $options, 'u') + 1, 1);
// Password in user section
if (strpos( $options, 'P') === false) $aOptions['P'] = '?';
else $aOptions['P'] = substr( $options, strpos( $options, 'P') + 1, 1);
// Address Section
if (strpos( $options, 'a') === false) $aOptions['a'] = '+';
else $aOptions['a'] = substr( $options, strpos( $options, 'a') + 1, 1);
// IP Address in address section
if (strpos( $options, 'I') === false) $aOptions['I'] = '?';
else $aOptions['I'] = substr( $options, strpos( $options, 'I') + 1, 1);
// Port number
if (strpos( $options, 'p') === false) $aOptions['p'] = '?';
else $aOptions['p'] = substr( $options, strpos( $options, 'p') + 1, 1);
// File Path
if (strpos( $options, 'f') === false) $aOptions['f'] = '?';
else $aOptions['f'] = substr( $options, strpos( $options, 'f') + 1, 1);
// Query Section
if (strpos( $options, 'q') === false) $aOptions['q'] = '-';
else $aOptions['q'] = substr( $options, strpos( $options, 'q') + 1, 1);
// Fragment (Anchor)
if (strpos( $options, 'r') === false) $aOptions['r'] = '-';
else $aOptions['r'] = substr( $options, strpos( $options, 'r') + 1, 1);
// Generate options
$newoptions = '';
foreach($aOptions as $key => $value)
{
$newoptions .= $key . $value;
}
// DEBUGGING - Uncomment line below to display generated options
// echo '<pre>' . $newoptions . '</pre>';
// Send to validateUrlSyntax() and return result
return validateUrlSyntax( $ftpaddr, $newoptions);
} // END Function validateFtpSyntax()
?>
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