%PDF- %PDF-
| Direktori : /data/www_bck/varak.net_bck/gnufm.varak.net/utils/ |
| Current File : //data/www_bck/varak.net_bck/gnufm.varak.net/utils/licenses.php |
<?php
define('BY1', 1);
define('BY2', 2);
define('BY21', 3);
define('BY25', 4);
define('BY3', 5);
define('BYSA1', 6);
define('BYSA2', 7);
define('BYSA21', 8);
define('BYSA25', 9);
define('BYSA3', 10);
define('LAL', 11);
define('PD', 12);
define('CC0', 13);
// Arrays containing regular expressions for each license type
// (so we can support multiple URL formats in the future if needed)
$by1 = array('http://creativecommons.org/licenses/by/1.0/?.*');
$by2 = array('http://creativecommons.org/licenses/by/2.0/?.*');
$by21 = array('http://creativecommons.org/licenses/by/2.1/?.*');
$by25 = array('http://creativecommons.org/licenses/by/2.5/?.*');
$by3 = array('http://creativecommons.org/licenses/by/3.0/?.*');
$bysa1 = array('http://creativecommons.org/licenses/by-sa/1.0/?.*');
$bysa2 = array('http://creativecommons.org/licenses/by-sa/2.0/?.*');
$bysa21 = array('http://creativecommons.org/licenses/by-sa/2.1/?.*');
$bysa25 = array('http://creativecommons.org/licenses/by-sa/2.5/?.*');
$bysa3 = array('http://creativecommons.org/licenses/by-sa/3.0/?.*');
$lal = array('http://artlibre.org/licence.php/lal.html');
$pd = array('http://creativecommons.org/licenses/publicdomain/?.*');
$cc0 = array('http://creativecommons.org/publicdomain/zero/?.*');
// map licenses to ids by array position
$licenses = array(array(), $by1, $by2, $by21, $by25, $by3, $bysa1, $bysa2, $bysa21, $bysa25, $bysa3, $lal, $pd, $cc0);
function simplify_license($license) {
global $licenses;
foreach ($licenses as $key => $l) {
foreach ($l as $urlschema) {
if (preg_match("|$urlschema|", $license)) {
return $key;
}
}
}
return 0;
}
/**
* Returns true if the supplied license is one that we accept as being free
*
* @param $license string containing a license URL
* @return bool whether this license is free or not
*/
function is_free_license($license) {
global $licenses;
foreach ($licenses as $key => $l) {
foreach ($l as $urlschema) {
if (preg_match("|$urlschema|", $license)) {
return true;
}
}
}
return false;
}