Permission-Bitmask) var $permissions = array (); ## ## Permission code ## function check($p) { global $auth; if (! $this->have_perm($p)) { if (! isset($auth->auth["perm"]) ) { $auth->auth["perm"] = ""; } $this->perm_invalid($auth->auth["perm"], $p); exit(); } } function have_perm($p) { global $auth; if (! isset($auth->auth["perm"]) ) { $auth->auth["perm"] = ""; } $pageperm = split(",", $p); $userperm = split(",", $auth->auth["perm"]); list ($ok0, $pagebits) = $this->permsum($pageperm); list ($ok1, $userbits) = $this->permsum($userperm); $has_all = (($userbits & $pagebits) == $pagebits); if (!($has_all && $ok0 && $ok1) ) { return false; } else { return true; } } ## ## Permission helpers. ## function permsum($p) { global $auth; if (!is_array($p)) { return array(false, 0); } $perms = $this->permissions; $r = 0; reset($p); while(list($key, $val) = each($p)) { if (!isset($perms[$val])) { return array(false, 0); } $r |= $perms[$val]; } return array(true, $r); } ## Look for a match within an list of strints ## I couldn't figure out a way to do this generally using ereg(). function perm_islisted($perms, $look_for) { $permlist = explode( ",", $perms ); while( list($a,$b) = each($permlist) ) { if( $look_for == $b ) { return true; }; }; return false; } ## Return a complete tag for permission ## selection. function perm_sel($name, $current = "", $class = "") { reset($this->permissions); $ret = sprintf("\n", $name, ($class!="")?" class=$class":""); while(list($k, $v) = each($this->permissions)) { $ret .= sprintf(" %s\n", $this->perm_islisted($current,$k)?" selected":"", ($class!="")?" class=$class":"", $k); } $ret .= ""; return $ret; } ## ## Dummy Method. Must be overridden by user. ## function perm_invalid($does_have, $must_have) { printf("Access denied.\n"); } } ?>