function inverseHex($color)
{
$color = TRIM($color);
$prependHash = FALSE;
if (STRPOS($color, '#') !== FALSE) {
$prependHash = TRUE;
$color = STR_REPLACE('#', NULL, $color);
}
switch ($len = STRLEN($color)) {
case 3:
$color = PREG_REPLACE("/(.)(.)(.)/", "\\1\\1\\2\\2\\3\\3", $color);
case 6:
break;
default:
TRIGGER_ERROR("Invalid hex length ({$len}). Must be (3) or (6)", E_USER_ERROR);
}
if (!PREG_MATCH('/[a-f0-9]{6}/i', $color)) {
$color = HTMLENTITIES($color);
TRIGGER_ERROR("Invalid hex string #{$color}", E_USER_ERROR);
}
$r = DECHEX(255 - HEXDEC(SUBSTR($color, 0, 2)));
$r = STRLEN($r) > 1 ? $r : '0' . $r;
$g = DECHEX(255 - HEXDEC(SUBSTR($color, 2, 2)));
$g = STRLEN($g) > 1 ? $g : '0' . $g;
$b = DECHEX(255 - HEXDEC(SUBSTR($color, 4, 2)));
$b = STRLEN($b) > 1 ? $b : '0' . $b;
return ($prependHash ? '#' : NULL) . $r . $g . $b;
}
array_push($wyniki, $row);
}
shuffle($wyniki);
if (count($wyniki) > 0) {
$i = 0;
foreach ($wyniki as $r) {
if ($i < 8) {
$i++;
$rand = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
$color = '#' . $rand[rand(0, 15)] . $rand[rand(0, 15)] . $rand[rand(0, 15)] . $rand[rand(0, 15)] . $rand[rand(0, 15)] . $rand[rand(0, 15)];
$hashlesscolor = STR_REPLACE('#', NULL, $color);
$rr = DECHEX(255 - HEXDEC(SUBSTR($hashlesscolor, 0, 2)));
$rr = STRLEN($rr) > 1 ? $rr : '0' . $rr;
$gg = DECHEX(255 - HEXDEC(SUBSTR($hashlesscolor, 2, 2)));
$gg = STRLEN($gg) > 1 ? $gg : '0' . $gg;
$bb = DECHEX(255 - HEXDEC(SUBSTR($hashlesscolor, 4, 2)));
$bb = STRLEN($bb) > 1 ? $bb : '0' . $bb;
$invcolor = '#' . $rr . $gg . $bb;
echo "<div class=\"col-md-3 col-centered\"style=\"text-align:center;padding: 2.5% 2.5% 2.5% 2.5%;\">";
echo "<div class=\"circle\" style=\"text-shadow: -1px 0 #444444, 0 1px #444444, 1px 0 #444444, 0 -1px #444444; border: 1px solid black;color:" . $invcolor . "; background-color:" . $color . "\">";
echo "<a href=\"sesja.php?sesja=" . $r['id_sesji'] . "\">";
echo "<h2>" . $r['lokalizacja'] . "</h2>";
echo "<p>" . $r['data'] . "</p>";
echo "</a>";
echo "</div>";
echo "</div>";
} else {
break;
}
}
} else {