+
+ /**
+ * @brief Callback function for "esc_array"
+ *
+ * @param mixed $value Array value
+ * @param string $key Array key
+ * @param boolean $add_quotation add quotation marks for string values
+ */
+ private static function esc_array_callback(&$value, $key, $add_quotation) {
+
+ if (!$add_quotation) {
+ if (is_bool($value)) {
+ $value = ($value ? '1' : '0');
+ } else {
+ $value = dbesc($value);
+ }
+ return;
+ }
+
+ if (is_bool($value)) {
+ $value = ($value ? 'true' : 'false');
+ } elseif (is_float($value) OR is_integer($value)) {
+ $value = (string)$value;
+ } else {
+ $value = "'".dbesc($value)."'";
+ }
+ }
+
+ /**
+ * @brief Escapes a whole array
+ *
+ * @param mixed $arr Array with values to be escaped
+ * @param boolean $add_quotation add quotation marks for string values
+ */
+ public static function esc_array(&$arr, $add_quotation = false) {
+ array_walk($arr, 'self::esc_array_callback', $add_quotation);
+ }
+
+ /**
+ * Checks Converts any date string into a SQL compatible date string
+ *
+ * @param string $date a date string in any format
+ * @return string SQL style date string
+ */
+ public static function date($date = 'now') {
+ $timestamp = strtotime($date);
+
+ // Workaround for 3.5.1
+ if ($timestamp < -62135596800) {
+ return '0000-00-00 00:00:00';
+ }
+
+ // The above will be removed in 3.5.2
+ // The following will then be enabled
+ // Don't allow lower date strings as '0001-01-01 00:00:00'
+ //if ($timestamp < -62135596800) {
+ // $timestamp = -62135596800;
+ //}
+
+ return date('Y-m-d H:i:s', $timestamp);
+ }