diff --git a/admin/admin_log.php b/admin/admin_log.php
index fb3ef5004..3452a403b 100644
--- a/admin/admin_log.php
+++ b/admin/admin_log.php
@@ -154,7 +154,7 @@ $order_val = 'log_time';
 // Sort
 $sort_val = $def_sort;
 
-if ($var =& $_REQUEST[$sort_key] and $var != $def_sort) {
+if ($var =& $_REQUEST[$sort_key] && $var != $def_sort) {
     $sort_val = ($var == $sort_asc) ? $sort_asc : $sort_desc;
     $url = url_arg($url, $sort_key, $sort_val);
 }
@@ -163,11 +163,11 @@ if ($var =& $_REQUEST[$sort_key] and $var != $def_sort) {
 $datetime_val = $def_datetime;
 $daysback_val = $def_days;
 
-if ($var =& $_REQUEST[$daysback_key] and $var != $def_days) {
+if ($var =& $_REQUEST[$daysback_key] && $var != $def_days) {
     $daysback_val = max(intval($var), 1);
     $url = url_arg($url, $daysback_key, $daysback_val);
 }
-if ($var =& $_REQUEST[$datetime_key] and $var != $def_datetime) {
+if ($var =& $_REQUEST[$datetime_key] && $var != $def_datetime) {
     $tz = TIMENOW + (3600 * $bb_cfg['board_timezone']);
     if (($tmp_timestamp = strtotime($var, $tz)) > 0) {
         $datetime_val = $tmp_timestamp;
diff --git a/library/includes/functions_post.php b/library/includes/functions_post.php
index 801b6aa29..f8c718c47 100644
--- a/library/includes/functions_post.php
+++ b/library/includes/functions_post.php
@@ -92,7 +92,7 @@ function submit_post($mode, &$post_data, &$message, &$meta, &$forum_id, &$topic_
     if ($mode == 'newtopic' || $mode == 'reply') {
         $sql = "SELECT MAX(p.post_time) AS last_post_time FROM " . BB_POSTS . " p WHERE $where_sql";
 
-        if ($row = DB()->fetch_row($sql) and $row['last_post_time']) {
+        if ($row = DB()->fetch_row($sql) && $row['last_post_time']) {
             if ($userdata['user_level'] == USER) {
                 if (TIMENOW - $row['last_post_time'] < $bb_cfg['flood_interval']) {
                     bb_die($lang['FLOOD_ERROR']);
diff --git a/library/includes/posting_tpl.php b/library/includes/posting_tpl.php
index e0b013847..c502eade1 100644
--- a/library/includes/posting_tpl.php
+++ b/library/includes/posting_tpl.php
@@ -33,14 +33,14 @@ $edit_tpl_mode = ($can_edit_tpl && !empty($_REQUEST['edit_tpl']));
 // forum_data
 $sql = "SELECT forum_name, allow_reg_tracker, forum_tpl_id FROM " . BB_FORUMS . " WHERE forum_id = $forum_id LIMIT 1";
 
-if (!$forum_id or !$f_data = DB()->fetch_row($sql)) {
+if (!$forum_id || !$f_data = DB()->fetch_row($sql)) {
     bb_die($lang['FORUM_NOT_EXIST']);
 }
 // tpl_data
 $tpl_data = array();
 $sql = "SELECT * FROM " . BB_TOPIC_TPL . " WHERE tpl_id = {$f_data['forum_tpl_id']} LIMIT 1";
 
-if (!$f_data['forum_tpl_id'] or !$tpl_data = DB()->fetch_row($sql)) {
+if (!$f_data['forum_tpl_id'] || !$tpl_data = DB()->fetch_row($sql)) {
     if (!$edit_tpl_mode) {
         redirect(POSTING_URL . "?mode=newtopic&f=$forum_id");
     }