And some more static warnings removed

include/Contact.php

@@ -523,7 +523,7 @@ function contacts_not_grouped($uid,$start = 0,$count = 0) {
  * @return integer Contact ID
  */
 function get_contact($url, $uid = 0, $no_update = false) {
-	logger("Get contact data for url ".$url." and user ".$uid." - ".App::callstack(), LOGGER_DEBUG);
+	logger("Get contact data for url ".$url." and user ".$uid." - ".System::callstack(), LOGGER_DEBUG);
 
 	$data = array();
 	$contact_id = 0;

include/dba.php

@@ -1,4 +1,6 @@
 <?php
+use \Friendica\Core\System;
+
 require_once("dbm.php");
 require_once('include/datetime.php');
 
@@ -228,7 +230,7 @@ class dba {
 		$orig_sql = $sql;
 
 		if (x($a->config,'system') && x($a->config['system'], 'db_callstack')) {
-			$sql = "/*".$a->callstack()." */ ".$sql;
+			$sql = "/*".System::callstack()." */ ".$sql;
 		}
 
 		$columns = 0;
@@ -549,7 +551,7 @@ class dba {
 		$orig_sql = $sql;
 
 		if (x($a->config,'system') && x($a->config['system'], 'db_callstack')) {
-			$sql = "/*".$a->callstack()." */ ".$sql;
+			$sql = "/*".System::callstack()." */ ".$sql;
 		}
 
 		self::$dbo->error = '';
@@ -679,7 +681,7 @@ class dba {
 			$errorno = self::$dbo->errorno;
 
 			logger('DB Error '.self::$dbo->errorno.': '.self::$dbo->error."\n".
-				$a->callstack(8)."\n".self::replace_parameters($sql, $params));
+				System::callstack(8)."\n".self::replace_parameters($sql, $params));
 
 			self::$dbo->error = $error;
 			self::$dbo->errorno = $errorno;
@@ -742,7 +744,7 @@ class dba {
 			$errorno = self::$dbo->errorno;
 
 			logger('DB Error '.self::$dbo->errorno.': '.self::$dbo->error."\n".
-				$a->callstack(8)."\n".self::replace_parameters($sql, $params));
+				System::callstack(8)."\n".self::replace_parameters($sql, $params));
 
 			self::$dbo->error = $error;
 			self::$dbo->errorno = $errorno;
@@ -914,7 +916,7 @@ class dba {
 	 *
 	 * @return integer Last inserted id
 	 */
-	function lastInsertId() {
+	public static function lastInsertId() {
 		switch (self::$dbo->driver) {
 			case 'pdo':
 				$id = self::$dbo->db->lastInsertId();

include/dbm.php

@@ -107,6 +107,6 @@ class dbm {
 			$timestamp = -62135596800;
 		}
 
-		return date('Y-m-d H:i:s', $timestamp);
+		return date('Y-m-d H:i:s', (int)$timestamp);
 	}
 }

include/items.php

@@ -666,7 +666,7 @@ function item_store($arr, $force_parent = false, $notify = false, $dontcache = f
 	}
 
 	if (($arr['author-link'] == "") && ($arr['owner-link'] == "")) {
-		logger("Both author-link and owner-link are empty. Called by: " . App::callstack(), LOGGER_DEBUG);
+		logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
 	}
 
 	if ($arr['plink'] == "") {

include/ostatus.php

@@ -1650,7 +1650,7 @@ class ostatus {
 	 *
 	 * @return string activity
 	 */
-	function construct_verb($item) {
+	private static function construct_verb($item) {
 		if ($item['verb'])
 			return $item['verb'];
 		return ACTIVITY_POST;
@@ -1663,7 +1663,7 @@ class ostatus {
 	 *
 	 * @return string Object type
 	 */
-	function construct_objecttype($item) {
+	private static function construct_objecttype($item) {
 		if (in_array($item['object-type'], array(ACTIVITY_OBJ_NOTE, ACTIVITY_OBJ_COMMENT)))
 			return $item['object-type'];
 		return ACTIVITY_OBJ_NOTE;

include/socgraph.php

@@ -2013,7 +2013,7 @@ function clean_contact_url($url) {
 	}
 
 	if ($new_url != $url) {
-		logger("Cleaned contact url ".$url." to ".$new_url." - Called by: ".App::callstack(), LOGGER_DEBUG);
+		logger("Cleaned contact url ".$url." to ".$new_url." - Called by: ".System::callstack(), LOGGER_DEBUG);
 	}
 
 	return $new_url;
@@ -2028,7 +2028,7 @@ function fix_alternate_contact_address(&$contact) {
 	if (($contact["network"] == NETWORK_OSTATUS) && poco_alternate_ostatus_url($contact["url"])) {
 		$data = probe_url($contact["url"]);
 		if ($contact["network"] == NETWORK_OSTATUS) {
-			logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
+			logger("Fix primary url from ".$contact["url"]." to ".$data["url"]." - Called by: ".System::callstack(), LOGGER_DEBUG);
 			$contact["url"] = $data["url"];
 			$contact["addr"] = $data["addr"];
 			$contact["alias"] = $data["alias"];
@@ -2049,7 +2049,7 @@ function get_gcontact_id($contact) {
 	$doprobing = false;
 
 	if (in_array($contact["network"], array(NETWORK_PHANTOM))) {
-		logger("Invalid network for contact url ".$contact["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
+		logger("Invalid network for contact url ".$contact["url"]." - Called by: ".System::callstack(), LOGGER_DEBUG);
 		return false;
 	}
 
@@ -2290,7 +2290,7 @@ function update_gcontact_from_probe($url) {
 	$data = probe_url($url);
 
 	if (in_array($data["network"], array(NETWORK_PHANTOM))) {
-		logger("Invalid network for contact url ".$data["url"]." - Called by: ".App::callstack(), LOGGER_DEBUG);
+		logger("Invalid network for contact url ".$data["url"]." - Called by: ".System::callstack(), LOGGER_DEBUG);
 		return;
 	}
 

src/App.php

@@ -2,6 +2,7 @@
 
 namespace Friendica;
 
+use Friendica\Core\System;
 use Friendica\Core\Config;
 use Friendica\Core\PConfig;
 
@@ -683,7 +684,7 @@ class App {
 		$this->performance[$value] += (float) $duration;
 		$this->performance['marktime'] += (float) $duration;
 
-		$callstack = $this->callstack();
+		$callstack = System::callstack();
 
 		if (!isset($this->callstack[$value][$callstack])) {
 			// Prevent ugly E_NOTICE
@@ -736,30 +737,6 @@ class App {
 		q('DELETE FROM `process` WHERE `pid` = %d', intval(getmypid()));
 	}
 
-	/**
-	 * @brief Returns a string with a callstack. Can be used for logging.
-	 *
-	 * @return string
-	 */
-	function callstack($depth = 4) {
-		$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, $depth + 2);
-
-		// We remove the first two items from the list since they contain data that we don't need.
-		array_shift($trace);
-		array_shift($trace);
-
-		$callstack = array();
-		foreach ($trace AS $func) {
-			if (!empty($func['class'])) {
-				$callstack[] = $func['class'].'::'.$func['function'];
-			} else {
-				$callstack[] = $func['function'];
-			}
-		}
-
-		return implode(', ', $callstack);
-	}
-
 	function get_useragent() {
 		return
 			FRIENDICA_PLATFORM . " '" .

src/Core/System.php

@@ -46,11 +46,35 @@ class System {
 	 *
 	 * @return string The cleaned url
 	 */
-        function removedBaseUrl($orig_url) {
+	public static function removedBaseUrl($orig_url) {
 		self::init();
 		return self::$a->remove_baseurl($orig_url);
 	}
 
+	/**
+	 * @brief Returns a string with a callstack. Can be used for logging.
+	 *
+	 * @return string
+	 */
+	public static function callstack($depth = 4) {
+		$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, $depth + 2);
+
+		// We remove the first two items from the list since they contain data that we don't need.
+		array_shift($trace);
+		array_shift($trace);
+
+		$callstack = array();
+		foreach ($trace AS $func) {
+			if (!empty($func['class'])) {
+				$callstack[] = $func['class'].'::'.$func['function'];
+			} else {
+				$callstack[] = $func['function'];
+			}
+		}
+
+		return implode(', ', $callstack);
+	}
+
 	/// @todo Move the following functions from boot.php
 	/*
 	function get_guid($size = 16, $prefix = "")