Use static:: instead of $this for static method calls

framework/base/Application.php

@@ -195,7 +195,7 @@ abstract class Application extends Module
     public function __construct($config = [])
     {
         Yii::$app = $this;
-        $this->setInstance($this);
+        static::setInstance($this);
 
         $this->state = self::STATE_BEGIN;
 

framework/captcha/Captcha.php

@@ -91,7 +91,7 @@ class Captcha extends InputWidget
     {
         parent::init();
 
-        $this->checkRequirements();
+        static::checkRequirements();
 
         if (!isset($this->imageOptions['id'])) {
             $this->imageOptions['id'] = $this->options['id'] . '-image';
@@ -165,9 +165,8 @@ class Captcha extends InputWidget
     public static function checkRequirements()
     {
         if (extension_loaded('imagick')) {
-            $imagick = new \Imagick();
-            $imagickFormats = $imagick->queryFormats('PNG');
-            if (in_array('PNG', $imagickFormats)) {
+            $imagickFormats = \Imagick::queryFormats('PNG');
+            if (in_array('PNG', $imagickFormats, true)) {
                 return 'imagick';
             }
         }

framework/db/ActiveRecord.php

@@ -114,7 +114,7 @@ class ActiveRecord extends BaseActiveRecord
      */
     public function loadDefaultValues($skipIfSet = true)
     {
-        foreach ($this->getTableSchema()->columns as $column) {
+        foreach (static::getTableSchema()->columns as $column) {
             if ($column->defaultValue !== null && (!$skipIfSet || $this->{$column->name} === null)) {
                 $this->{$column->name} = $column->defaultValue;
             }
@@ -454,11 +454,11 @@ class ActiveRecord extends BaseActiveRecord
             return false;
         }
         $values = $this->getDirtyAttributes($attributes);
-        if (($primaryKeys = static::getDb()->schema->insert($this->tableName(), $values)) === false) {
+        if (($primaryKeys = static::getDb()->schema->insert(static::tableName(), $values)) === false) {
             return false;
         }
         foreach ($primaryKeys as $name => $value) {
-            $id = $this->getTableSchema()->columns[$name]->phpTypecast($value);
+            $id = static::getTableSchema()->columns[$name]->phpTypecast($value);
             $this->setAttribute($name, $id);
             $values[$name] = $id;
         }
@@ -607,7 +607,7 @@ class ActiveRecord extends BaseActiveRecord
         if ($lock !== null) {
             $condition[$lock] = $this->$lock;
         }
-        $result = $this->deleteAll($condition);
+        $result = static::deleteAll($condition);
         if ($lock !== null && !$result) {
             throw new StaleObjectException('The object being deleted is outdated.');
         }
@@ -630,7 +630,7 @@ class ActiveRecord extends BaseActiveRecord
             return false;
         }
 
-        return $this->tableName() === $record->tableName() && $this->getPrimaryKey() === $record->getPrimaryKey();
+        return static::tableName() === $record->tableName() && $this->getPrimaryKey() === $record->getPrimaryKey();
     }
 
     /**

framework/db/BaseActiveRecord.php

@@ -688,7 +688,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
             return 0;
         }
 
-        $rows = $this->updateAll($values, $this->getOldPrimaryKey(true));
+        $rows = static::updateAll($values, $this->getOldPrimaryKey(true));
 
         foreach ($values as $name => $value) {
             $this->_oldAttributes[$name] = $this->_attributes[$name];
@@ -721,7 +721,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
         }
         // We do not check the return value of updateAll() because it's possible
         // that the UPDATE statement doesn't change anything and thus returns 0.
-        $rows = $this->updateAll($values, $condition);
+        $rows = static::updateAll($values, $condition);
 
         if ($lock !== null && !$rows) {
             throw new StaleObjectException('The object being updated is outdated.');
@@ -760,7 +760,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
      */
     public function updateCounters($counters)
     {
-        if ($this->updateAllCounters($counters, $this->getOldPrimaryKey(true)) > 0) {
+        if (static::updateAllCounters($counters, $this->getOldPrimaryKey(true)) > 0) {
             foreach ($counters as $name => $value) {
                 if (!isset($this->_attributes[$name])) {
                     $this->_attributes[$name] = $value;
@@ -805,7 +805,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
             if ($lock !== null) {
                 $condition[$lock] = $this->$lock;
             }
-            $result = $this->deleteAll($condition);
+            $result = static::deleteAll($condition);
             if ($lock !== null && !$result) {
                 throw new StaleObjectException('The object being deleted is outdated.');
             }
@@ -957,7 +957,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
     public function refresh()
     {
         /* @var $record BaseActiveRecord */
-        $record = $this->findOne($this->getPrimaryKey(true));
+        $record = static::findOne($this->getPrimaryKey(true));
         if ($record === null) {
             return false;
         }
@@ -1212,7 +1212,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
             }
         } else {
             $p1 = $model->isPrimaryKey(array_keys($relation->link));
-            $p2 = $this->isPrimaryKey(array_values($relation->link));
+            $p2 = static::isPrimaryKey(array_values($relation->link));
             if ($p1 && $p2) {
                 if ($this->getIsNewRecord() && $model->getIsNewRecord()) {
                     throw new InvalidCallException('Unable to link models: at most one model can be newly created.');
@@ -1302,7 +1302,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
             }
         } else {
             $p1 = $model->isPrimaryKey(array_keys($relation->link));
-            $p2 = $this->isPrimaryKey(array_values($relation->link));
+            $p2 = static::isPrimaryKey(array_values($relation->link));
             if ($p2) {
                 foreach ($relation->link as $a => $b) {
                     $model->$a = null;

framework/log/Target.php

@@ -99,7 +99,7 @@ abstract class Target extends Component
      */
     public function collect($messages, $final)
     {
-        $this->messages = array_merge($this->messages, $this->filterMessages($messages, $this->getLevels(), $this->categories, $this->except));
+        $this->messages = array_merge($this->messages, static::filterMessages($messages, $this->getLevels(), $this->categories, $this->except));
         $count = count($this->messages);
         if ($count > 0 && ($final || $this->exportInterval > 0 && $count >= $this->exportInterval)) {
             if (($context = $this->getContextMessage()) !== '') {