change "callback" to "callable"

Author: sreichel

app/Mage.php

@@ -491,7 +491,7 @@ public static function getConfig()
      * Add observer to events object
      *
      * @param string $eventName
-     * @param callback $callback
+     * @param callable $callback
      * @param array $data
      * @param string $observerName
      * @param class-string|'' $observerClass

app/code/core/Mage/Customer/Model/Session.php

@@ -36,8 +36,8 @@
  * @method array getCustomerFormData()
  * @method $this setCustomerFormData(array $value)
  * @method bool  hasDisplayOutOfStockProducts()
- * @method string  getDisplayOutOfStockProducts(string $value)
- * @method $this  setDisplayOutOfStockProducts()
+ * @method string getDisplayOutOfStockProducts()
+ * @method $this  setDisplayOutOfStockProducts(string $value)
  * @method string getForgottenEmail()
  * @method $this setForgottenEmail(string $value)
  * @method $this unsForgottenEmail()

app/code/core/Mage/Paypal/Block/Adminhtml/System/Config/Fieldset/Payment.php

@@ -38,7 +38,7 @@ protected function _getFrontendClass($element)
      * Check whether current payment method is enabled
      *
      * @param Varien_Data_Form_Element_Abstract $element
-     * @param callback|null $configCallback
+     * @param callable|null $configCallback
      * @return bool
      */
     protected function _isPaymentEnabled($element, $configCallback = null)

lib/Varien/Data/Collection/Filesystem.php

@@ -386,7 +386,7 @@ protected function _generateRow($filename)
      * @param string $field
      * @param mixed $value
      * @param string $type 'and'|'or'
-     * @param callback $callback
+     * @param callable $callback
      * @param bool $isInverted
      * @return $this
      */
@@ -440,7 +440,7 @@ protected function _filterRow($row)
      * Invokes specified callback
      * Skips, if there is no filtered key in the row
      *
-     * @param callback $callback
+     * @param callable $callback
      * @param array $callbackParams
      * @return bool
      */

lib/Varien/Object/Mapper.php

@@ -40,8 +40,8 @@ class Varien_Object_Mapper
      *     <Varien_Object> => $from->setData($key, <from>)
      *     array(<Varien_Object>, <method>) => $from->$method($key, <from>)
      *
-     * @param array|Varien_Object|callback $from
-     * @param array|Varien_Object|callback $to
+     * @param array|Varien_Object|callable $from
+     * @param array|Varien_Object|callable $to
      * @return array|Varien_Object
      */
     public static function &accumulateByMap($from, $to, array $map, array $defaults = [])