Optimize calls to debug_backtrace (#11)

Author: GromNaN

src/Eloquent/EmbedsRelations.php

@@ -23,9 +23,7 @@ protected function embedsMany($related, $localKey = null, $foreignKey = null, $r
         // the calling method's name and use that as the relationship name as most
         // of the time this will be what we desire to use for the relationships.
         if ($relation === null) {
-            [, $caller] = debug_backtrace(false);
-
-            $relation = $caller['function'];
+            $relation = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1]['function'];
         }
 
         if ($localKey === null) {
@@ -58,9 +56,7 @@ protected function embedsOne($related, $localKey = null, $foreignKey = null, $re
         // the calling method's name and use that as the relationship name as most
         // of the time this will be what we desire to use for the relationships.
         if ($relation === null) {
-            [, $caller] = debug_backtrace(false);
-
-            $relation = $caller['function'];
+            $relation = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1]['function'];
         }
 
         if ($localKey === null) {

src/Eloquent/HybridRelations.php

@@ -134,9 +134,7 @@ public function belongsTo($related, $foreignKey = null, $otherKey = null, $relat
         // the calling method's name and use that as the relationship name as most
         // of the time this will be what we desire to use for the relationships.
         if ($relation === null) {
-            [$current, $caller] = debug_backtrace(false, 2);
-
-            $relation = $caller['function'];
+            $relation = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1]['function'];
         }
 
         // Check if it is a relation with an original model.
@@ -178,9 +176,7 @@ public function morphTo($name = null, $type = null, $id = null, $ownerKey = null
         // since that is most likely the name of the polymorphic interface. We can
         // use that to get both the class and foreign key that will be utilized.
         if ($name === null) {
-            [$current, $caller] = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
-
-            $name = $caller['function'];
+            $name = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1]['function'];
         }
 
         [$type, $id] = $this->getMorphs(Str::snake($name), $type, $id);