large performance improvements

src/FlatArrayInterface.php

@@ -13,7 +13,4 @@ interface FlatArrayInterface extends \ArrayAccess, \Iterator
     public function pop(?string $name);
     public function unshift(?string $name, $value);
     public function shift(?string $name);
-
-    public function lock();
-    public function unlock();
 }

src/FlatArrayTrait.php

@@ -5,23 +5,9 @@ namespace Flatrr;
 trait FlatArrayTrait
 {
     private $_arrayData = array();
-    private $_locked = false;
-
-    public function lock()
-    {
-        $this->_locked = true;
-    }
-
-    public function unlock()
-    {
-        $this->_locked = false;
-    }
 
     public function push(?string $name, $value)
     {
-        if ($this->_locked) {
-            return null;
-        }
         $arr = $this->get($name);
         if ($arr !== null && !is_array($arr)) {
             return;
@@ -35,9 +21,6 @@ trait FlatArrayTrait
 
     public function pop(?string $name)
     {
-        if ($this->_locked) {
-            return null;
-        }
         $arr = $this->get($name);
         if ($arr !== null && !is_array($arr)) {
             return;
@@ -49,9 +32,6 @@ trait FlatArrayTrait
 
     public function unshift(?string $name, $value)
     {
-        if ($this->_locked) {
-            return null;
-        }
         $arr = $this->get($name);
         if ($arr !== null && !is_array($arr)) {
             return;
@@ -65,9 +45,6 @@ trait FlatArrayTrait
 
     public function shift(?string $name)
     {
-        if ($this->_locked) {
-            return null;
-        }
         $arr = $this->get($name);
         if ($arr !== null && !is_array($arr)) {
             return;
@@ -79,9 +56,6 @@ trait FlatArrayTrait
 
     public function set(?string $name, $value)
     {
-        if ($this->_locked) {
-            return $this->get($name);
-        }
         return $this->flattenSearch($name, $value);
     }
 
@@ -90,11 +64,7 @@ trait FlatArrayTrait
         return $this->flattenSearch($name);
     }
 
-    public function unset(?string $name)
+    function unset(?string $name) {
-    {
-        if ($this->_locked) {
-            return null;
-        }
         $this->flattenSearch($name, null, true);
     }
 
@@ -149,9 +119,6 @@ trait FlatArrayTrait
      */
     public function merge($value, string $name = null, bool $overwrite = false)
     {
-        if ($this->_locked) {
-            return null;
-        }
         if (!isset($this[$name])) {
             //easiest possible outcome, old value doesn't exist, so we can just write the value
             $this->set($name, $value);
@@ -160,7 +127,7 @@ trait FlatArrayTrait
             //both new and old values are arrays
             foreach ($value as $k => $v) {
                 if ($name) {
-                    $k = $name.'.'.$k;
+                    $k = $name . '.' . $k;
                 }
                 $this->merge($v, $k, $overwrite);
             }
@@ -198,7 +165,7 @@ trait FlatArrayTrait
             return null;
         }
         //build a reference to where this name should be
-        $parent  = &$this->_arrayData;
+        $parent = &$this->_arrayData;
         $name = explode('.', $name);
         $key = array_pop($name);
         foreach ($name as $part) {

src/SelfReferencingFlatArray.php

@@ -4,7 +4,7 @@ namespace Flatrr;
 
 class SelfReferencingFlatArray extends FlatArray
 {
-    public function get(string $name=null, bool $raw = false, $unescape = true)
+    public function get(string $name = null, bool $raw = false, $unescape = true)
     {
         $out = parent::get($name);
         if ($raw) {
@@ -51,40 +51,36 @@ class SelfReferencingFlatArray extends FlatArray
      */
     protected function filter($value)
     {
-        if ($value === null) {
-            return null;
-        }
-        //search/replace on string values
-        if (is_string($value)) {
-            //search for valid replacements
-            $value = preg_replace_callback(
-                //search for things like ${var/name}, escape with \ before last brace
-                '/\$\{([^\}]*[^\.\\\])\}/',
-                //replace match with value from $this if it exists
-                function ($matches) {
-                    if (null !== $value = $this->get($matches[1], false, false)) {
-                        if (!is_array($value)) {
-                            return $value;
-                        }
-                    }
-                    return $matches[0];
-                },
-                //applied to $value
-                $value
-            );
-            //return
-            return $value;
-        }
         //map this function onto array values
         if (is_array($value)) {
             return array_map(
-                function ($i) {
+                [$this, 'filter'],
-                    return $this->filter($i);
+                $value
-                },
+            );
+        }
+        //search/replace on string values
+        if (is_string($value) && strpos($value, '${') !== false) {
+            //search for valid replacements
+            return preg_replace_callback(
+                //search for things like ${var/name}, escape with \ before last brace
+                '/\$\{([^\}]*[^\.\\\])\}/S',
+                //replace match with value from $this if it exists
+                [$this, 'filter_regex'],
+                //applied to $value
                 $value
             );
         }
         //fall back to just returning value, it's some other datatype
         return $value;
     }
+
+    protected function filter_regex($matches)
+    {
+        if (null !== $value = $this->get($matches[1], false, false)) {
+            if (!is_array($value)) {
+                return $value;
+            }
+        }
+        return $matches[0];
+    }
 }