camelCaseKeys() polyfill

notice-manager.php

@@ -53,6 +53,7 @@ new PluginCore(
 	]
 );
 
+require_once 'src/utilities.php';
 require_once 'src/NoticeManager.php';
 
 

src/utilities.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Utility functions and polyfills
+ * 
+ * @since x.x.x
+ */
+
+
+/**
+ * convert array keys from under_score to camelCase
+ *
+ * @param   array   $array          array to convert
+ * @param   array   $arrayHolder    parent array holder for recursive array
+ * @return  array   camelCase array
+ * @link https://gist.github.com/goldsky/3372487
+ *
+ * with a more elegant code from here (that apparently doesn't work):
+ * @link https://stackoverflow.com/questions/2791998/convert-dashes-to-camelcase-in-php
+ *
+ */
+if ( ! function_exists( 'camelCaseKeys' ) ):
+function camelCaseKeys($array, $arrayHolder = array()) {
+	$camelCaseArray = !empty($arrayHolder) ? $arrayHolder : array();
+	foreach ($array as $key => $val) {
+		$newKey = @explode('_', $key);
+		//array_walk($newKey, create_function('&$v', '$v = ucwords($v);')); //If you are using PHP 5.3.0 or newer a native anonymous function should be used instead.
+		array_walk($newKey, function(&$v){$v = ucwords($v);});
+		$newKey = @implode('', $newKey);
+		$newKey = @lcfirst($newKey); //$newKey{0} = strtolower($newKey{0});
+		
+		/* if (! $newKey = @ucwords($key, '_') )
+			$newKey = $key;
+		$newKey = @str_replace('_', '', $newKey);
+		$newKey = @lcfirst($newKey); */
+		
+		if (!is_array($val)) {
+			$camelCaseArray[$newKey] = $val;
+		} else {
+			//this line throws an 'index undefined' notice
+			//$camelCaseArray[$newKey] = camelCaseKeys($val, $camelCaseArray[$newKey]);
+			
+			//$camelCaseArray[$newKey] = camelCaseKeys($val, $array[$key]);  //? this works? why?
+			//$camelCaseArray[$newKey] = camelCaseKeys($val, $val);  //? this works? why?
+			$camelCaseArray[$newKey] = camelCaseKeys($val);  //? this works? why?
+		}
+	}
+	return $camelCaseArray;
+}
+endif;