Fixes #7488: Added StringHelper::explode to perform explode with trimming and skipping of empty elements

framework/helpers/BaseStringHelper.php

@@ -234,4 +234,35 @@ class BaseStringHelper
             return mb_strtolower(mb_substr($string, -$bytes, null, '8bit'), Yii::$app->charset) === mb_strtolower($with, Yii::$app->charset);
         }
     }
+
+    /**
+     * Explodes string into array, optionally trims values and skips empty ones
+     *
+     * @param string $string String to be exploded.
+     * @param string $delimiter Delimiter. Default is ','.
+     * @param mixed $trim Whether to trim each element. Can be:
+     *   - boolean - to trim normally;
+     *   - string - custom characters to trim. Will be passed as a second argument to `trim()` function.
+     *   - callable - will be called for each value instead of trim. Takes the only argument - value.
+     * @param boolean $skipEmpty Whether to skip empty strings between delimiters. Default is false.
+     * @return array
+     */
+    public static function explode($string, $delimiter = ',', $trim = true, $skipEmpty = false) {
+        $result = explode($delimiter, $string);
+        if ($trim) {
+            if ($trim === true) {
+                $trim = 'trim';
+            } elseif (!is_callable($trim)) {
+                $trim = function($v) use ($trim) {
+                    return trim($v, $trim);
+                };
+            }
+            $result = array_map($trim, $result);
+        }
+        if ($skipEmpty) {
+            // Wrapped with array_values to make array keys sequential after empty values removing
+            $result = array_values(array_filter($result));
+        }
+        return $result;
+    }
 }