Fix conflict with Cyr2Lat.

.tests/php/unit/HCaptchaTestCase.php

@@ -105,6 +105,89 @@ protected function set_method_accessibility( $object, $method_name, $accessible
 		return $method;
 	}
 
+	/**
+	 * Plucks a certain field out of each object or array in an array.
+	 * Taken from WP Core.
+	 *
+	 * @param array      $input_list List of objects or arrays.
+	 * @param int|string $field      Field from the object to place instead of the entire object.
+	 * @param int|string $index_key  Optional. Field from the object to use as keys for the new array.
+	 *                               Default null.
+	 *
+	 * @return array Array of found values. If `$index_key` is set, an array of found values with keys
+	 *               corresponding to `$index_key`. If `$index_key` is null, array keys from the original
+	 *               `$input_list` will be preserved in the results.
+	 */
+	protected function wp_list_pluck( $input_list, $field, $index_key = null ) {
+		if ( ! is_array( $input_list ) ) {
+			return [];
+		}
+
+		return $this->pluck( $input_list, $field, $index_key );
+	}
+
+	/**
+	 * Plucks a certain field out of each element in the input array.
+	 * Taken from WP Core.
+	 *
+	 * @param array      $input_list List of objects or arrays.
+	 * @param int|string $field      Field to fetch from the object or array.
+	 * @param int|string $index_key  Optional. Field from the element to use as keys for the new array.
+	 *                               Default null.
+	 *
+	 * @return array Array of found values. If `$index_key` is set, an array of found values with keys
+	 *               corresponding to `$index_key`. If `$index_key` is null, array keys from the original
+	 *               `$list` will be preserved in the results.
+	 */
+	private function pluck( $input_list, $field, $index_key = null ) {
+		$output   = $input_list;
+		$new_list = [];
+
+		if ( ! $index_key ) {
+			/*
+			 * This is simple. Could at some point wrap array_column()
+			 * if we knew we had an array of arrays.
+			 */
+			foreach ( $output as $key => $value ) {
+				if ( is_object( $value ) ) {
+					$new_list[ $key ] = $value->$field;
+				} elseif ( is_array( $value ) ) {
+					$new_list[ $key ] = $value[ $field ];
+				} else {
+					// Error.
+					return [];
+				}
+			}
+
+			return $new_list;
+		}
+
+		/*
+		 * When index_key is not set for a particular item, push the value
+		 * to the end of the stack. This is how array_column() behaves.
+		 */
+		foreach ( $output as $value ) {
+			if ( is_object( $value ) ) {
+				if ( isset( $value->$index_key ) ) {
+					$new_list[ $value->$index_key ] = $value->$field;
+				} else {
+					$new_list[] = $value->$field;
+				}
+			} elseif ( is_array( $value ) ) {
+				if ( isset( $value[ $index_key ] ) ) {
+					$new_list[ $value[ $index_key ] ] = $value[ $field ];
+				} else {
+					$new_list[] = $value[ $field ];
+				}
+			} else {
+				// Error.
+				return [];
+			}
+		}
+
+		return $new_list;
+	}
+
 	/**
 	 * Get test settings.
 	 *