diff --git a/generated/iconv.php b/generated/iconv.php
index eda7faaf..7b28b496 100644
--- a/generated/iconv.php
+++ b/generated/iconv.php
@@ -59,18 +59,17 @@ function iconv_set_encoding(string $type, string $encoding): void
 
 
 /**
- * Performs a character set conversion on the string
- * string from from_encoding
+ * Converts string from from_encoding
  * to to_encoding.
  *
- * @param string $from_encoding The input charset.
- * @param string $to_encoding The output charset.
+ * @param string $from_encoding The current encoding used to interpret string.
+ * @param string $to_encoding The desired encoding of the result.
  *
- * If you append the string //TRANSLIT to
- * to_encoding transliteration is activated. This
+ * If the string //TRANSLIT is appended to
+ * to_encoding, then transliteration is activated. This
  * means that when a character can't be represented in the target charset,
- * it can be approximated through one or several similarly looking
- * characters. If you append the string //IGNORE,
+ * it may be approximated through one or several similarly looking
+ * characters. If the string //IGNORE is appended,
  * characters that cannot be represented in the target charset are silently
  * discarded. Otherwise, E_NOTICE is generated and the function
  * will return FALSE.
diff --git a/generated/mbstring.php b/generated/mbstring.php
index 76321f6f..49622015 100644
--- a/generated/mbstring.php
+++ b/generated/mbstring.php
@@ -35,22 +35,25 @@ function mb_chr(int $codepoint, string $encoding = null): string
 
 
 /**
- * Converts the character encoding of string
- * to to_encoding
- * from optionally from_encoding.
+ * Converts string from from_encoding,
+ * or the current internal encoding, to to_encoding.
  * If string is an array, all its string values will be
  * converted recursively.
  *
- * @param string|array $string The string or array being encoded.
- * @param string $to_encoding The type of encoding that string is being converted to.
- * @param mixed $from_encoding Is specified by character code names before conversion. It is either
- * an array, or a comma separated enumerated list.
- * If from_encoding is not specified, the internal
- * encoding will be used.
+ * @param string|array $string The string or array to be converted.
+ * @param string $to_encoding The desired encoding of the result.
+ * @param mixed $from_encoding The current encoding used to interpret string.
+ * Multiple encodings may be specified as an array or comma separated
+ * list, in which case the correct encoding will be guessed using the
+ * same algorithm as mb_detect_encoding.
  *
+ * If from_encoding is NULL or not specified, the
+ * mbstring.internal_encoding setting
+ * will be used if set, otherwise the default_charset setting.
  *
- * See supported
- * encodings.
+ * See supported encodings
+ * for valid values of to_encoding
+ * and from_encoding.
  * @return string|array The encoded string or array on success.
  * @throws MbstringException
  *