diff --git a/reference/mbstring/functions/mb-strwidth.xml b/reference/mbstring/functions/mb-strwidth.xml
index de10c48ccb..e6b4740a5c 100644
--- a/reference/mbstring/functions/mb-strwidth.xml
+++ b/reference/mbstring/functions/mb-strwidth.xml
@@ -14,45 +14,52 @@
stringencodingmb_internal_encoding()
- Returns the width of string str.
+ Returns the width of string str,
+ where halfwidth characters count as 1, and fullwidth
+ characters count as 2.
- Multi-byte characters are usually twice the width of single byte characters.
-
-
-
- Characters width
-
-
-
- Chars
- Width
-
-
-
-
- U+0000 - U+0019
- 0
-
-
- U+0020 - U+1FFF
- 1
-
-
- U+2000 - U+FF60
- 2
-
-
- U+FF61 - U+FF9F
- 1
-
-
- U+FFA0 -
- 2
-
-
-
-
+ The fullwidth characters are:
+ U+1100-U+115F,
+ U+11A3-U+11A7,
+ U+11FA-U+11FF,
+ U+2329-U+232A,
+ U+2E80-U+2E99,
+ U+2E9B-U+2EF3,
+ U+2F00-U+2FD5,
+ U+2FF0-U+2FFB,
+ U+3000-U+303E,
+ U+3041-U+3096,
+ U+3099-U+30FF,
+ U+3105-U+312D,
+ U+3131-U+318E,
+ U+3190-U+31BA,
+ U+31C0-U+31E3,
+ U+31F0-U+321E,
+ U+3220-U+3247,
+ U+3250-U+32FE,
+ U+3300-U+4DBF,
+ U+4E00-U+A48C,
+ U+A490-U+A4C6,
+ U+A960-U+A97C,
+ U+AC00-U+D7A3,
+ U+D7B0-U+D7C6,
+ U+D7CB-U+D7FB,
+ U+F900-U+FAFF,
+ U+FE10-U+FE19,
+ U+FE30-U+FE52,
+ U+FE54-U+FE66,
+ U+FE68-U+FE6B,
+ U+FF01-U+FF60,
+ U+FFE0-U+FFE6,
+ U+1B000-U+1B001,
+ U+1F200-U+1F202,
+ U+1F210-U+1F23A,
+ U+1F240-U+1F248,
+ U+1F250-U+1F251,
+ U+20000-U+2FFFD,
+ U+30000-U+3FFFD.
+ All other characters are halfwidth characters.