mb_rtrim

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Performs a multi-byte safe rtrim() operation, and returns a string with whitespace (or other characters) stripped from the end of string.

Without the second parameter, mb_rtrim() will strip these characters:

• " " (Unicode U+0020), an ordinary space.
• "\t" (Unicode U+0009), a tab.
• "\n" (Unicode U+000A), a new line (line feed).
• "\r" (Unicode U+000D), a carriage return.
• "\0" (Unicode U+0000), the NUL-byte.
• "\v" (Unicode U+000B), a vertical tab.
• "\f" (Unicode U+000C), a form feed.
• "\u00A0" (Unicode U+00A0), a NO-BREAK SPACE.
• "\u1680" (Unicode U+1680), a OGHAM SPACE MARK.
• "\u2000" (Unicode U+2000), a EN QUAD.
• "\u2001" (Unicode U+2001), a EM QUAD.
• "\u2002" (Unicode U+2002), a EN SPACE.
• "\u2003" (Unicode U+2003), a EM SPACE.
• "\u2004" (Unicode U+2004), a THREE-PER-EM SPACE.
• "\u2005" (Unicode U+2005), a FOUR-PER-EM SPACE.
• "\u2006" (Unicode U+2006), a SIX-PER-EM SPACE.
• "\u2007" (Unicode U+2007), a FIGURE SPACE.
• "\u2008" (Unicode U+2008), a PUNCTUATION SPACE.
• "\u2009" (Unicode U+2009), a THIN SPACE.
• "\u200A" (Unicode U+200A), a HAIR SPACE.
• "\u2028" (Unicode U+2028), a LINE SEPARATOR.
• "\u2029" (Unicode U+2029), a PARAGRAPH SEPARATOR.
• "\u202F" (Unicode U+202F), a NARROW NO-BREAK SPACE.
• "\u205F" (Unicode U+205F), a MEDIUM MATHEMATICAL SPACE.
• "\u3000" (Unicode U+3000), a IDEOGRAPHIC SPACE.
• "\u0085" (Unicode U+0085), a NEXT LINE (NEL).
• "\u180E" (Unicode U+180E), a MONGOLIAN VOWEL SEPARATOR.