PHP 8.4.0 RC4 available for testing

mb_trim

(PHP 8 >= 8.4.0)

mb_trimStrip whitespace (or other characters) from the beginning and end of a string

Description

mb_trim(string $string, string $characters = null, string $encoding = null): string

Performs a multi-byte safe trim() operation, and returns a string with whitespace stripped from the beginning and end of string. Without the second parameter, mb_trim() 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.

Parameters

string
The string that will be trimmed.
characters
Optionally, the stripped characters can also be specified using the characters parameter. Simply list all characters that need to be stripped.
encoding
The string encoding.

Return Values

The trimmed string.

See Also

  • mb_ltrim() - Strip whitespace (or other characters) from the beginning of a string
  • mb_rtrim() - Strip whitespace (or other characters) from the end of a string
  • trim() - Strip whitespace (or other characters) from the beginning and end of a string
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