array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'it', ), 'this' => array ( 0 => 'function.mb-ltrim.php', 1 => 'mb_ltrim', 2 => 'Strip whitespace (or other characters) from the beginning of a string', ), 'up' => array ( 0 => 'ref.mbstring.php', 1 => 'Multibyte String Funzioni', ), 'prev' => array ( 0 => 'function.mb-list-encodings.php', 1 => 'mb_list_encodings', ), 'next' => array ( 0 => 'function.mb-ord.php', 1 => 'mb_ord', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/mbstring/functions/mb-ltrim.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

mb_ltrim

(PHP 8 >= 8.4.0)

mb_ltrim — Strip whitespace (or other characters) from the beginning of a string

Descrizione

mb_ltrim(string $string, ?string $characters = null, ?string $encoding = null): string

Performs a multi-byte safe ltrim() operation. Strip whitespace (or other characters) from the beginning of a string.

Without the second parameter, mb_ltrim() 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.

Elenco dei parametri

string: The input string.
characters: Optionally, the stripped characters can also be specified using the characters parameter. Simply list all characters that need to be stripped.
encoding: Il parametro encoding è la codifica dei caratteri. Se è omesso, verrà utilizzata la codifica interna.

Valori restituiti

This function returns a string with whitespace stripped from the beginning of string.

Vedere anche:

mb_trim() - Strip whitespace (or other characters) from the beginning and end of a string
mb_rtrim() - Strip whitespace (or other characters) from the end of a string
ltrim() - Rimuove gli spazi (o altri caratteri) dall'inizio di una stringa