ltrim

(PHP 4, PHP 5)

ltrim — Odstranit netisknutelné znaky ze začátku řetězce

Popis

string ltrim ( string $str [, string $charlist] )

Tato funkce ořízne netisknutelné znaky ze začátku řetězce a vrací oříznutý řetězec. Netisknutelné znaky, které se v současnosti odstraňují, jsou: "\n", "\r", "\t", "\v", "\0", a prostá mezera.

Viz také: chop(), rtrim() a trim().

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Last updated: Sat, 24 Mar 2007

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ltrim

Usamah M dot Ali (usamah1228 at gmail dot com)
04-Feb-2008 11:42


For those who use right-to-left languages such as Arabic, Hebrew, etc., it's worth mentioning that ltrim() (which stands for left trim) & rtrim() (which stands for right trim) DO NOT work contextually. The nomenclature is rather semantically incorrect. So in an RTL script, ltrim() will trim text from the right direction (i.e. beginning of RTL strings), and rtrim() will trim text from the left direction (i.e. end of RTL strings).

John Sherwood
06-Aug-2006 09:13


To remove leading/trailing zeroes (example: "0123.4560"), doing a += 0 is easier than trim tricks.

jan
10-Jul-2006 11:30


if you have a numer like 0310, don't use this code:



$number = '0310';

$number = ltrim( $number, "\0x30" );

echo $number;



output: 10



for a correct output use:



$number = '0310';

$number = ltrim( $number, "0" );

echo $number;



output: 310



the "\0x30" works only with the first 32 ascii characters

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Last updated: Sat, 24 Mar 2007