Funciones de strings
PHP Manual

ltrim

(PHP 4, PHP 5)

ltrimStrip whitespace (or other characters) from the beginning of a string

Descripción

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

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

Parámetros

str

The input string.

charlist

You can also specify the characters you want to strip, by means of the charlist parameter. Simply list all characters that you want to be stripped. With .. you can specify a range of characters.

Valores devueltos

This function returns a string with whitespace stripped from the beginning of str. Without the second parameter, ltrim() will strip these characters:

Historial de cambios

Versión Descripción
4.1.0 The charlist parameter was added.

Ejemplos

Example #1 Usage example of ltrim()

<?php

$text 
"\t\tThese are a few words :) ...  ";
$binary "\x09Example string\x0A";
$hello  "Hello World";
var_dump($text$binary$hello);

print 
"\n";


$trimmed ltrim($text);
var_dump($trimmed);

$trimmed ltrim($text" \t.");
var_dump($trimmed);

$trimmed ltrim($hello"Hdle");
var_dump($trimmed);

// trim the ASCII control characters at the beginning of $binary
// (from 0 to 31 inclusive)
$clean ltrim($binary"\x00..\x1F");
var_dump($clean);

?>

El resultado del ejemplo sería:

string(32) "        These are a few words :) ...  "
string(16) "    Example string
"
string(11) "Hello World"

string(30) "These are a few words :) ...  "
string(30) "These are a few words :) ...  "
string(7) "o World"
string(15) "Example string
"

Ver también


Funciones de strings
PHP Manual