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ltrim

(PHP 4, PHP 5, PHP 7, PHP 8)

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

Опис

ltrim(string $string, string $characters = " \n\r\t\v\x00"): string

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

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

Параметри

string
The input string.
characters
Символи, що треба вилучити, можна вказати за допомогою необов'язкового параметра characters. Необхідно просто записати туди усі непотрібні символи. За допомогою .. можна задати діапазон символів за зростанням.

Значення, що повертаються

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

Приклади

Приклад #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);

?>

Поданий вище приклад виведе:

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
"

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