(PHP 4, PHP 5, PHP 7, PHP 8)
ltrim — Strip whitespace (or other characters) from the beginning of a string
$string, string $characters = " \n\r\t\v\0"): stringStrip whitespace (or other characters) from the beginning of a string.
stringThe input string.
characters
You can also specify the characters you want to strip, by means of the
characters parameter.
Simply list all characters that you want to be stripped. With
.. you can specify a range of characters.
This function returns a string with whitespace stripped from the
beginning of string.
Without the second parameter,
ltrim() will strip these characters:
32
(0x20)), an ordinary space.
9
(0x09)), a tab.
10
(0x0A)), a new line (line feed).
13
(0x0D)), a carriage return.
0
(0x00)), the NUL-byte.
11
(0x0B)), a vertical tab.
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);
?>
The above example will output:
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 "