ltrim
Strip whitespace (or other characters) from the beginning of a string
Description
string ltrim(string $string, string $characters = " \n\r\t\v\x00")
Strip whitespace (or other characters) from the beginning of a string.
Without the second parameter,
mb_ltrim will strip these characters:
-
" ": ASCII SP character
0x20, an ordinary space.
-
"\t": ASCII HT character
0x09, a tab.
-
"\n": ASCII LF character
0x0A, a new line (line feed).
-
"\r": ASCII CR character
0x0D, a carriage return.
-
"\0": ASCII NUL character
0x00, the NUL-byte.
-
"\v": ASCII VT
character 0x0B, a vertical tab.
Parameters
-
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.
With .. it is possible to specify an incrementing range of characters.
Return Values
This function returns a string with whitespace stripped from the
beginning of string.
Examples
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
"