Php/docs/function.ltrim
ltrim
(PHP 4, PHP 5, PHP 7)
ltrim — Strip whitespace (or other characters) from the beginning of a string
Description
ltrim
( string $string
[, string $characters
= " \n\r\t\v\0"
] ) : string
Strip whitespace (or other characters) from the beginning of a string.
Parameters
string
- The input string.
characters
- You can also specify the characters you want to strip, by means of the
characters
parameter. Simply list all characters that you want to be stripped. With..
you can specify a range of characters.
Return Values
This function returns a string with whitespace stripped from the
beginning of string
.
Without the second parameter,
ltrim() will strip these characters:
- " " (ASCII
32
(0x20
)), an ordinary space. - "\t" (ASCII
9
(0x09
)), a tab. - "\n" (ASCII
10
(0x0A
)), a new line (line feed). - "\r" (ASCII
13
(0x0D
)), a carriage return. - "\0" (ASCII
0
(0x00
)), theNUL
-byte. - "\v" (ASCII
11
(0x0B
)), a vertical tab.
Examples
Example #1 Usage example of ltrim()
<?php$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 "