(PHP 4, PHP 5)
ltrim — Strip whitespace (or other characters) from the beginning of a string
$str
[, string $character_mask
] )Strip whitespace (or other characters) from the beginning of a string.
strThe input string.
character_mask
You can also specify the characters you want to strip, by means of the
character_mask 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 str.
Without the second parameter,
ltrim() will strip these characters:
| Version | Description |
|---|---|
| 4.1.0 |
The character_mask parameter was added.
|
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 "