w3resource

PHP: ltrim() function

Description

The ltrim() function is used to remove white spaces or other predefined characters form the left side of the string.

Version:

(PHP 4 and above)

Syntax:

ltrim(string_name, char_list)

Parameter:

Name Description Required /
Optional		 Type
string_name The string that will be trimmed. Required String
char_list Specifies which character to remove from the string. Without this parameter, the function removes the following characters.
' ' an ordinary space.
"\0" - the NUL-byte.
"\t" - tab.
"\n" - line feed.
"\x0B" - a vertical tab.
"\r" - a carriage return.		 Optional String

Return value:

This function returns a string with whitespace stripped from the beginning of string_name. Without the second parameter, ltrim() will strip these characters:

Value Type: String.

Pictorial Presentation

php-string-ltrim()

Example:

<?php
$text1="w3resource.com  ";
$text2="\t\tw3resource.com";
$text3="\t\tw3resource.com\x0A";
$text4="Good Morning";
$trimmed_text=ltrim($text1);
var_dump($trimmed_text);
echo '<br>';
$trimmed_text=ltrim($text2);
var_dump($trimmed_text);
echo '<br>';
$trimmed_text=ltrim($text3);
var_dump($trimmed_text);
echo '<br>';
$trimmed_text=ltrim($text1,'w3');
var_dump($trimmed_text);
echo '<br>';
$trimmed_text=ltrim($text4,"Go");
var_dump($trimmed_text);
?>

Output :

string(16) "w3resource.com  "
string(14) "w3resource.com" 
string(15) "w3resource.com  " 
string(14) "resource.com  " 
string(9) "d Morning"

View the example in the browser

See also

PHP Function Reference

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Next: md5_file



PHP: Tips of the Day

Rotates the array (in left direction) by the number of shifts

Example:

<?php
function tips_rotate($array, $shift = 1)
{
  for ($i = 0; $i < $shift; $i++) {
    array_push($array, array_shift($array));
  }

  return $array;
}

print_r(tips_rotate([1, 3, 5, 2, 4]));
print_r(tips_rotate([1, 3, 5, 2, 4], 2));

?>

Output:

Array
(
    [0] => 3
    [1] => 5
    [2] => 2
    [3] => 4
    [4] => 1
)
Array
(
    [0] => 5
    [1] => 2
    [2] => 4
    [3] => 1
    [4] => 3
)