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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PHP: Tips of the Day

Float

Example:

$float = 0.123;

For historical reasons "double" is returned by gettype() in case of a float, and not simply "float"

Floats are floating point numbers, which allow more output precision than plain integers.

Floats and integers can be used together due to PHP's loose casting of variable types:

$sum = 3 + 0.14;
echo $sum;

Output:

3.14

php does not show float as float number like other languages, for example:

$var = 1;
echo ((float) $var);

Output:

1