String Functions in PHP: Part 8

Introduction

In this article I describe the PHP string functions levenshtein, localeconv and ltrim. To learn some other math functions, go to:

1. String Functions in PHP: Part1
    
2. String Functions in PHP:Part2
    
3. String Functions in PHP:Part3
    
4. String Functions in PHP:Part4
    
5. String Functions in PHP:Part5
    
6. String Functions in PHP:Part6
    
7. String Functions in PHP:Part7

PHP levenshtein() Function

The PHP string levenshtein function calculates the levenshtein string between two strings.

Syntax

levenshtein(string1, string1, insert, replace, delete)

Parameter in levenshtein function

The parameters of the levenshtein function are:

Parameter	Description
string1	It specifies the first string to compare.
string2	It specifies the second string to compare.
insert	It defines the cost of insertion.
replace	It defines the cost of replacement.
delete	It specifies the cost of deletion.

Example

An example of the levenshtein function is: 

<?php

echo levenshtein("MCN Solution","CN Soluti")."</br>";

echo levenshtein("MCN Solution","CN Soluti",5,10,15);

?>

Output




PHP localeconv() Function

The PHP string localeconv function gets the numeric formatting information and returns an associative array containing localized numeric and monetary formatting information.

Syntax

localeconv()

Example

An example of the localeconv function is: 

<?php

$information = localeconv();

echo "<pre>";

print_r($information);

?>

Output

PHP ltrim() Function

The PHP string ltrim function will remove whitespaces or other predefined characters from the left side of a string.

Syntax

ltrim(string, CharList)

Parameter in ltrim Function

The parameters of the ltrim function are:

Parameter	Description
string	It specifies the string to check.
CharList	It specifies the characters to be removes from the string.

Example

An example of the ltrim function is: 

<?php

$str='    MCN Solution';

echo "Without using ltrim:" .$str."</br>";

echo "With--- using ltrim:" .ltrim($str)."</br>";

?>

Output




Source Code of browser window

You can see in the following image of source code that the first time we we simply show the string without the ltrim function, the original string is shown, but when we use "ltrim($str)", the white space has been removed.