PHP - Convert string to lowercase using mb_strtolower() function

In PHP we can change a given string to lowercase using the function mb_strtolower(). It returns a string with all alphabetic characters converted to lowercase characters.

Syntax

string mb_strtolower(str $string, str $encoding)

Parameters

mb_strtolower()Accepts two parameters: $string and $encoding.

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$string− Lowercase string, returns a string with all alphabetic characters converted to lowercase characters.

$encoding− This parameter is the character encoding. If absent or empty, the internal character encoding value will be used.

Return value

StringAll alphabetic characters are converted to lowercase.

Example

Live Demonstration

<?php
   // Upper and lower case characters are used to
   // convert in lower case using mb_strtoloower function
   $string = "Hello World!, Welcome to ONLINE tutorials";

   // It gives the output in lower case
   $string = mb_strtolower($string);
   echo $string;
?>

Output

It converts all characters in the given string to lowercase.

hello world! welcome to online tutorials

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