strtolower(): to change all upper case chars to lower case

$my_str="Hello welcome to plus2net.com";
$my_str=strtolower($my_str);
echo $my_str;

hello welcome to plus2net.com

$val=strtolower($input_sting);

DEMO

Example 1: Converting Mixed Case String

<?php
$str = "HELLO World!";
echo strtolower($str);  // Output: hello world!
?>

Example 2: Handling String with Numbers

<?php
$str = "PHP 101: Programming";
echo strtolower($str);  // Output: php 101: programming
?>

Example 3: Converting a Sentence with Mixed Characters

<?php
$str = "PHP is Fun, but ALSO CHALLENGING!";
echo strtolower($str);  // Output: php is fun, but also challenging!
?>

Example 4: Converting a Multi-Line String

<?php
$str = "This is LINE 1\nTHIS IS LINE 2\n";
echo strtolower($str);  // Output: this is line 1\nthis is line 2\n
?>

Subhendu Mohapatra

Author

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