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PHP strtolower() Function

PHP strtolower() function is used to convert a given input string into lowercase. It takes a input string as a parameter and converts all the uppercase english alphabets present in the input string to lowercase. All the other numeric characters or special characters present in the string remains as it is. It is binary-safe.

Syntax:

  strtolower( $string );

Parameter Values

Parameter	Description
string	This is a required parameter. This parameter defines the string to convert.

Here is an example of strtolower() function in PHP:

<html>
<body>

<?php
echo strtolower("PHPTPOINT");
?>
   
</body>
</html>

Output:
phptpoint

Here is an another example of strtolower() function in PHP:

<html>
<body>

<?php
$str = "Hello Everyone.. I am 21 Years Old!!";
echo strtolower($str); // Numeric & special chars remains same
?>
   
</body>
</html>

Output:
hello everyone.. i am 21 years old!!

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