PHP strtolower() Function Usage and Example

　 　 PHP String Character String Function Manual

　 　 The strtolower() function is used to convert a string to lowercase.

Syntax

strtolower ( $string )

Definition and Usage

　Convert all letter characters in string to lowercase and return.

Related Functions:

• strtoupper() - Convert the string to uppercase

• lcfirst() - Convert the first character of the string to lowercase

• ucfirst() - Convert the first character of the string to uppercase

• ucwords() - Convert the first letter of each word in the string to uppercase

Return Value

Return String in Lowercase

Parameter

Online Example

Try the following example to convert a string to lowercase:

<?php
　　　　//The strtolower() function converts a string to lowercase
　　　echo　strtolower("www.oldtoolbag.com");
?>

Output Result

www.oldtoolbag.com

PHP String Character String Function Manual