PHP strtolower() function

PHP String fonsi

Example

Convert all characters to lowercase:

<?php
echo strtolower("Hello WORLD.");
?>

Run instance

Definition and usage

The strtolower() function converts the string to lowercase.

Comment:This function is binary safe.

Related functions:

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

Syntax

strtolower(string)
Parameter Description
string Required. Specify the string to be converted.

Technical details

Return value: Return as lowercase string.
PHP version: 4+

PHP String fonsi