strtolower

Definition and usage

strtolower() function converts a string to lowercase.

Note: This function is binary safe.

Related functions:

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

Example

Convert all characters to lowercase:

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

Try it yourself

grammar

 strtolower ( string )