PHP strtolower() Function

PHP String Reference PHP String Reference

Example

Convert all characters to lowercase:

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

Run example »

Definition and Usage

The strtolower() function converts a string to lowercase.

Note: This function is binary-safe.

Related functions:

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

Syntax

strtolower(string)

Parameter Description
string Required. Specifies the string to convert

Technical Details

Return Value: Returns the the lowercased string
PHP Version: 4+

PHP String Reference PHP String Reference

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