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The strtolower Function

The strtolower function converts a string to lowercase. Works correctly only with Latin characters (single-byte characters).

Syntax

phpstrtolower(string $string): string

Example

Let's convert a string to lowercase:

php<?php
  echo strtolower('ABCDE');
?>

Code execution result:

php'abcde'

See Also

the strtoupper function,
which converts a string to uppercase
the ucfirst function,
which converts the first character to uppercase
the lcfirst function,
which converts the first character to lowercase
the ucwords function,
which converts the first letters of words to uppercase