mb-strtolower

mb_strtolower

Make a string lowercase

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string

mb_strtolower

string

string

string

null

encoding

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Returns string with all alphabetic characters converted to lowercase.

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string
The string being lowercased.

encoding
ENTITY

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string with all alphabetic characters converted to lowercase.

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<?php
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = mb_strtolower($str);
echo $str; // Prints mary had a little lamb and she loved it so
?>

    

<?php
$str = "Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός";
$str = mb_strtolower($str, 'UTF-8');
echo $str; // Prints τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός
?>

    

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By contrast to strtolower, 'alphabetic' is determined by the Unicode character properties. Thus the behaviour of this function is not affected by locale settings and it can convert any characters that have 'alphabetic' property, such as a-umlaut (ä).

For more information about the Unicode properties, please see ENTITY.

ENTITY

mb_strtoupper, mb_convert_case, strtolower