function missing?

[mcshen]

$my_string = "1234567890";
$count = mb_strlen($my_string);
echo "$count";

this is the code i copied from php.net

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and the manual says

mb_strlen
(PHP 4 >= 4.0.6)

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but i have php 4.23 . mb_strlen gives me "undefined function"

why is that?

i am on win2k

[drewbie]

ummm, im not that a mb_strlen exists. to count a string's length use strlen()