Splitting a string by the number of characters in the string?

From: Date: Fri, 30 Jul 2004 07:44:19 +0000
Subject: Splitting a string by the number of characters in the string?
Groups: php.general 
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In PHP 5 there is a awesome function called str_split, is there an equivalent in PHP 4.x? I need to do the following: Split a 60 character string into 3 20 character array chunks. using str_split I could easily do it, but how do I do it in PHP 4.x? Thanks, Brent

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