Split string into into array of character pairs [duplicate]

This question already has answers here: Closed 开发者_如何学JAVA11 years ago.

Possible Duplicate:

PHP preg_split string into letter pairs

I have an string looking like this:

$str = "How are you doing?";

How can I turn this string into an array looking like this:

$arr = array("Ho","w ","ar","r ","yo","u ","do","in","g?");

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$array = str_split($str, 2);

Documentation.

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Use str_split() function.

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Take a look at str_split(); it allows you to split a string by a definable amount of characters, so your code would look like:

$arr = str_split($str, 2);

Which will split $str into an array $arr where each element contains two characters,