php - Directory list into associative array -

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possible duplicate:
php split string integer element , string

i have directory these files

filea10.txt fileb20.txt filec5.txt

i need read list array:

filea => 10 fileb => 20 filec => 5

what fastest way or function this?

$arr = array(); foreach (glob('*.txt') $file) {    list($name,$num) = preg_split('/\.|(?<=\d)(?=\d+)/', $file);    $arr[$name] = $num; }

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