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<?php $name = 'SlimDuct Tee White 3-3/4" ST100W'; $str = strtolower(trim(preg_replace('/[^a-zA-Z0-9]+/', '-', $name), '-')); echo $str. "\n"; ?>
Output for 4.3.0 - 7.1.0
slimduct-tee-white-3-3-4-st100w