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<?php $strings=['12jan','12 jan','12 jan','12/jan','12//jan','12/jan','12*/jan','12*//jan']; foreach($strings as $string){ var_export(preg_split('~(?<=[0-9])[*/ ]*(?=[a-z]+)~i',$string)); echo "\n"; var_export(preg_split('~\d+\K[*/ ]*~',$string)); echo "\n"; var_export(preg_match('~(\d+)[/* ]*([a-z]+)~i',$string,$out)?array_slice($out,1):'fail'); echo "\n"; var_export(preg_match('~(\d+)[/* ]*(.+)~',$string,$out)?array_slice($out,1):'fail'); echo "\n"; var_export(preg_match_all('~\d+|[a-z]+~i',$string,$out)?$out[0]:'fail'); echo "\n---\n"; }

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