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function findNum($str=''){ $str=trim($str); if(empty($str)){ return ''; } $temp=array('1','2','3','4','5','6','7','8','9','0'); $result=''; for($i=0;$i<strlen($str);$i++){ if(in_array($str[$i],$temp)){ $result.=$str[$i]; } } return $result; }
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