php 正则表达式 字符串中提取带小数点的数字?答:preg_match_all('/(\d+)\.(\d+)/is', $total, $arr);var_export($arr);array (0 => array (0 => '42.234',1 => '53.218',2 => '97.164',3 => '311.151',4 => '125.042',5 => '84.270',6 => '60.227',7 => '134.400',),1 => array (0 => '42'...