preg_match单词后跟数字

Question

我有以下字符串：

Query_time: 77.571216 Lock_time: 2.793139 Rows_sent: 20 Rows_examined: 4654071

我如何将每个数字放入变量？ 例如：

$query_time    = 77.571216;  
$lock_time     = 2.793139;
$rows_sent     = 20;
$rows_examined = 4654071;

Answer 1

if (preg_match('/Query_time: ([0-9.]+) Lock_time: ([0-9.]+) Rows_sent: ([0-9.]+) Rows_examined: ([0-9.]+)/', $string, $matches)) {
    list($query_time, $lock_time, $rows_sent, $rows_examined) =
            array_slice($matches, 1);
}

Answer 2

$str = 'Query_time: 77.571216 Lock_time: 2.793139 Rows_sent: 20 Rows_examined: 4654071';
list($null, $query_time, $lock_time, $rows_sent, $rows_examined) = preg_split('/\S+:/',$str);

Answer 3

与k102几乎相同的答案略有变化，我正在使用标志PREG_SPLIT_NO_EMPTY，所以在列表的开头不需要$ null var：）

$str = 'Query_time: 77.571216 Lock_time: 2.793139 Rows_sent: 20 Rows_examined: 4654071';
list($query_time, $lock_time, $rows_sent, $rows_examined) = preg_split('/\S+:/',$str, 0, PREG_SPLIT_NO_EMPTY);