If not NULL, increment the line counter.
如果不是NULL，则增加行计数器。
Just change the function call to read increment( &$counter ).
只需将这个函数调用改为increment(&$counter )。
Writes always increment the counter.
总写计数器增量。
At that point, the counter began to increment and the database was restored.
此时，计数器开始计数，数据库完成恢复。
At that point, the counter began to increment and the database was restored.
此时，计数器开始计数，数据库完成恢复。
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