Two observations:

You always read in the whole file. You need to stop once you found what you were looking for. E.g. replace $in_block = 0; with last;

You need to store the new position returned from your function call and pass it back on the next call to the function. Currently, you only keep the record.

In reply to Re: I want to write a function, you call it ,it will return one matched record each time! by hdb
in thread I want to write a function, you call it ,it will return one matched record each time! by dwslovedh

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