How PHP Gets the number of file rows

It seems that there are functions that directly fetch the number of file rows.

Can I count on a row by line?

Large File Direct sys ("wc-l filename") is not high efficiency

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It seems that there are functions that directly fetch the number of file rows.

Can I count on a row by line?

Large File Direct sys ("wc-l filename") is not high efficiency

Small files directly $line = count(file('filename')) ;
Large files can be considered for SplFileObject processing.

A row count is slower when the number of rows is more, such as using fgets to read a line by default, and each row produces a function call overhead.

You can use Substr_count ($str, "\ n") to count the number of return characters.

Large files, you can read 1MB fragments each time, and then use Substr_count number of travel, and then add the results.

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