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PHP judges whether the file has content, and if there is no content, copy another file to write

2022-08-10 13:39:00 【Progress a little bit every day】 

// If config.php is empty or does not exist, copy the content of the dbc.php file and write itif(@filesize(__DIR__.'/data/config.php') == 0){@copy(__DIR__.'/data/dbc.php', __DIR__.'/data/config.php');}
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