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You will learn how to open a file in php by using fopen function.
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in this tutorial, we show you how to read from text files.
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you will learn how to write to ext tfiles by using fwrite, file_put_contents and fputs functions.
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In this tutorial you will learn how to close the file by using fclose function in PHP
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How to write a binary data to a file in PHP.
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How to read binary data from a file in PHP with source code provided
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PHP source code which creates utilities file class for wrapping common operations on files.