In PHP, the pack() function is a very powerful tool for packaging data into binary strings in a specified format. It is often used for network transmission, file writing, or interaction with binary protocols. Correspondingly, the unpack() function can parse the packaged binary string back to structured data. This article will introduce in-depth how to use pack() and unpack() to achieve packaging and parsing of custom structures, and help you better understand its application through specific examples.
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