What does the PHP error message "Skipping due to the absence of both the zip extension and unzip command" mean?

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This error message indicates that a PHP script requires the ability to compress and decompress files using the ZIP format, but the necessary software components are not available on the server. Specifically, the script needs either the PHP zip extension or the external unzip command (which is typically part of a separate utility package, like Info-ZIP). Without one of these tools, the script cannot perform its intended functions and must skip the relevant code.