There is no installation needed to use these functions; they are part of the PHP core.
Though this page claims hash is part of core , you will not have it if you use the "--disable-all" switch in your config. In this case it is necessary to also use "--enable-hash" to access the associated functionality.
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Though this page claims hash is part of core , you will not have it if you use the "--disable-all" switch in your config. In this case it is necessary to also use "--enable-hash" to access the associated functionality.