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What do we mean by hash functions in PHP?
A hash function is any function that can be used to map data of arbitrary size to data of a fixed size. The values returned by a hash function are called hash values, hash codes, digests, or simply hashes.
string hash( string $algo , string $data [, bool $raw_output = FALSE ] )
Name of selected hashing algorithm (like "md5", "sha256", "haval160,4", etc..)
Message to be hashed.
When setting to TRUE, outputs raw binary data. FALSE outputs lowercase hexits.
<?php echo hash('sha256', 'Weelcome Tutorials Point'); ?>
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