Hashing Functions play a crucial role in securing sensitive data by converting it into a fixed-size string of characters, often a hash value or checksum. PHP provides several built-in hashing functions for various purposes, such as password hashing, data integrity verification, and more.
The Hashing technique implements the hash Function to transform the data into a fixed-length string of characters, which represents the hash value. The hash function ensures the data will be encrypted in its true form, without manipulating its original form. Thus, it helps in authenticating and authorizing while the transformation of data takes place. It is a single-way transformation technique, which signifies that it is computationally infeasible to reverse the process & retrieve the original data from the hash.
There are several in-built hash algorithms, such as md5 (), sha1 (), etc, which are most commonly used for the encryption of information, are described below.
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Hashing with md5() Function
The md5() function generates a 32-character hexadecimal number representing the hash value of a given string.
Example:
