Answers for "how to create a hash function in php"

hash a password php

// To hash the password, use
password_hash("MySuperSafePassword!", PASSWORD_DEFAULT)
  
// To compare hash with plain text, use
password_verify("MySuperSafePassword!", $hashed_password)

php hash

hash($hashingMethod, $dataToBeHashed, $BinaryOutputMode = false)
  
some hashingMethod options:

md5
sha1
sha256
sha384
sha512