PHP crypt Function
What is crypt Function and how it is used in string?
Explanation
In PHP, this function is used for one-way string encryption or hashing.
And also it uses different algorithms like DES,MD5, BLOWFISH, based on the values of constants used along with the crypt function.
crypt(str,salt)
In the above syntax "str" specifies the string to be encrypted,"salt" is the number of characters to be encoded.
<?php
if (CRYPT_STD_DES == 1)
{
echo "Standard DES: ".crypt("hiox india")."n<br/>";
}
if (CRYPT_EXT_DES == 1)
{
echo "Extended DES: ".crypt("hiox india")."n<br/>";
}
if (CRYPT_MD5 == 1)
{
echo "MD5: ".crypt("hiox india")."n<br/>";
}
if (CRYPT_BLOWFISH == 1)
{
echo "Blowfish: ".crypt("hiox india");
}
?> Result :
Standard DES: $1$uK..fl2.$MOB0iNfMOiXYhVyj9yCLX0
MD5: $1$6D3.Vl2.$f7oVTfnVpCWi0ufek6q5x1
In the above example, results for the supported algorithm Standard DES, MD5 is returned.
And also it uses different algorithms like DES,MD5, BLOWFISH, based on the values of constants used along with the crypt function.
| CONSTANT | DESCRIPTION |
| CRYPT_STD_DES | Standard DES-based encryption with a two character salt |
| CRYPT_EXT_DES | Extended DES-based encryption with a nine character salt |
| CRYPT_MD5 | MD5 encryption with a twelve character salt starting with $1$ |
| CRYPT_BLOWFISH | Blowfish encryption with a sixteen character salt starting with $2$ or $2a$ |
Syntax:
crypt(str,salt)
In the above syntax "str" specifies the string to be encrypted,"salt" is the number of characters to be encoded.
Example :
<?php
if (CRYPT_STD_DES == 1)
{
echo "Standard DES: ".crypt("hiox india")."n<br/>";
}
if (CRYPT_EXT_DES == 1)
{
echo "Extended DES: ".crypt("hiox india")."n<br/>";
}
if (CRYPT_MD5 == 1)
{
echo "MD5: ".crypt("hiox india")."n<br/>";
}
if (CRYPT_BLOWFISH == 1)
{
echo "Blowfish: ".crypt("hiox india");
}
?>
Standard DES: $1$uK..fl2.$MOB0iNfMOiXYhVyj9yCLX0
MD5: $1$6D3.Vl2.$f7oVTfnVpCWi0ufek6q5x1
In the above example, results for the supported algorithm Standard DES, MD5 is returned.
