PHP string crypt() Function

Last Updated : 17 Mar 2025

The crypt() is predefined PHP string function. It is used to returns a hashed string by using DES, Blowfish, or MD5 algorithms.

Following are some constants of crypt() function

[CRYPT_STD_DES]
[CRYPT_EXT_DES]
[CRYPT_MD5]
[CRYPT_BLOWFISH]
[CRYPT_SHA_256]
[CRYPT_SHA_512] etc.

Syntax:

Parameter	Description	Required/Optional
str	Specify the string to be hashed	required
salt	Specify a salt sting	optional

Note: This crypt() function works with different operating System.

Example 1

 <?php
// 2 character salt
if (CRYPT_STD_DES == 1){
echo "Standard DES: ".crypt('javatpoint','jt')."\n<br>"; 
}
else{
echo "Standard DES not supported.\n<br>";
}
?>

Output:

Standard DES: jtigeEQ4GnSRg \

Example 2

<?php
// 4 character salt
if (CRYPT_EXT_DES == 1){
echo "Extended DES: ".crypt('javatpoint','_S4..java')."\n<br>";
}
else{
echo "Extended DES not supported.\n<br>";
}
?>

Output:

Extended DES: _S4..javac7kJCJPxtp6

Example 3

<?php
// 4 character salt
if (CRYPT_MD5 == 1){
echo "MD5: ".crypt('javatpoint','$1$javatpoint$')."\n<br>"; 
}
else{
echo "MD5 not supported.\n<br>";
}
?>

Output:

MD5: $1$javatpoi$/QyBQ/V7dJjcGaOq83EhL0

Note: 16 character salt starting with $5$ and the default number of rounds is 5000.

Example 4

<?php
if (CRYPT_BLOWFISH == 1){
echo "Blowfish: ".crypt('javatpoint','$2a$09$anexamplestringforsalt$')."\n<br>"; 
}
else{
echo "Blowfish DES not supported.\n<br>";
}
?>

Output:

Blowfish: $2a$09$anexamplestringforsale8idRk7z/D1GAsmHMUTi1L/e7Cjcngiy

Example 5

<?php
// 16 character salt starting with $5$. The default number of rounds is 5000.
if (CRYPT_SHA256 == 1) {
echo "SHA-256: ".crypt('javatpoint','$5$rounds=5000$anexamplestringforsalt$')."\n<br>"; }
else{
echo "SHA-256 not supported.\n<br>";
}
?>

Output:

SHA-256: $5$rounds=5000$anexamplestringf$cdf4KmhoNRhj0riAq6kpiYdPHGWOBEnPxtPxje3Fjm2

Example 6

// 16 character salt starting with $6$. The default number of rounds is 5000.
if (CRYPT_SHA512 == 1) 
{
echo "SHA-512: ".crypt('something','$6$rounds=5000$anexamplestringforsalt$'); 
}
else
{
echo "SHA-512 not supported.";
}

Output:

SHA-512: $6$rounds=5000$anexamplestringf$Oo0skOAdUFXkQxJpwzO05wgRHG0dhuaPBaOU/oNbGpCEKlf/7oVM5wn6AN0w2vwUgA0O24oLzGQpp1XKI6LLQ0

Example 7

<?php
// 16 character salt starting with $6$. The default number of rounds is 5000.
if (CRYPT_SHA512 == 1) {
echo "SHA-512: ".crypt('something','$6$rounds=5000$anexamplestringforsalt$'); 
}
else{
echo "SHA-512 not supported.";
}
?>

Output:

SHA-512: $6$rounds=5000$anexamplestringf$Oo0skOAdUFXkQxJpwzO05wgRHG0dhuaPBaOU/oNbGpCEKlf/7oVM5wn6AN0w2vwUgA0O24oLzGQpp1XKI6LLQ0

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PHP string crypt() Function

Syntax:

Note: This crypt() function works with different operating System.

Example 1

Example 2

Example 3

Note: 16 character salt starting with $5$ and the default number of rounds is 5000.

Example 4

Example 5

Example 6

Example 7

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PHP string crypt() Function

Syntax:

Note: This crypt() function works with different operating System.

Example 1

Example 2

Example 3

Note: 16 character salt starting with $5$ and the default number of rounds is 5000.

Example 4

Example 5

Example 6

Example 7

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