PHP crypt() function

by Online Tutorials Library July 22, 2022

PHP string crypt() Function

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(‘tutoraspire’,’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(‘tutoraspire’,’_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(‘tutoraspire’,’$1$tutoraspire$’).”n<br>”;   }  else{  echo “MD5 not supported.n<br>”;  }  ?>  

Output:

MD5: $1$tutoraspi$/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(‘tutoraspire’,’$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(‘tutoraspire’,’$5$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 crypt() function

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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