SHA1(3) 								 1								   SHA1(3)

sha1 - Calculate the sha1 hash of a string

SYNOPSIS

       string sha1 (string  $str, [bool  $raw_output = false])

DESCRIPTION

	Calculates the sha1 hash of $str using the US Secure Hash Algorithm 1.

PARAMETERS

	      o $str
		- The input string.

	      o $raw_output
		-  If  the optional $raw_output is set to TRUE, then the sha1 digest is instead returned in raw binary format with a length of 20,
		otherwise the returned value is a 40-character hexadecimal number.

RETURN VALUES

	Returns the sha1 hash as a string.

EXAMPLES

       Example #1

	      A sha1(3) example

	      <?php
	      $str = 'apple';

	      if (sha1($str) === 'd0be2dc421be4fcd0172e5afceea3970e2f3d940') {
		  echo "Would you like a green or red apple?";
	      }
	      ?>

NOTES

       Note

	      Secure password hashing

	       It is not recommended to use this function to secure passwords, due to the fast nature of this  hashing	algorithm.  See  here  for
	      details.

SEE ALSO

       sha1_file(3), crc32(3), md5(3), hash(3), crypt(3), password_hash(3).

PHP Documentation Group 														   SHA1(3)