sha1 – PHP String Functions

Syntax :

sha1 ( string, raw_output );

Description :

sha1() function calculates the sha1 hash of a string.

Parameter :

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Name, Required /Optional, Value Type, Description
string , Required, String , The file for which hash is to be calculated.
raw_output, Optional, boolen, A boolean value that specifies hex or binary output format:
,,If TRUE, Raw 20 character binary format data will be returned.
,,If FALSE, Default 40 character hex number will be returned.


Output :

This function returns the string, calculated for SHA-1 hash as a string.

ChangeLog :

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Version, Description
PHP 5.1.0 , Changed the function to use the streams API. It means that you can use it with wrappers like sha1_file(‘’)

Related articles :  md5(), sha1_file(), crc32(), md5_file(), crypt().

sha1() – PHP Functions Example 1 :
$strExample = '';
echo "\n".sha1($strExample);
if (sha1($strExample) === 'fd4d899c9d520b0569dca7a67c1c5293c36d2400') {
    echo "\nWould you like to have php tutorial or html?";
$strExample = "Hi"; 
echo "\nThe string: ".$strExample."\n"; 
echo "TRUE - Raw 20 character binary format: ".sha1($strExample, TRUE)."\n"; 
echo "FALSE - 40 character hex number: ".sha1($strExample)."\n"; 

Output of above code in the browser is as below:

Would you like to have php tutorial or html?
The string: Hi
TRUE – Raw 20 character binary format: ”ÝžÁ)Dž÷òVè/¾0æÑ®@
FALSE – 40 character hex number: 94dd9e08c129c785f7f256e82fbe0a30e6d1ae40

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