Store the SHA-1 hash of "test.txt" in a file in PHP
Description
The following code shows how to store the SHA-1 hash of "test.txt" in a file.
Example
//from w ww . j a v a2s .co m
<?php
$sha1file = sha1_file("test.txt");
file_put_contents("sha1file.txt",$sha1file);
//Test if "test.txt" has been changed (that is if the SHA-1 hash has been changed):
$sha1file = file_get_contents("sha1file.txt");
if (sha1_file("test.txt") == $sha1file){
echo "The file is ok.";
}else{
echo "The file has been changed.";
}
?>
The code above generates the following result.
