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PHP string sha1_file() Function
The sha1_file() function is predefined PHP string function. It is used to calculate the SHA-1 hash of a file. It uses he US secure Hash Algorithm 1 and calculate the ha1 hash US secure Hash Algorithm 1.
The hash is a 40 character hexadecimal number.
It returns the calculated SHA-1 hash on success or False on failure.
Syntax:
| Parameter | Description | Required/Optional |
|---|---|---|
| File | Specify file to be calculated. | Required |
| raw | Specify hex or binary output format:
| Optional |
Example 1
Save it: “test.txt”
Save it: test.php
Output:
Your filename is:test.txt By using sha1_file() function:a02e266c6f3a8ff0c4250e502828c4ebf179d252
Example 2
Save it: “test.txt”
Save it: “sha1file.txt”
Save it: “index.php”
Save it: “test.php “
Output:
The file is ok.
Note: If “test.txt” has been changed (that is if the SHA-1 hash has been changed):
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