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PHP string md5_file() Function
PHP string md5_file() function is in-built important function. It is used to calculate the MD5 hash of a file. It uses the RSA Data Security. It returns the md5 hash on success, or FALSE on failure.
Syntax:
| Parameter | Description | Required/Optional |
|---|---|---|
| File | Specify the file to be calculated. | Required |
| Raw | Specify the Boolean hex or binary format.
| Optional |
Example 1
Save it: “test.txt” file and past it “Hello PHP” string inside the file.
Output:
c540ce201d398a7d275c6e0c669097f3
Example 2
We can store the MD5 hash of “test.txt” in a file:
We can test if “test.txt” has been changed (if the MD5 hash has been changed):
Output:
The file is ok.
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