PHP md5_file() function is used to generate the md5 hash of a file. It is an inbuilt function of PHP. This function returns md5 hashed on success and returns FALSE in case of failure.
1. is a file on which this function is operated. It is mandatory.
2. $format is the Boolean parameter which specifies the format of the result. It is optional. This parameter has two possible values.
a. TRUE: it represents 16 character binary format.
b. FALSE: it represents 32 characters hex number. By default it is selected.
<?php ="test.txt"; $hashed_string=md5_file(,FALSE); echo "Hashed string is : $hashed_string"; ?>