PHP md5_file() Function

In this chapter you will learn:

1. Definition for PHP md5_file() Function
2. Syntax for PHP md5_file() Function
3. Parameter for PHP md5_file() Function
4. Return for PHP md5_file() Function
5. Example - Calculate the MD5 hash of the text file "test.txt"
6. Example - Store the MD5 hash of "test.txt" in a file and Test if "test.txt" has been changed

Definition

The md5_file() function calculates the MD5 hash of a file.

To calculate the MD5 hash of a string, use the md5() function.

Syntax

PHP md5_file() Function has the following syntax.

Parameter

Possible values for raw:

• TRUE - Raw 16 character binary format
• FALSE - Default. 32 character hex number

Return

Returns the calculated MD5 hash on success, or FALSE on failure.

Example 1

Calculate the MD5 hash of the text file "test.txt":

<?php/*from  jav  a2 s  .c o m*/
$filename = "test.txt";
$md5file = md5_file($filename);
echo $md5file;
?>

The code above generates the following result.

Example 2

Store the MD5 hash of "test.txt" in a file and Test if "test.txt" has been changed.

<?php//  j a  va 2s.  com
$md5file = md5_file("test.txt");
file_put_contents("md5file.txt",$md5file);

$md5file = file_get_contents("md5file.txt");
if (md5_file("test.txt") == $md5file){
  echo "The file is ok.";
}else{
  echo "The file has been changed.";
}

?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Definition for PHP mkdir() Function
2. Syntax for PHP mkdir() Function
3. Parameter for PHP mkdir() Function
4. Return for PHP mkdir() Function
5. Example - The mkdir() function creates a directory.

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PHP chdir() function

PHP chgrp() Function

PHP chmod() Function

PHP chown() Function

PHP chroot() Function

PHP clearstatcache() Function

PHP closedir() Function

PHP copy() Function

PHP delete() function

PHP dir() Function

PHP dirname() Function

PHP disk_free_space() Function

PHP disk_total_space() Function

PHP diskfreespace() Function

PHP fclose() Function

PHP feof() Function

PHP fflush() Function

PHP fgetc() Function

PHP fgets() Function

PHP fgetss() Function

PHP file() Function

PHP file_exists() Function

PHP file_get_contents() Function

PHP file_put_contents() Function

PHP fileatime() Function

PHP filectime() Function

PHP filegroup() Function

PHP fileinode() Function

PHP filemtime() Function

PHP fileowner() Function

PHP fileperms() Function

PHP filesize() Function

PHP filetype() Function

PHP flock() Function

PHP fnmatch() Function

PHP fopen() Function

PHP fpassthru() Function

PHP fprintf() Function

PHP fputcsv() Function

PHP fputs() Function

PHP fread() Function

PHP fscanf() Function

PHP fseek() Function

PHP fstat() Function

PHP ftell() Function

PHP ftruncate() Function

PHP fwrite() Function

PHP getcwd() function

PHP glob() Function

PHP is_dir() Function

PHP is_executable() Function

PHP is_file() Function

PHP is_link() Function

PHP is_readable() Function

PHP is_uploaded_file() Function

PHP is_writable() Function

PHP link() Function

PHP linkinfo() Function

PHP lstat() Function

PHP md5_file() Function

PHP mkdir() Function

PHP move_uploaded_file() Function

PHP opendir() Function

PHP parse_ini_file() Function

PHP pathinfo() Function

PHP pclose() Function

PHP popen() Function

PHP readdir() Function

PHP readfile() Function

PHP readlink() Function

PHP realpath() Function

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PHP rewind() Function

PHP rewinddir() Function

PHP rmdir() Function

PHP scandir() Function

PHP set_file_buffer() Function

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PHP stat() Function

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