diceware/wordlist/create-wordlist.php

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#!/usr/bin/env php
<?php
/**
* This script creates the Javascript code with the wordlist based on
* the 10,000 most used English words found at https://github.com/first20hours/google-10000-english
*
* It filters out anything less than 4 characters so we get decent words.
*/
if (php_sapi_name() != "cli") {
print "This script can only be run from the command line!\n";
exit(1);
}
/**
* Read in our wordlist from Google and return an array with all words that
* passed validation.
*
* @param string $filename The filename
*
* @return array An array of words
*
*/
function readWordListGoogle($filename) {
$retval = array();
$fp = @fopen($filename, "r");
if (!$fp) {
throw new Exception("Could not open '$filename' for reading");
}
while ($line = fgets($fp)) {
$word = rtrim($line);
$len = strlen($word);
//
// Removing anything with less than 5 characters leaves us with 7781 words,
// just slightly more than the 7776 (6^5) words we need. What a happen coincidence!
//
if ($len < 5) {
continue;
}
$retval[] = $word;
}
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//
// Put the words in alphabetical order for my own sanity.
//
sort($retval);
fclose($fp);
return($retval);
} // End of readWordListGoogle()
/**
* Read in our wordlist from Google and return an array with all words that
* passed validation.
*
* @param string $filename The filename
*
* @return array An array of words
*
*/
function readWordListPeterNovig($filename) {
$retval = array();
$fp = @fopen($filename, "r");
if (!$fp) {
throw new Exception("Could not open '$filename' for reading");
}
$count = 0;
while ($line = fgets($fp)) {
$line = rtrim($line);
list($word, $freq) = explode("\t", $line);
$len = strlen($word);
//
// Keep all words between 5 and 8 characters
//
if ($len < 5 || $len > 8) {
continue;
}
$retval[] = $word;
$count++;
if ($count > 7776) {
break;
}
}
//
// Put the words in alphabetical order for my own sanity.
//
sort($retval);
fclose($fp);
return($retval);
} // End of readWordListPeterNovig()
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/**
* Turn our list of words into an array which contains the dice rolls to get
* those rolls as a key.
*
* @param array $words Our array of words
*
* @return array An array where the key is the diceroll and the value is the word.
*/
function getDiceRolls($words) {
$retval = array();
for ($i = 1; $i <= 6; $i++) {
for ($j = 1; $j <= 6; $j++) {
for ($k = 1; $k <= 6; $k++) {
for ($l = 1; $l <= 6; $l++) {
for ($m = 1; $m <= 6; $m++) {
$key = "${i}${j}${k}${l}${m}";
$retval[$key] = next($words);
}
}
}
}
}
return($retval);
} // End of getDiceRolls()
/**
* Create our Javascript
*
* @param array $rolls Our array of rolls and the word that the roll has
*
* @return string Javascript which defines an array of those rolls
*/
function getJs($rolls) {
$retval = ""
. "//\n"
. "// Our wordlist.\n"
. "//\n"
. "// Originally obtained from https://github.com/first20hours/google-10000-english\n"
. "//\n"
. "var wordlist = {\n"
;
$beenhere = false;
foreach ($rolls as $key => $value) {
if ($beenhere) {
$retval .= ",\n";
}
$retval .= "\t${key}:\"${value}\"";
$beenhere = true;
}
$retval .= "\n"
. "};\n"
. "\n"
;
return($retval);
} // End of getJs()
/**
* Our main entry point.
*/
function main() {
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//
// Read our file
//
//$filename = "google-10000-english.txt";
//$words = readWordListGoogle($filename);
$filename = "count_1w.txt";
$words = readWordListPeterNovig($filename);
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//
// Match words to dicerolls
//
$rolls = getDiceRolls($words);
//
// Get our Javascript
//
$js = getJs($rolls);
print $js;
} // End of main()
main();