Code for generation broad, exact and phrase match keywords with optional modified broad combinations

mung_keywords.php

<?php
    if(isset($argv[2]) && $argv[2])
        define('MODIFIED_BROAD',1);
    else
        define('MODIFIED_BROAD',0);

    $lines = file($argv[1],FILE_IGNORE_NEW_LINES);
    $res = array();

    foreach($lines as $line)
    {
        $res[] = $line;
        $res[] = '"'.$line.'"';
        $res[] = '['.$line.']';
        $split = explode(' ',$line);

        if(MODIFIED_BROAD)
        {
            $length = count($split);
            $new_terms = array();
            //WE'RE GOING TO SLICE THE ARRAY FROM LENGTH 1 TO LENGTH OF THE
            //TERMS
            for($i = 1; $i <= $length ;$i++ )
                sliceLengths($split,$new_terms,$i);
    
            foreach($new_terms as $nt)
            {
                $rsplit = explode(' ',$nt);
                $replace = '+'.implode(' +',$rsplit);
                $res[] = str_replace($nt,$replace,$line);
            }
        }
    }
    
    die(implode(PHP_EOL,$res));

    function sliceLengths($source,&$destination,$length)
    {
        $overall_length = count($source);
        $moves = ($overall_length - $length)+1;

        for($i = 0;$i < $moves;$i++)
        {
            $cur_array = array();
            $cur_slice = array_slice($source,$i,$length);

            foreach($cur_slice as $piece)
                $cur_array[] = $piece;

            $destination[] = implode(' ',$cur_array);
        }
    }

If you save that to a file mung_keywords.php you can call it from the command line like this:

php mung_keywords.php filename.txt

where filename.txt contains your keyphrases, one per line, for example the file:

this
is my
research data

would produce the output:

this
"this"
[this]
is my
"is my"
[is my]
research data
"research data"
[research data]

if you pass in the optional 2nd parameter like this:

php mung_keywords.php filename.txt true

then the output includes all possible broad match modified variants:

this
"this"
[this]
+this
is my
"is my"
[is my]
+is my
is +my
+is +my
research data
"research data"
[research data]
+research data
research +data
+research +data