Remove all acronyms from PHP string - php

Question

I have a line of text that has acronyms inside is kind of like this...
$draft="The war between the CIA and NSA started in K2 when the FBI hired M";
I can't for the life of me figure out how to create a new string with all acronyms removed.
I need this output...
$newdraft="The war between the and started in when the hired";
The only php functions I can find only remove words that you statically declare like this!
$newdraft= str_replace("CIA", " ", $draft);
Anyone have any ideas, or an already created function?

Answer 1

Ok, let's try to write something (albeit I can't understand what for it can be useful).
<?php
function remove_acronyms($str)
{
$str_arr = explode(' ', $str);
if (empty($str_arr)) return false;
foreach ($str_arr as $index => $val)
{
if ($val==strtoupper($val)) unset($str_arr[$index]);
}
return implode(' ', $str_arr);
}
$draft = "The war between the CIA and NSA started in K2 when the FBI hired M";
print remove_acronyms($draft);
http://codepad.org/cIZSwwhV

Answer 2

Definition of an acronym: any word that is fully capitalized, and at least 2 chars long.
<?php
$draft="The war between the CIA and NSA started in K2 when the FBI hired M";
$words = explode(' ', $draft);
foreach($words as $i => $word)
{
if (!strcmp($word, strtoupper($word)) && strlen($word) >= 2)
{
unset($words[$i]);
}
}
$clean = implode(' ', $words);
echo $clean;
?>

Answer 3

Try to define an acronym. You'd have to cut some corners, but stating something like 'any single word that is smaller then 5 characters and in all capitals' should be correct for this sample, and you'd be able to write a regular expression for that.
Other then that, you could make a huge list of known acronyms and just replace those.

Answer 4

Regex to remove multiple caps and/or numbers appearing together:
$draft="The war between the CIA and NSA started in K2 when the FBI hired M";
$newdraft = preg_replace('/[A-Z0-9][A-Z0-9]+/', '', $draft);
echo $newdraft;