Get all array keys that is not equal to X - php

Question

I have several files uploaded with a form that is processed by a PHP script. There are several "categories" that I need to have handles separate ways. In other words, I need some of the files in the $_FILES array to be stored someplace, and some others stored in other places.
So what I need is all files (array keys) that are not $_FILES['filename_form'] to be stored / used separably.
The reason why I need this is because the amount of files being uploaded are dynamic, but always either $_FILES['filename_type1'] or $_FILES['filename_type2_*] where * is a number that increments when more files are input from the form (dynamically)
Might be a very simple solution, either I'm too tired or maybe I've been staring too much at the code, but all I know is I need a solution before tomorrow morning, so it's time sensitive =P
Appreciate all the help I can get.
Thank you!

Answer 1

$files = array();
$filenames = array();
foreach($_FILES as $name => $fileInfo)
{
if($name != 'filename_form')
{
$files[$name] = $fileInfo;
$filenames[] = $name;
}
}

Answer 2

How about:
foreach ( $_FILES as $key => $value )
if ( preg_match ( '/type2/', $key ) )
// do something with the type2
else if ( preg_match ( '/type1/', $key ) )
// do something with these

Answer 3

<?php
foreach ($_FILES as $key => $value) {
$a = explode('_', $key);
$defaultDir = 'myDefaultDirOrPathOrWhatever';
if ($a[1] == 'type2') {
$defaultDir = 'myOtherDirWhenMultipleFiles';
$incrementPassed = $a[2];
}
if (isset($incrementPassed)) unset($incrementPassed);
}

Answer 4

Here is an alternate way
$keys = array_keys($thearray);
$filteredArray = array_filter($keys, 'fiterKeys');
function filterKeys($item) {
if($item != 'valuetocheck') return true;
else return false;
}

Answer 5

$type1_files = array(); // Array of files of first type
$type2_files = array(); // Array of files of second type
$underfined_files = array(); // Array of files of unnormal type (who knows :-P)
foreach($_FILES as $name => $value){
if($name == 'type1'){
$type1_files[] = $value;
}
elseif($name == 'type2'){
$type2_files[] = $value;
}
else{
$undefined_files[] = $value;
}
}
After foreach you'll have your files devided into arrays, which you can process later as you wish

Answer 6

<?php
$files = array();
foreach ($_FILES as $filename => $fileinfo) {
if (strpos($filename, 'form') !== false) {
$files[$name] = $fileinfo;
unset($_FILES[$name]);
}
}
?>
Fastest method I can think of, should be faster then any of the previous answers.