I'm a bit confused as to what you mean by posting the list into a text field (do
you want to print_r the list?). But an easy, efficient (I think) way to do this
is strrpos().
<?php
function sort_extensions($a, $b) {
$apos = ($pos = strrpos($a, '.')) ? (strlen($a) - $pos) : 0;
$bpos = ($pos = strrpos($b, '.')) ? (strlen($b) - $pos) : 0;
if ($apos == $bpos) {
return 0;
}
return $apos < $bpos ? -1 : 1;
}
$files = array('test.zip',
'test.gz',
'test.z',
'test.jpeg',
'test.jpg',
'test');
usort($files, 'sort_extensions');
echo '<pre>';
print_r($files);
echo '</pre>';
?>
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