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If you need to determine the base element from a URL or path of a file then this snippet can help you.

<?php
/*
Source: http://www.bitrepository.com/
*/
function Get_Base_From_File($file)
{
$find = '/';

$after_find = substr(strrchr($file, $find), 1);

$strlen_str = strlen($after_find);

$result = substr($file, 0, -$strlen_str);

return $result;
}

$file = 'http://www.domain.com/path/to/file.zip';

$base = Get_Base_From_File($file);

// Output: http://www.domain.com/path/to/
echo $base;
?>

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