Question

It’s a simple question, but no matter where I look, I can’t seem to figure out how it works. I believe it’s taking the first character off the beginning of $variable, but how does count($variable)-1 do this?

$variable[count($variable)-1]

Full code:

$fileType  = explode('.',$_FILES['Filedata']['name']);
$fileName = str_ireplace('.jpg', '', $_FILES['Filedata']['name']);
$targetFile =  str_replace('//','/',$targetPath) . $fileName .'.'.$fileType[count($fileType)-1];

Answer 1

count($variable) returns the number of elements in an array, but array indices in PHP are zero-based: that is, a 10 element array has elements with indices 0-9.

So, $variable[count($variable) - 1] gets the last element in the array.

Although, this could’ve been done with end(): end($variable) == $variable[count($variable-1)].