I have a multipar from to send images but this images are optional so if the user dont send an image my code will be false because the $_FILE variables will be empty.

What I want is this: If their is an image execute the code below if not do nothing

if(isset($_FILES['file_array'])){    
    $imageName = $_FILE['file_array']['name'] ;
    $imageTempName = $_FILE['file_array']['tmp_name'] ;
    $imageBlob = file_get_contents($_FILE['file_array']['tmp_name']) ;
    $imageSize = $_FILE['file_array']['size'] ;
} 

Thank you very much!!

Your solution

You can use something like mime_content_type() to check if a file is an image.

Perhaps something like

if (stripos(mime_content_type($_FILES['file_array']['tmp_name']), "image") !== FALSE) {
    // Image sent.
}