Multiple if Statements issue - php

Question

I am having a problem with multiple if statements. I am using && but it seems to only work for the first statement.
The code is like such:
global $post;
$args = array( 'post_id' => $post->ID );
$comment = get_comments( $args );
$user = wp_get_current_user();
if ( 3 <= count( $comment ) && $post->post_author == $user->ID) {
echo do_shortcode( '[button]' );
} else {
comment_form();
}
It basically stats that if there is less than 3 comments then show the comment form but if there is more than 3 and is the post author then show a button. The button shows but only if there are more than 3 comments. It doesn't check if it is only the post author or not, like I want it to.

Answer 1

What you are describing are two cases in which the button should be showed. So there have to be two ways to get into the if-block. You have to refactor your if-statement with the logical or-operator ||.
for example:
if($post->post_author == $user->ID || 3 <= count($comment)) {
echo do_shortcode( '[button]' );
} else {
comment_form();
}

Answer 2

I had to change the code like so to get it to work.
global $post,$current_user;
$args = array( 'post_id' => $post->ID );
$comment = get_comments( $args );
get_currentuserinfo();
if ($post->post_author == $current_user->ID ) {
echo do_shortcode( '[button]' );
} elseif ( 3 <= count( $comment ) ) {
// blank
} else {
comment_form();
}