wp_get_theme() - false positives...

sgr_wp_get_theme.php

<?php
/*
Installed themes:
Parent theme = Genesis version 1.9.1
Child theme = Child version 1.0
*/

// EXAMPLE 1:
$theme = wp_get_theme( get_template_directory() );

// var_dump $theme->get( 'Template') returns 'genesis'
// var_dump $theme->get( 'Version' ) returns bool(false)

// Using this example...
$minimum = '2.0';

$out = version_compare( $theme->get( 'Version' ), $minimum, '<' ) );

// var_dump $out returns bool(true), therefore we think installed version is good to go
// but in fact installed version is only 1.9.1 and we need 2.0
// This is because bool(false) is evaluated as "less than" $minimum, so we get a false result



// EXAMPLE 2:
$theme = wp_get_theme();

// var_dump $theme->get( 'Template') returns 'genesis'
// var_dump $theme->get( 'Version' ) returns '1.0', which is child theme version!

// Using this example...
$minimum = '1.8';

$out = version_compare( $theme->get( 'Version' ), $minimum, '<' ) );

// var_dump $out returns bool(false) but our installed G version is 1.9.1!
// This is because the compare is between child theme and genesis versions
// and returns a false result