Fix PHP version check

Author: chesio

php/commands/src/CLI_Command.php

@@ -107,7 +107,7 @@ public function info( $_, $assoc_args ) {
 
 		// php_uname() $mode argument was only added with PHP 7.0+. Fall back to
 		// entire string for older versions.
-		$system_os = PHP_MAJOR_VERSION >= 7
+		$system_os = PHP_MAJOR_VERSION < 7
 			? php_uname()
 			: sprintf(
 				'%s %s %s %s',