wp-admin/install.php is an unintelligible page

When I go to wp-admin/install.php I see unintelligible gibberish. First there is “>”, then the WordPress logo, then two text fields with the strings “<?php echo ( isset($_POST[‘weblog_title’]) ? esc_attr($_POST[‘weblog_title’]) : ” ); ?>” and “<?php echo ( isset($_POST[‘admin_email’]) ? esc_attr($_POST[‘admin_email’]) : ” ); ?>” and a checkbox and a button with an unintelligible text, then stuff like:

‘.__(‘Already Installed’).’

‘.__(‘You appear to have already installed WordPress. To reinstall please clear your old database tables first.’).’
‘);} $php_version = phpversion(); $mysql_version = $wpdb->db_version(); $php_compat = version_compare( $php_version, $required_php_version, ‘>=’ ); $mysql_compat = version_compare( $mysql_version, $required_mysql_version, ‘>=’ ) || file_exists( WP_CONTENT_DIR . ‘/db.php’ ); if ( !$mysql_compat && !$php_compat ) $compat = sprintf( __(‘You cannot install because WordPress %1$s requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.’), $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version ); elseif ( !$php_compat ) $compat = sprintf( __(‘You cannot install because WordPress %1$s requires PHP version %2$s or higher. You are running version %3$s.’), $wp_version, $required_php_version, $php_version ); elseif ( !$mysql_compat ) $compat = sprintf( __(‘You cannot install because WordPress %1$s requires MySQL version %2$s or higher. You are running version %3$s.’), $wp_version, $required_mysql_version, $mysql_version ); if ( !$mysql_compat || !$php_compat ) { display_header(); die(‘

and so on. What’s wrong? My host is webol.