如何将类中带条件分支的可变参数printf合并为单个调用？是否需优化？

Absolutely, you can clean this up into a single formatted output call while keeping it maintainable. The key is to build your format string and arguments dynamically based on the $add_info flag, which eliminates the duplicate code in your original branches.

Here's a streamlined implementation:

// Precompute common values to avoid repetition
$field_attr = esc_attr($field);
$checked = isset($this->options[$field]) && (1 == $this->options[$field]) ? 'checked="checked" ' : '';
$descr = __($this->settings_list[$field]['descr'], 'extra-settings-for-woocommerce');
$info = __($this->settings_list[$field]['info'], 'extra-settings-for-woocommerce');

// Build the base format string
$format = '<fieldset> <label><input id="%1$s" type="checkbox" name="eswc_settingz[%1$s]" value="1" %2$s />%3$s</label> </fieldset>';

// Append the optional description section if needed
if ($add_info) {
    $format .= ' <p class="description">%4$s</p>';
}

// Assemble the arguments array
$args = [$field_attr, $checked, $descr];
if ($add_info) {
    $args[] = $info;
}

// Use vprintf to handle variable argument count
vprintf($format, $args);

Why this works: #

• DRY Code: We eliminate the duplicate long format string and repeated calculations (like the checked ternary) from your original if/else branches.
• Dynamic Construction: The format string and arguments array are built only once, with the optional parts added conditionally.
• vprintf instead of printf: This function accepts an array of arguments, which lets us easily add or remove the extra %4$s argument when needed.

Is the original code "good enough"? #

Your original code functions correctly, but it has redundant code that makes it harder to maintain. If you ever need to update the fieldset/label structure, you'd have to change it in two places instead of one. The optimized version fixes that without adding unnecessary complexity.

内容的提问来源于stack exchange，提问作者Ryszard Jędraszyk