如果我在这个wordpress函数中使用变量，它怎么可能不起作用？
////////
// Creating theme settings
////////
create_theme_setting('theme_social_options');
////////
// function to create theme settings easily
////////
function create_theme_setting($option_name) {
////////
// Theme settings initialize social options
////////
function theme_intialize_options() {
// If the social options don't exist, create them.
if (false == get_option($option_name)) {
add_option($option_name);
}
add_settings_section(
'social_settings_section', // ID used to identify this section and with which to register options
'Social Options', // Title to be displayed on the administration page
'social_options_callback', // Callback used to render the description of the section
$option_name //
);
add_settings_field(
'twitter',
'Twitter',
'twitter_callback',
$option_name,
'social_settings_section'
);
register_setting(
$option_name,
$option_name,
'theme_sanitize_options'
);
}
add_action('admin_init', 'theme_intialize_options');
//
//
function social_options_callback() {
echo '<p>Provide the URL to the social networks you''d like to display.</p>';
}
//
//
function twitter_callback() {
//First, we read the options
$options = get_option($option_name);
//Next, we need to make sure the element is defined in the options. If not, we'll set an empty string.
$url = '';
if(isset($options['twitter'])) {
$url = $options['twitter'];
}
//Render the output
echo '<input type="text" id="twitter" name="' . $option_name . '[twitter]" value="' . $options['twitter'] . '" />';
}
//
//
function theme_sanitize_options($input) {
$output = array();
//Loop through each of the options sanitizing the data
foreach($input as $key => $val) {
if (isset($input[$key])) {
$output[$key] = esc_url_raw(strip_tags(stripslashes($input[$key])));
}
}
//Return the new collection
return apply_filters('theme_sanitize_options', $output, $input);
}
} //End create_theme_setting
我认为您正在尝试在此处创建闭包：定义一次$option_name，然后在函数内部声明的不同函数中使用它，该函数$option_name作为参数传递。但是，我认为 PHP 不是这样工作的：函数只是在全局命名空间中声明，没有变量绑定。
若要实现所需的结果，可以将代码编写为类，并将不同的函数作为该类的方法。然后实例化该类的对象，并将 $object_name 作为属性。现在，您可以从不同的方法访问$this->object_name。请记住将对象传递给add_action，而不是类，如下所示：
// There might be syntax errors here, it's been a while since I wrote PHP code
class SettingTheme {
public function __construct($option_name)
{
$this->option_name = $option_name
add_action('admin_init', array($this, 'theme_intialize_options'));
}
public function theme_intialize_options() {
{
if (false == get_option($this->option_name)) {
add_option($this->option_name);
}
// ...
}
}
$st = new SettingTheme('theme_social_class');