我有一个函数，我试图在其中获取一个数组，以便在回调中使用它来动态添加过滤器。
下面是我需要从中检索数组键的函数（在$classes 变量）：
function bw_add_markup_class( $attr, $context ) {
$classes = array(
\'nav-primary\' => \'navbar navbar-inverse navbar-static-top\',
\'nav-secondary\' => \'navbar navbar-default navbar-static-top\',
\'site-header\' => \'navbar navbar-static-top\'
);
$classes = apply_filters (\'bw_custom_classes\', $classes, $context, $attr);
$value = isset( $classes[ $context ] ) ? $classes[ $context ] : array();
if ( is_array( $value ) ) {
$classes_array = $value;
} else {
$classes_array = explode( \' \', (string) $value );
}
$classes_array = array_map( \'sanitize_html_class\', $classes_array );
$attr[\'class\'] .= \' \' . implode( \' \', $classes_array );
return $attr;
}
Originally I was doing this to add my filters:
add_filter(\'genesis_attr_nav-primary\', \'bw_add_markup_class\', 10, 2);
add_filter(\'genesis_attr_nav-secondary\', \'bw_add_markup_class\', 10, 2);
add_filter(\'genesis_attr_site-header\', \'bw_add_markup_class\', 10, 2);
然而，我开始向$classes数组添加更多值，并且我还希望能够通过
bw_custom_classes 不必写
add_filter 为了他们。
这就是我被困的地方。虽然下面是一个改进，但它仍然没有完成我试图做的事情。
$classes_keys = array(
\'nav-primary\',
\'nav-secondary\',
\'site-header\'
);
foreach($classes_keys as $context) {
$context = "custom_attr_$context";
add_filter($context, \'bw_add_markup_class\', 10, 2);
}
我的最佳猜测是：虽然我的php知识已经达到极限，但我还是希望能够做到这样。
add_action(\'after_setup_theme\', \'add_filters_to_front\');
function add_filters_to_front() {
$filters = bw_add_markup_class();
foreach(array_keys($filters) as $context){
$context = "genesis_attr_$context";
add_filter($context, \'bw_add_markup_class\', 10, 2);
}
}
最合适的回答,由SO网友:Fabien Quatravaux 整理而成
我认为你的思路是对的，但最后一部分很混乱。您正在使用bw_add_markup_class 功能有两个不同的用途：
要返回要添加的类，列出要调用的筛选器的上下文，如果我很清楚您想要执行的操作，您需要一个函数来返回数组，然后分别应用修改：
<?php
/**
* Default array of classes to add separated from bw_add_markup_sanitize_classes()
* This allows it to be used several places
*/
function bw_merge_genesis_attr_classes()
{
$classes = array(
\'content-sidebar-wrap\' => \'row\',
\'content\' => \'col-xs-12 col-sm-8 col-lg-7 col-lg-offset-1\',
\'sidebar-primary\' => \'hidden-xs col-sm-4 col-lg-3\',
\'archive-pagination\' => \'clearfix\',
\'entry-content\' => \'clearfix\',
\'entry-pagination\' => \'clearfix\',
\'sidebar-secondary\' => \'\',
);
if (has_filter(\'bw_add_classes\')) {
$classes = apply_filters(\'bw_add_classes\', $classes);
}
return $classes;
}
/**
* Adds Filters Automatically from Array Keys
*/
add_action(\'genesis_meta\', \'bw_add_array_filters_genesis_attr\');
function bw_add_array_filters_genesis_attr()
{
$filters = bw_merge_genesis_attr_classes();
foreach(array_keys($filters) as $context) {
$context = "genesis_attr_$context";
add_filter($context, \'bw_add_markup_sanitize_classes\', 10, 2);
}
}
/**
* Clean classes output
*/
function bw_add_markup_sanitize_classes($attr, $context)
{
$classes = array();
if (has_filter(\'bw_clean_classes_output\')) {
$classes = apply_filters(\'bw_clean_classes_output\', $classes, $context, $attr);
}
$value = isset($classes[$context]) ? $classes[$context] : array();
if (is_array($value)) {
$classes_array = $value;
}
else {
$classes_array = explode(\' \', (string)$value);
}
$classes_array = array_map(\'sanitize_html_class\', $classes_array);
$attr[\'class\'].= \' \' . implode(\' \', $classes_array);
return $attr;
}
/**
* Adds classes array to bsg_add_markup_class() for cleaning
*/
add_filter(\'bw_clean_classes_output\', \'bw_modify_classes_based_on_extras\', 10, 3);
function bw_modify_classes_based_on_extras($classes, $context, $attr)
{
$classes = bw_merge_genesis_attr_classes($classes);
return $classes;
}
Usage in template or elsewhere:
现在您可以将类添加到数组中进行清理，它们也将自动添加到过滤器中。。。
add_filter(\'bw_add_classes\', \'bw_custom_example\');
function bw_custom_example($classes) {
$new_classes = array(
\'nav-secondary\' => \'navbar navbar-inverse navbar-static-top nav-blue\',
\'entry\' => \'panel panel-default\',
);
return wp_parse_args($new_classes, $classes);
}
