PHP - Can I use eval to call a number of functions

daymobrew

I am experimenting with adding debug info to the header of a WordPress theme, using the add_action() hook.

I want to call all the WordPress conditional tags.
Currently I have code like:
[php] // WordPress conditional tags.
echo "WordPress conditional tags information.\n";
echo ' is_home(): ', is_home() ? 'true' : 'false', "\n";
echo ' is_front_page(): ', is_front_page() ? 'true' : 'false', "\n";
echo ' is_page(): ', is_page() ? 'true' : 'false', "\n";
echo ' is_page_template(): ', is_page_template() ? 'true' : 'false', "\n";
//etc...[/php]
Is there a way to use eval in a loop to call these functions?
Something like:
[php]$fns = array('is_home', 'is_front_page', 'is_page', 'is_page_template');
foreach ($fns as $fn) {
echo " $fn(): ", eval("return ${fn}()") ? 'true' : 'false', "\n";
}[/php]

ocallagh

Have a look at array_walk, array_map and call_user_func

daymobrew

ocallagh wrote: »

Have a look at array_walk, array_map and call_user_func

call_user_func did the job.
The code is much shorter now:
[php] echo "WordPress conditional tags information.\n";
$conditional_tags = array( 'is_home', 'is_front_page', 'is_page', 'is_page_template', 'is_single',
'is_singular', 'is_category', 'is_archive', 'is_author', 'is_search', 'is_404',
'is_paged', 'is_attachment', 'is_feed', 'in_the_loop', 'is_multi_author',
'is_date', 'is_year', 'is_month', 'is_day', 'is_time',
'is_tag', 'is_tax', 'is_sticky',
'is_comments_popup', 'comments_open', 'pings_open',
'is_admin');
foreach ($conditional_tags as $cond_tag) {
echo " $cond_tag(): ", call_user_func($cond_tag) ? 'true' : 'false', "\n";
}
// Template tags that do not return true/false.
$other_tags = array('get_post_type');
foreach ($other_tags as $cond_tag) {
echo " $cond_tag(): ", call_user_func($cond_tag), "\n";
}[/php]