I am using WP 4.3 and I created a plugin which is used only from one single page where I have the shortcode [my_sc].
I tried do realize like this:
add_action('init', 'my_enqu_script');
function my_enqu_script(){
global $post;
$content = $post->post_content;
if(has_shortcode($content, 'my_sc')){
wp_register_script(......);
wp_localize_script(......);
wp_enqueue_script('jQuery');
wp_enqueue_script('my_script');
}
function my_func(){
//do something
}
add_shortcode('my_sc', 'my_func');
}
Unfortunatly, that (has_shortcode) does not work. Any idea?
You shouldn't be wrapping the add_shortcode() bit in the my_enqu_script() function. Instead, add the shortcode, and then hook the other function into an appropriate hook:
function my_func(){
//do something
}
add_shortcode('my_sc', 'my_func');
function my_enqu_script(){
global $post;
$content = $post->post_content;
if ( has_shortcode($content, 'my_sc') ) {
wp_register_script(......);
wp_localize_script(......);
wp_enqueue_script('jQuery');
wp_enqueue_script('my_script');
}
}
add_action('wp_enqueue_scripts', 'my_enqu_script');
You should also consider using the wp_enqueue_scripts action hook, instead of init, since init is too early for global $post; to be in scope.
You just need to create your function and call the function add_shortcode().
e.g.
function my_function(){
echo 'Test';
}
add_shortcode('my_sc', 'my_function');
Also you used : instead of ; which might have been causing the failure.
You should add this to your functions.php file or create a seperate file (best practice) and include() it.
Related
I have an addition to url e.g. /products/myproduct/?v=iphone-x/transparent/*/Green
So what I need is for wordpress to add the ?v=iphone-x/transparent/*/Green to all links on the page (only '<a href="">'s, no 'img src=""' or others)
I have managed to do that, but it's a little "dirty". Is there any neat function to add the parameter to all links?
The code I have is as follows:
function callback($buffer) {
// modify buffer here, and then return the updated code
$temp = explode('href="', $buffer);
$buffer = $temp[0];
array_shift($temp);
foreach($temp as $t){
$tt = explode('"', $t, 2);
$buffer .= 'href="'.$tt[0].'?v='.$_GET['v'].'"'.$tt[1];
}
return $buffer;
}
function buffer_start() { ob_start("callback"); }
function buffer_end() { ob_end_flush(); }
add_action('wp_head', 'buffer_start');
add_action('wp_footer', 'buffer_end');
One way you can achieve this is to hook into "the_content" filter. By using regexp with preg_replace_callback function you can get decent results.
function add_para( $content ) {
$content = preg_replace_callback(
"/href=(?>'|\")([^\"']+)(?>'|\")/",
function($m) {
print_r($m);
return "href='".$m[1]."/additional-param'";
},
$content);
return $content;
}
add_filter( 'the_content', 'add_para', 0 );
However, you might run into some issues particularly if your content is not formatted probably (extra spaces, missing tags .. etc).
So the alternative is either to us a JS approach (jQuery for example), or using PHP DOM parser like: PHP Simple HTML DOM Parser
I'm trying to do a plugin that will change the behavior of a theme.
In the theme file I have a get_template_part('libs/templates/user_menu');
I want to make my plugin to "force" the get_template_part return another slug file (a path to a file in plugin folder).
So far this is my code inside the plugin:
function wpse21352_template_part_cb( $slug )
{
if(slug == 'user_menu') {
return WP_PLUGIN_URL.'/'.$slug;
} else {
return $slug;
}
}
do_action( "get_template_part_user_menu", 'user_menu' );
add_action( 'wpse21352_template_part_cb', 'get_template_part_user_menu', 10, 1 );
First of all, get_template_part does not return anything. It loads a file from your theme based on the parameters you pass to it. The function does not support filtering, which means you can not actually overwrite what is outputted by get_template_part.
The only thing the action get_template_part_[slug] allows you to do is output something before the theme file is loaded. For example, using
function myplugin_before_login( $slug, $name ) {
echo 'Example';
}
add_action( 'get_template_part_login', 'myplugin_before_login', 10, 2 );
would output "Example" before the loading the theme file when calling get_template_part( 'login' );.
Actions and filters
In general, however, I believe you might misunderstand how actions and filters work. The WordPress Codex offers extensive information on their use and usage.
I am developing a plugin for a website.(Which is my first plugin for Wordpress)
The basic functionality is querying the database and in specific pages show the data from the database with a specific style instead of the content from the pages.
So far I managed to show some text in every specific page.
This is my code after some basic configurations:
global $wpdb;
global $wp_query;
add_action( 'wp', 'check_which_page' );
function check_which_page()
{
$page_type=get_post_type();
$page_id=get_the_ID();
//echo $page_id;
switch($page_id)
{
case 50:technologyPage();break;
case 82:medicalPage();break;
}
}
function technologyPage()
{
return print "Technology";
}
function salesPage()
{
return print "Sales";
}
function medicalPage()
{
return print "Medical";
}
I've read this post, but I couldn't solve my problem.
WordPress replace content of a page (plugin)
I already read the Wordpress documentation but I havent find anything there.
I found myself a solution, using shortcodes.
global $wpdb;
global $wp_query;
add_shortcode( 'sector_page_display', 'check_which_page' );
function check_which_page()
{
$page_type=get_post_type();
$page_id=get_the_ID();
//echo $page_id;
switch($page_id)
{
case 50:technologyPage();break;
case 82:medicalPage();break;
}
}
function technologyPage()
{
return print "Technology";
}
function medicalPage()
{
return print "Medical";
}
See that instead of add_action I changed to add_shortcode
Then on everypage I will use to show info from the database I add
[sector_page_display]
in the page, so it call my method. You can add variables in there if you want.
You'll want to run that code before WordPress has fully loaded.
Try this
global $wpdb;
global $wp_query;
add_action( 'init', 'check_which_page' );
function check_which_page()
{
$page_type=get_post_type();
$page_id=get_the_ID();
//echo $page_id;
switch($page_id)
{
case 50:technologyPage();break;
case 82:medicalPage();break;
}
}
function technologyPage()
{
return print "Technology";
}
function salesPage()
{
return print "Sales";
}
function medicalPage()
{
return print "Medical";
}
I changed the add_action to now run the code when WordPress is being initialized.
I want my plugin to register a script only in a certain page.
For example, inside my plugin file I want to write something like this:
if (is_page()) {
$pageid_current = get_the_ID();
$page_slug = get_post($pageid_current)->post_name;
if ($page_slug == 'articles'){
wp_register_script('myscript', '/someurl/main.js');
}
}
But I get the error:
is_page was called incorrectly. Conditional query tags do not work
before the query is run. Before then, they always return false. Please
see Debugging in WordPress for more information. (This message was
added in version 3.1.)
How can I, inside of a plugin, register a script in a certain page?
is_page() only work within template files.
And to use it within plugin files, you need to use it with the combination of template_redirect action hook.
This action hook executes just before WordPress determines which template page to load.
So following snippet would work:
add_action( 'template_redirect', 'plugin_is_page' );
function plugin_is_page() {
if ( is_page( 'articles' ) ) {
wp_register_script( 'my-js-handler', '/someurl/main.js', [], '1.0.0', true );
}
}
You could use is_page() after template redirect so you need to add in the hook like this :
add_action('template_redirect','your_function');
function your_function(){
if ( is_page('test') ) {
// do you thing.
}
}
You must register your script as if you want it to work everywhere.
You can de-register it after the job is done, like this:
function deregister_my_script() {
if (!is_page('page-d-exemple') ) {
wp_deregister_script( 'custom-script-1' );
}
}
add_action('wp_print_scripts', 'deregister_my_script', 100 );
I am using developing a child theme for Woothemes' Canvas.
I am trying to use functions.php in the child theme to only use actions on my custom post type.
This code doesn't seem to be working:
add_action( 'woo_post_inside_after', 'my_geo_mashup' );
function my_geo_mashup() {
echo GeoMashup::map();
if ($post->post_type == 'listings') {
//My function
}
}
add_action( 'woo_post_inside_before', 'listings_nivo' );
function listings_nivo() {
echo do_shortcode('[nivo source="current-post" ]');
if ($post->post_type == 'listings') {
//My function
}
}
So, I'm unsure how to get the above to work properly and only show these items on the custom post type, or only for the custom post type template single-listings.php (as I only want the map and slider to show on the actual post, not on the blog page (archive.php)
Rather than making the entire $post object global, you can just make $post_type global instead. Ex below.
I'm not exactly sure where that function is being loaded, but make sure you hook somewhere within the post. If the action is before, as far as I know and from experience, the post variable will be null.
Just as a test, try running the action in wp_footer Ex. add_action( 'wp_footer', 'listings_nivo' );
See if that yeilds any results.
if echoing var_dump($post) is still null, well, not sure where to go from there.
So you can try running the below, then run the action in the appropriate place if it works:
function listings_nivo() {
echo do_shortcode('[nivo source="current-post" ]');
global $post_type;
// Diagnostic purposes
echo var_dump($post_type);
if ($post_type == 'listings') {
//My function
}
}
add_action( 'wp_footer', 'listings_nivo' );
Check your error log or turn wp_debug to true in your wp-config.php file if nothing else to see if anything else is going on.
Best of luck!
Inside your function, try adding global $post;. Then to see what you are getting with $post->post_type echo it out to the screen. As long as this gives you "listings", your code should work. If not, there's probably another issue at play.