When using wordpress Zaki Like Dislike Comments plugin on php 5.3 server, I received
Cannot modify header information - headers already sent by (output
started at
/home/otzyvdom/domatop.ru/docs/wp-content/plugins/zaki-like-dislike-comments/classes/class-zaki-like-dislike.php:169)
That is why Zaki Like Dislike Comments uses add_action('comment_text','ZakiLikeDislike_AddPluginHml'); hook to add like/dislike buttons in comment text. But the comment_text event occures not only when post with comments is shown but during comment form proceeding etc. And ZakiLikeDislike_AddPluginHml function makes echo instead of modifying comment content!
Finally to avoid this error you must modify main function like this:
function ZakiLikeDislike_AddPluginHml($content) {
$settings = get_option('zaki_like_dislike_options');
ob_start();
if($settings['show']) :
echo ZakiLikeDislike::getLikeDislikeHtml();
endif;
$out = ob_get_contents();
ob_end_clean();
return $out.$content;
}
Related
I have a WP shortcode that is giving me problems.
Basically, the shortcode just pulls content from another post using a couple of parameters. It then loads up a partial template.
The problem occurs in WP Admin when saving the page that contains the shortcode. When saving the page updates do in fact save correctly but the resulting page is a page that outputs the contents of the shortcode.
I'm using output buffering around get_template_part() for two reasons: 1. So I only have one instance of the template in my code - and - 2. Because the template is actually pretty substantial and appending all of it to an output variable would be a daunting task.
The shortcode works fine in every way except when saving the page.
Here is a video demonstrating the issue:
https://www.awesomescreenshot.com/video/1146323?key=103ae00d841b47cee8a902eb18c8988a
Here is my code:
function get_main_page_content( $atts ) {
$main_page_id = $atts['main_page_id'];
$section = $atts['section'];
$people_display_option = $atts['people_display_option'];
$GLOBALS['sc_display_option'] = $people_display_option;
ob_start();
if(have_rows('flexible_content', $main_page_id)):
while(have_rows('flexible_content', $main_page_id)): the_row();
if ( $section == 'agenda' ) {
get_template_part('partials/agenda');
}
if ( $section == 'people_cards' ) {
get_template_part('partials/people-cards');
}
endwhile;
endif;
ob_end_flush();
$output = ob_get_contents();
ob_end_clean();
return $output;
}
add_shortcode('get_main_page_content', 'get_main_page_content');
It looks to me like ob_end_flush() is not needed and is redundant. That might be causing the OB to send twice, resulting in that code on your screen.
I'd be curious if your problem persists if you drop that line. Also, for a very simplified version of your exact usecase, check this blog post:
https://konstantin.blog/2013/get_template_part-within-shortcodes
So I'm trying to reference custom field values in a plugin I'm building. All I need to do at this stage is grab the values and store them in variables. This is my code to get the custom field value of pageName:
<?php
global $wp_query;
$postid = $wp_query->post->ID;
$pageName = get_post_meta($postid, 'pageName', true);
wp_reset_query()
?>
So when I try to echo that out, I get nothing. I notice that my plugin runs before the head or anything else, so it's the first code in the source. My hunch is that this is due to timing and the value just isn't there yet. Is there a way to make my plugin, or this chunk of code, wait until the custom field values are there before trying to grab them?
I'm trying to avoid doing anything in the theme files so this can be a stand alone plugin that I can share.
yes, you can get the value of any post meta of the custom post type.
Just make sure that you are receiving the correct post_id in the $postid variable.
If you get the correct id of the post type you can get any meta field
Example:
global $post;
if ($post->ID) {
$media_id_meta = get_post_meta($post->ID, 'media_id', true);
}
Found the solution! I wrapped the whole thing in a function to put it in the footer, which made sure that everything it needed was there.
//----This function is wrapped around the code for my plugin
function dataLayerInject() {
*ALL MY CODE*
}
//----This drops my code into the footer
add_action('wp_footer', 'dataLayerInject');
I know we have have to return the shortcode but I'm trying to use custom templates and the shortcode is being inserted before the content in the wysiwyg editor when its actually at the end of the content:
Here is my shortcode:
add_shortcode('test_temp', 'temp_handler');
function temp_handler($atts) {
ob_start();
load_template(TEMPLATES_PATH . templates/test.php');
return ob_get_contents();
}
here is what test.php looks like:
<div class="testDiv">Here is my test template</div>
What else can I do so the short code is not inserted before the content?
Try this:
add_shortcode('test_temp', 'temp_handler');
function temp_handler($atts) {
ob_start();
load_template(TEMPLATES_PATH . templates/test.php');
$ret = ob_get_contents();
ob_end_clean();
return $ret;
}
Your idea to use output buffering to load template files is a good idea and a common practice for Wordpress shortcodes. However, it looks odd to me that you don't end the output buffering anywhere in your provided code, ob_end_clean(), which leads me to believe that your output buffering is just not setup perfectly.
Generally speaking, Wordpress will run your function and replace your shortcode tag with the output. If the output of your function is instead showing up somewhere else on the page (particularly if it is showing up above the area where it should be) then your function must be outputting content as Wordpress is running it (in your case, it must not be output buffering as expected).
Note: The load_template function uses require_once by default, which means you'll only be able to use your shortcode once on the page. Instead, I recommend using: load_template(TEMPLATES_PATH . templates/test.php', false);
i've been looking the whole day how to setcookies in wordpress. in my way i found out (using the developer toolbar) that the cookie is set but still not working.
i have 2 files the first contains the login form redirecting to another page to set the cookie and return to another page to check if it's working. domain which is tested on is like this : blog.mydomain.com. here's the setcookie file :
<?php
setcookie("user_name","test",time()+3600);
?>
and chcking the cookie like this :
if(isset($_COOKIE["user_name"])){
echo "cookie exists";
}
else{
echo "cookie doesn't exist";
}
i've read many topics about this issue but there was no clear answer.
Thanks in advance
This typically happens when you try to set a cookie after sending output to the browser. To set a cookie in WP, you should use the 'init' hook to set the cookie on init.
function set_username_cookie() {
if (!isset($_COOKIE['user_name'])) {
setcookie("user_name","test",time()+3600);
}
}
add_action( 'init', 'set_username_cookie');
well, my best way to use cookie in wordpress is this,
function set_my_cookie() {
global $post;
$post_id = $post->ID;
$cookie_name = "my_cookie";
$cookie_value = "my_cookie_val";
if (!isset($_COOKIE['my_cookie'])) {
{
setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/");
}}add_action( 'wp', 'set_my_cookie');
i used this the function to setcookie in wp hook of wordpress. the main reason of this is that we may need sometime current page or post, that we cannot access on init hook, but we can access in wp hook.
now, in a shortcode or other plugin/theme functions we may just need to check if the cookie exists or not. thats it
Another option is to use PHP's ob_start(); and ob_end_flush();.
You can find documentation on the two functions here
The way I resolved my issues was to call the two functions before and after the opening and closing html tags like this:
<?php ob_start(); ?>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<?php /* Wordpress loop and other tempate code here */ ?>
</body>
</html>
<?php ob_end_flush(); ?>
The issue I was running into was calling a global function that used PHP's setcookie(); and because WordPress processes the page progressively, the cookie couldn't be created due to the page's headers already being sent.
PHP's output buffering function forces the headers to be sent before WordPress processes the page.
Hope this helps.
I'm stuck. I posted this on WordPress.StackExchange and they suggested I try at WebApps.StackExchange, and they suggested I try here. So, apologies for the multiple posts if you follow all those!
I have a client blog using bit.ly pro to generate custom short urls (ie foo.co). I want to show the regular horizontal version of the Twitter button, with tweet-count, and have the link that goes to the post use their custom bit.ly pro url.
I have installed Joost de Valk's Bit.ly Shortlinks plugin, which successfully converts normal WP shortlinks (wp_get_shortlink()) to the custom Bit.ly pro URL elsewhere in the site, but Twitter seems to trump that and render everything with the default t.co domain instead.
I've looked at the suggestions from this question but using the # as the data-url doesn't work, and the suggested Twitter support pages don't seem to contain any info on how to get Bit.ly to work (though they say they're going to).
Here's the function I created to insert the button in my theme - any ideas on where I'm going wrong? this is used to insert the button both within the Loop and on single-post pages.
function tweet_this() {
global $post;
ob_start();
$tweet = wp_get_shortlink();
echo '<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>Tweet';
return ob_get_clean();
}
In case it helps, this function does work, except it doesn't render the tweet-count:
function tweet_this() {
global $post;
ob_start();
$tweet = sprintf( __('%1$s %2$s'), $post->post_title, wp_get_shortlink() );
echo '<a class="tweethis" href="http://twitter.com/intent/tweet?text=' . urlencode( $tweet ) . ' via #clientname">Tweet this</a>';
return ob_get_clean();
}
Let me know if you need more info - and thanks in advance for any help you can throw my way!
Michelle
function tweet_this() {
global $post;
$tweet = get_permalink(); //replace with your code
$tweetmarkup = '<script src="http://platform.twitter.com/widgets.js" type="text/javascript"></script>Tweet';
echo $tweetmarkup;
}
This works for me, but I don't have the WPShortlinks installed, so I replaced it with the permalink. You should be able to replace the permalink with your wp_get_shortlink and it should work.