I am trying to create the simple excerpt plugin in Wordpress. I Googled a lot the allowable tag is not working, can anyone give me a suggestion how to do this?
class fpexcerpt {
function __construct() {
require_once('inc/template.php');
if(isset($_POST['reset'])) {
add_action('admin_init',array($this,'fpexcerptrestore'));
}
}
function fpexcerptdefault() {
add_option('fpexcerptcount',55);
add_option('fpexcerptmore','[...]');
}
function fpexcerptrestore() {
delete_option('fpexcerpttag');
delete_option('fpexcerptcount');
delete_option('fpexcerptmore');
fpexcerpt::fpexcerptdefault();
}
function fpexcerptadmin() {
add_submenu_page('options-general.php','Fantastic Excerpt', 'Fantastic Excerpt', 'manage_options','fpexcerptadmin', 'fpexcerptadmin_menu');
}
function fpexcerptupdate() {
register_setting('fpexcpt','fpexcerpttag');
register_setting('fpexcpt','fpexcerptcount');
register_setting('fpexcpt','fpexcerptmore');
}
function improved_trim_excerpt($text) {
global $post;
if ( '' == $text ) {
$text = get_the_excerpt();
$text = apply_filters('the_excerpt',$text);
// $text = str_replace('\]\]\>', ']]>', $text);
$text = strip_tags($text, '<a>');
$excerpt_length = 80;
$words = explode(' ', $text, $excerpt_length + 1);
if (count($words)> $excerpt_length) {
array_pop($words);
array_push($words, '[...]');
$text = implode(' ', $words);
}
}
return $text;
}
}
$new = new fpexcerpt();
register_activation_hook(__FILE__,array('fpexcerpt','fpexcerptdefault'));
//remove_all_filters('wp_trim_excerpt');
//add_filter('get_the_excerpt', array('fpexcerpt','fpexcerptprocess'));
remove_filter('get_the_excerpt',array('fpexcerpt','wp_trim_excerpt'));
add_filter('get_the_excerpt', array('fpexcerpt','improved_trim_excerpt'));
add_action('admin_menu',array('fpexcerpt','fpexcerptadmin'));
add_action('admin_init',array('fpexcerpt','fpexcerptupdate'));
?>
EDIT:
The first image is show the excerpt content when i click the particular post its getting link but not in excerpt even if i add the excerpt plugin (mine)
Error: Maximum function nesting level of '100' reached, aborting! in E:\wamp\www\fp\wp-includes\cache.php on line 453
Based on the error you've reported above, I can surmise you're stuck in a recursive function call loop. In other words, a function you've written is ( at some point in the callstack ) calling itself ( or a function that calls it ). Picture an infinite loop, but with functions.
I can't determine where this is occurring since I can't see all of your code.
Related
I am trying to debug if parameters are added to my shortcode. Currently, when I add a shortcode to my page and don't add a parameter it errors saying
Updating failed
But I would like to have a more detailed error. How would I do that? I'm working with code snippets and this is a front-end snippet. I noticed that I do get the error when I run the snippet in the back-end but then my entire WP UI disappears which isn't nice. Any tips?
<?php
add_shortcode('taxonomy_dropdown', 'do_taxonomy_dropdown');
function do_taxonomy_dropdown($atts = [])
{
$atts = array_change_key_case((array) $atts, CASE_LOWER);
if(do_validate_parameters($atts)){return;}
$taxonomy = $atts['taxonomy'];
$dependent = $atts['dependent'];
return;
}
function do_validate_parameters($atts = [])
{
$has_parameters = true;
if(!isset($atts['taxonomy'])){
echo "You forgot to add the taxonomy parameter.";
$has_parameters = false;
}
if(!isset($atts['dependent'])){
echo "You forgot to add the dependent parameter.";
$has_parameters = false;
}
return $has_parameters;
}
I think the issue you're having is with the initial portion not checking for the set variable. When I run it with error logging on I see that as an issue. Try this and see if it stops the issue.
add_shortcode('taxonomy_dropdown', 'do_taxonomy_dropdown');
function do_taxonomy_dropdown($atts = [])
{
$atts = array_change_key_case((array) $atts, CASE_LOWER);
if(do_validate_parameters($atts)){return;}
if ( isset($atts['taxonomy'])){
$taxonomy = $atts['taxonomy'];
}
if ( isset($atts['dependent'])){
$dependent = $atts['dependent'];
}
return;
}
function do_validate_parameters($atts = [])
{
$has_parameters = true;
if(!isset($atts['taxonomy'])){
echo "<p>You forgot to add the taxonomy parameter.</p>";
$has_parameters = false;
}
if(!isset($atts['dependent'])){
echo "<p>You forgot to add the dependent parameter.</p>";
$has_parameters = false;
}
return $has_parameters;
}
I have an addition to url e.g. /products/myproduct/?v=iphone-x/transparent/*/Green
So what I need is for wordpress to add the ?v=iphone-x/transparent/*/Green to all links on the page (only '<a href="">'s, no 'img src=""' or others)
I have managed to do that, but it's a little "dirty". Is there any neat function to add the parameter to all links?
The code I have is as follows:
function callback($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 have lots of videos in the directory "video" in my WordPress installation.
They all play nice using the MediaElement.js plugin, but is it also possible to play a random clip from this directory? For example using a shortcode that directs to the directory (and not to a specific video), something like
[video src="http://www.domain.com/wordpress/wp-content/video" random="true"]
That would be great!
This should be possible.
What you might want to do is use AJAX to generate the div containing your video player. If you do this, you can delete/recreate the player very easily.
After that what you'd need is a shortcode definition which feeds a directory string value and a boolean value into whichever function you attach to the shortcode handler.
For Instance
$defaultDirectory=site_url()+"/videos/";
add_shortcode( 'video', 'videoDiv' );
function videoDiv( $shortcodeAttributeList )
{
extract( shortcode_atts( array(
'src' => $defaultDirectory,
'random' => true, /*set default values, use lowercase*/
), $shortcodeAttributeList ) );
if($random)
{
$numFiles=fileCounter($src);
$choice=rand(1, $numFiles);
}
$output='<div id="videoPlayer" class="player">';
// Continue by making a string which spans from <div> to </div>
return $output; //a div
}
Also from http://php.net/manual/en/function.readdir.php
<?php
/**
* get the number of files within a given dir
*/
function fileCounter($dir){
$counter = 0;
if ($handle = opendir($dir)) {
//echo "Directory handle: $handle\n";
//echo "Files:\n";
/* This is the correct way to loop over the directory. */
while (false !== ($file = readdir($handle))) {
//echo "<BR>".$counter." - $file";
$counter++;
}
closedir($handle);
}
$counter -= 1; // in order to exclude '.' and '..', as well as start the counter on 1
return $counter;
}
/**
* get the filename in a giver dir, starting the first file with the index 1
*/
function fileNameByIndex($dir, $fileIndex){
$counter = 0;
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
$counter++;
if($counter - 2 == $fileIndex)
return $file;
}
closedir($handle);
}
return "";
}
}
The length of the excerpt in wordpress is 55 words by default.
I can modify this value with the following code:
function new_excerpt_length($length) {
return 20;
}
add_filter('excerpt_length', 'new_excerpt_length');
So, the following call will return just 20 words:
the_excerpt();
But I can't figure out how could I add a parameter to obtain different lengths, so that I could call, for example:
the_excerpt(20);
the_excerpt(34);
Any ideas? Thanks!
uhm, answering me again, the solution was actually quite trivial. it's not possible, as far as i know, to pass a parameter to the function my_excerpt_length() (unless you want to modify the core code of wordpress), but it is possible to use a global variable. so, you can add something like this to your functions.php file:
function my_excerpt_length() {
global $myExcerptLength;
if ($myExcerptLength) {
return $myExcerptLength;
} else {
return 80; //default value
}
}
add_filter('excerpt_length', 'my_excerpt_length');
And then, before calling the excerpt within the loop, you specify a value for $myExcerptLength (don't forget to set it back to 0 if you want to have the default value for the rest of your posts):
<?php
$myExcerptLength=35;
echo get_the_excerpt();
$myExcerptLength=0;
?>
There is no way to do this as far as I have found using the_excerpt().
There is a similar StackOverflow question here.
The only thing I have found to do is write a new function to take the_excerpt()'s place. Put some variation of the code below into functions.php and call limit_content($yourLength) instead of the_excerpt().
function limit_content($content_length = 250, $allowtags = true, $allowedtags = '') {
global $post;
$content = $post->post_content;
$content = apply_filters('the_content', $content);
if (!$allowtags){
$allowedtags .= '<style>';
$content = strip_tags($content, $allowedtags);
}
$wordarray = explode(' ', $content, $content_length + 1);
if(count($wordarray) > $content_length) {
array_pop($wordarray);
array_push($wordarray, '...');
$content = implode(' ', $wordarray);
$content .= "</p>";
}
echo $content;
}
(Function credit: fusedthought.com)
There are also "advanced excerpt" plugins that provide functionality like this you can check into.
Thanks for your answer, thaddeusmt.
I am finally implementing the following solution, which offers a different length depending on the category and a counter ($myCounter is a counter within the loop)
/* Custom length for the_excerpt */
function my_excerpt_length($length) {
global $myCounter;
if (is_home()) {
return 80;
} else if(is_archive()) {
if ($myCounter==1) {
return 60;
} else {
return 25;
}
} else {
return 80;
}
}
add_filter('excerpt_length', 'my_excerpt_length');
I'm quite new to this (understanding the WP Guts), and I wanted to understand the Hooks and Filters better, I can't get it right from Codex.
I did a simple test,
the idea is to override the get_title() method in order to erase the "Protected: " sentence from the title if the page is protected, there is a protected_title_format filter, and I thought using it ...
that line in post-template.php specifies:
$protected_title_format = apply_filters('protected_title_format', __('Protected: %s'));
for what I could get from CODEX, I need to remove that filter and add my own, like
remove_action('protected_title_format');
apply_filters('protected_title_format', __('MY OWN PAGE Protected: %s'));
using, off course something like
// Removing action
function remove_title_action() {
remove_action('protected_title_format','get_the_title',3);
}
add_action('init','remove_title_action');
// Adding custom function
add_action('protected_title_format','fancy_title', 3, 4);
function fancy_title($id = 0) {
$post = &get_post($id);
$title = $post->post_title;
echo "I'm the king of the world!... >" . $title . "< & >" . $post . "<";
if ( !is_admin() ) {
if ( !empty($post->post_password) ) {
$protected_title_format = apply_filters('protected_title_format', __('MY OWN PAGE Protected: %s'));
$title = sprintf($protected_title_format, $title);
}
}
return apply_filters( 'the_title', $title, $post->ID );
}
I can get the echo to output, but I dont get the $id (and for that, no $title or $post), this method is a copy of get_title() stripping out everything but the protected part string.
Can anyone care to explain me how this works?
Thank you
P.S. I want to learn, this is the idea of this question, not someone to tell me "Hey, just go to post-template.php and change it", because then I would ask "How about when I update WP...?" !
You can actually do this much more simply than what you're trying. You're on the right track though.
Basically, what you want to do is create your own function that will strip out the "Protected: " part of the WordPress titles. The easiest way to do this is to simply create a function that uses preg_replace() to search for the "Protected: " text and strip it. You could just as easily have it auto-replace the string with your own text.
Here's a sample function that does that. We're taking the $title as a parameter and returning the modified version of it.
function remove_protected_text($title) {
$match = '/Protected: /';
$replacement = '';
$title = preg_replace($match, $replacement, $title);
return $title;
}
The next thing we want to do is actually add our function to a filter hook. The filter hook that we're interested in in this cases is 'the_title'. So, we add the following line below the function we just wrote:
add_filter( 'the_title', 'remove_protected_text', 10);
This adds our function remove_protected_text() to the 'the_title' filter. In this case I've used the third argument to give our filter a priority of 10. This is totally optional, but I figure this filter is a pretty low priority.
So all together our code should look like this:
function remove_protected_text($title) {
$match = '/Protected: /';
$replacement = '';
$title = preg_replace($match, $replacement, $title);
return $title;
}
add_filter( 'the_title', 'remove_protected_text', 10);
Adding that code to the functions.php file in your theme will allow it to work. You can write filters like this for most of the parts of WordPress that output text.
Update
Here's a revised version of the function that should get the translated string of "Protected: " and remove it:
function remove_protected_text($title) {
$protected = __('Protected: %s');
$protected = preg_replace('/ %s/', '', $protected);
$match = "/${protected}/";
$replacement = '';
$title = preg_replace($match, $replacement, $title);
return $title;
}
add_filter( 'the_title', 'remove_protected_text');
Basically the only change here is that we are using the __() function to translate the protected string and then striping out the extra bits. This is kind of hackish, and I'm sure there's a better way to do it, but it does work in my testing.
I tested this out on a Spanish version of WordPress and it worked, so let me know if it works for your project.