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Last active July 6, 2021 19:04
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WordPress Plugin: Add custom search fields to the term editor.
<?php
/**
* Plugin Name: Term Editor Search Field
* Description: Adds Search fields to the term editor.
* Plugin URI: https://gist.github.com/birgire/22a57ad1eed45e366cc1d47575bba0b1
* Author: birgire
* Version: 1.0.2
*/
/**
* Setup custom term editor fields
*/
add_action( 'load-term.php', function()
{
/**
* Multiple Search Links
*/
$fieldGoogle = new TermEditorSearchField;
// Adjust to your needs
$fieldGoogle
->setFieldLabel( 'Search' )
->setFieldDescription( '' )
->setSearchApi( 'https://www.google.de/search/?q=TERMNAME+logo&tbm=isch' )
->setSearchApi( 'https://duckduckgo.com/?q=TERMNAME+logo' )
->setSearchApi( 'https://plus.google.com/s/TERMNAME' )
->display( 'post_tag' );
} );
/**
* Class TermEditorSearchField
* @since 1.0.0
*/
class TermEditorSearchField
{
private $urls;
private $label;
private $description;
/**
* Collect search api urls
*
* @param string $url
* @return TermEditorSearchField
*/
public function setSearchApi( $url = '' )
{
$this->urls[] = $url;
return $this;
}
/**
* Set field label
*
* @param string $label
* @return TermEditorSearchField
*/
public function setFieldLabel( $label = '' )
{
$this->label = $label;
return $this;
}
/**
* Set field description
*
* @param string $description
* @return TermEditorSearchField
*/
public function setFieldDescription( $description = '' )
{
$this->description = $description;
return $this;
}
/**
* Get Search Requests for a single term
*
* @param \WP_Term $term
* @return array $requests
*/
public function getSearchRequestsForTerm( \WP_Term $term )
{
// Generate requests
foreach( $this->urls as $key => $url )
{
$url = str_replace(
array( 'TERMNAME', 'TERMSLUG' ),
array( $term->name, $term->slug ),
$url
);
$requests[] = $url;
}
return $requests;
}
/**
* Display by hooking into the dynamic {$term}_edit_form_fields filter
*
* @param string $term
* @return void
*/
public function display( $term = 'post_tag' )
{
add_filter( "{$term}_edit_form_fields", array( $this, 'add_field' ), 10, 2 );
}
/**
* Add table field
*
* @param \WP_Term $term
* @param array $taxonomy
* @return void
*/
public function add_field( $term, $taxonomy )
{
if( ! ( $term instanceof \WP_Term ) )
return;
// Generate the search links list
$li = '';
$requests = $this->getSearchRequestsForTerm( $term );
foreach( (array) $requests as $request )
{
$li .= sprintf(
'<li><a href="%s" target="blank">%s</a></li>',
esc_url( $request ),
esc_url( $request )
);
}
// Display the table field
printf(
'<tr class="form-field term-search-wrap">
<th scope="row"><label for="search">%s</label></th>
<td>
<ul class="term-search-list">%s</ul>
<p class="description">%s</p></td>
</td>
</tr>',
esc_html( $this->label ),
$li,
esc_html( $this->description )
);
}
} // end class
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