82 lines
2.5 KiB
PHP
82 lines
2.5 KiB
PHP
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<?php
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/**
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* Makes a filter for the custom post type ajut and its custom fields
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*
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* references:
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* basic start
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* https://www.advancedcustomfields.com/resources/creating-wp-archive-custom-field-filter/
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*
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* checkbox adaptation query filter
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* https://barn2.com/blog/querying-posts-by-custom-field-acf/#array-based-fields
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*
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* @package Xarxaprod_wp_plugin
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*/
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// define the filter fields
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// array of filters (field key => field name)
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$GLOBALS['my_query_filters'] = array(
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'fundtarget' => 'os_fund_target',
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'fundsource' => 'os_fund_source',
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'fundfield' => 'os_fund_field'
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);
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$GLOBALS['my_query_filters_dates'] = array(
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'fundapplybegin' => 'os_fund_apply_begin',
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'fundapplyend' => 'os_fund_apply_end'
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//'fundcall' => 'os_fund_call',
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);
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// action
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add_action('pre_get_posts', 'my_pre_get_posts',10,1);
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function my_pre_get_posts( $query ) {
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// bail early if is in admin
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if( is_admin() ) { return; }
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// bail early if not main query or plugin $the_query_ajut
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// - allows custom code / plugins to continue working
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if( !$query->is_main_query() ) return;
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// loop over filters
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foreach( $GLOBALS['my_query_filters'] as $key => $fieldname)
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{
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// continue if not found in url
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if( empty($_GET[ $fieldname ]) ) { continue; }
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// get original meta query
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$meta_query = [];
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$meta_query[] = $query->get('meta_query');
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$meta_query[] = array('relation' => 'OR');
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// get the values for this filter
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// eg: http://domain.tdl/ajut/?os_fund_target=autonoma,entitat-publica
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$filtervalues= explode(',', $_GET[ $fieldname ]);
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// loop retreived values from checkboxes and filter them with REGEXP
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// http://domain.tdl/ajut/?os_fund_target=autonoma&os_fund_field=circi
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// http://domain.tdl/ajut/?os_fund_target=autonoma,entitat-publica&os_fund_field=dansa
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foreach( $filtervalues as $filteredvalue )
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{
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// they are array based fields
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// https://barn2.com/blog/querying-posts-by-custom-field-acf/#array-based-fields
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$strippedvalue = sprintf( '^%1$s$|s:%2$u:"%1$s";', $filteredvalue, strlen( $filteredvalue ) );
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// add our meta query to the original meta queries
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$meta_query[] = array(
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array(
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'key' => $fieldname,
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'value' => $strippedvalue,
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'compare' => 'REGEXP',
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),
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);
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}
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// update the meta query arguments
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$query->set('meta_query', $meta_query);
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}
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//always return
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return;
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}
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