Fixes incompatibilities with older versions of PHP

FILE: tainacan/src/importer/class-tainacan-importer.php
-----------------------------------------------------------------------------------
FOUND 3 ERRORS AFFECTING 2 LINES
-----------------------------------------------------------------------------------
 603 | ERROR | 'int' type declaration is not present in PHP version 5.6 or earlier
 616 | ERROR | 'int' type declaration is not present in PHP version 5.6 or earlier
 616 | ERROR | 'int' type declaration is not present in PHP version 5.6 or earlier
-----------------------------------------------------------------------------------

FILE: tainacan/src/classes/class-tainacan-elastic-press.php
----------------------------------------------------------------------------------------
FOUND 2 ERRORS AFFECTING 2 LINES
----------------------------------------------------------------------------------------
 16 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and
    |       | prohibited since PHP 5.4
 24 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and
    |       | prohibited since PHP 5.4
----------------------------------------------------------------------------------------

FILE: tainacan/src/classes/class-tainacan-bulk-edit.php
----------------------------------------------------------------------------------------
FOUND 2 ERRORS AFFECTING 2 LINES
----------------------------------------------------------------------------------------
 78 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and
    |       | prohibited since PHP 5.4
 85 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and
    |       | prohibited since PHP 5.4
----------------------------------------------------------------------------------------

src/classes/class-tainacan-bulk-edit.php

@@ -75,14 +75,14 @@ class Bulk_Edit  {
 			add_filter('posts_pre_query', '__return_empty_array');
 			
 			// this adds the meta key and meta value to the SELECT query so it can be used directly in the INSERT below
-			add_filter('posts_fields_request', [&$this, 'add_fields_to_query'], 10, 2);
+			add_filter('posts_fields_request', [$this, 'add_fields_to_query'], 10, 2);
 			
 			$itemsRepo = Repositories\Items::get_instance();
 			$params['query']['fields'] = 'ids';
 			$items_query = $itemsRepo->fetch($params['query'], $params['collection_id']);
 			
 			remove_filter('posts_pre_query', '__return_empty_array');
-			remove_filter('posts_fields_request', [&$this, 'add_fields_to_query']);
+			remove_filter('posts_fields_request', [$this, 'add_fields_to_query']);
 			
 			$wpdb->query( "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) {$items_query->request}" );
 			

src/classes/class-tainacan-elastic-press.php

@@ -13,7 +13,7 @@ namespace Tainacan;
 class Elastic_Press {
 
 	function __construct($ajax_query=false) {
-		add_action('init', [&$this, 'init']);
+		add_action('init', [$this, 'init']);
 		
 	}
 	
@@ -21,7 +21,7 @@ class Elastic_Press {
 		if (!class_exists('EP_API')) {
 			return; // ElasticPress not active
 		}
-		add_filter('tainacan_fetch_args', [&$this, 'filter_args'], 10, 2);
+		add_filter('tainacan_fetch_args', [$this, 'filter_args'], 10, 2);
 	}
 	
 	function filter_args($args, $type) {

src/importer/class-tainacan-importer.php

@@ -600,7 +600,7 @@ abstract class Importer {
 	 * the current progress of the process.
 	 * 
 	 */
-	protected function set_current_step_total(int $value) {
+	protected function set_current_step_total($value) {
 		$this->set_step_total($this->get_current_step(), $value);
 	}
 
@@ -613,7 +613,7 @@ abstract class Importer {
 	 * the current progress of the process.
 	 * 
 	 */
-	protected function set_step_total(int $step, int $value) {
+	protected function set_step_total($step, $value) {
 		$steps = $this->get_steps();
 		if (isset($steps[$step]) && is_array($steps[$step])) {
 			$steps[$step]['total'] = $value;

verify_compat.sh

@@ -5,4 +5,6 @@ echo 'W is Warning'
 echo 'E is Error'
 
 ./src/vendor/bin/phpcs -p . --standard=PHPCompatibility --extensions=php --ignore=*/node_modules/*,*/src/vendor/* --report-file=./report.txt --runtime-set testVersion 5.6
+echo 'Done'
+echo 'Results are in ./report.txt'