Errors You May Not Have Noticed (Debug Mode)

These errors occur for me when using PHP 5.4

I’m using PHP 5.5.10.

Maybe this might help? – https://www.ads-software.com/support/topic/strict-standards-error-message-1?replies=1

Hi, could You please update the code to remove strict standards errors? It affects lines 1257 to 1291 of post-expirator.php
is
function start_lvl(&$output, $depth, $args) {
should be
function start_lvl(&$output, $depth = 0, $args = array()) {
full, changed code:

class Walker_PostExpirator_Category_Checklist extends Walker {
	var $tree_type = 'category';
	var $db_fields = array ('parent' => 'parent', 'id' => 'term_id'); //TODO: decouple this

	var $disabled = '';

	function setDisabled() {
		$this->disabled = 'disabled="disabled"';
	}

	function start_lvl(&$output, $depth = 0, $args = array()) {
		$indent = str_repeat("\t", $depth);
		$output .= "$indent<ul class='children'>\n";
	}

	function end_lvl(&$output, $depth = 0, $args = array()) {
		$indent = str_repeat("\t", $depth);
		$output .= "$indent</ul>\n";
	}

	function start_el(&$output, $category, $depth = 0, $args = array(), $current_object_id = 0) {
		extract($args);
		if ( empty($taxonomy) )
			$taxonomy = 'category';

		$name = 'expirationdate_category';

		$class = in_array( $category->term_id, $popular_cats ) ? ' class="expirator-category"' : '';
		$output .= "\n<li id='expirator-{$taxonomy}-{$category->term_id}'$class>" . '<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="'.$name.'[]" id="expirator-in-'.$taxonomy.'-' . $category->term_id . '"' . checked( in_array( $category->term_id, $selected_cats ), true, false ) . disabled( empty( $args['disabled'] ), false, false ) . ' '.$this->disabled.'/> ' . esc_html( apply_filters('the_category', $category->name )) . '</label>';
	}

	function end_el(&$output, $category, $depth = 0, $args = array()) {
		$output .= "</li>\n";
	}
}

Also, usually the “Cannot modify header information” error comes from the presence of white space in the code: https://codex.www.ads-software.com/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F

Thanks, @Thorned Rose. I’ll have to try making these changes. Hopefully the plugin’s author will “officially” make these changes as well.