Merge pull request #796 from Codeinwp/bugfix/795

Fix PHP warning

Author: selul

classes/Visualizer/Render/Sidebar/Google.php

@@ -208,15 +208,15 @@ protected function _renderGeneralSettings() {
 				self::_renderSelectItem(
 					esc_html__( 'Position', 'visualizer' ),
 					'legend[position]',
-					$this->legend['position'],
+					isset( $this->legend['position'] ) ? $this->legend['position'] : '',
 					$this->_legendPositions,
 					esc_html__( 'Determines where to place the legend, compared to the chart area.', 'visualizer' )
 				);
 
 				self::_renderSelectItem(
 					esc_html__( 'Alignment', 'visualizer' ),
 					'legend[alignment]',
-					$this->legend['alignment'],
+					isset( $this->legend['alignment'] ) ? $this->legend['alignment'] : '',
 					$this->_alignments,
 					esc_html__( 'Determines the alignment of the legend.', 'visualizer' )
 				);
@@ -393,10 +393,12 @@ protected function _renderViewSettings() {
 					echo '<table class="viz-section-table" cellspacing="0" cellpadding="0" border="0">';
 						echo '<tr>';
 							echo '<td class="viz-section-table-column">';
-								echo '<input type="text" name="chartArea[left]" class="control-text" value="', $this->chartArea['left'] || $this->chartArea['left'] === '0' ? esc_attr( $this->chartArea['left'] ) : '', '" placeholder="20%">';
+								$chartarea_left = isset( $this->chartArea['left'] ) ? $this->chartArea['left'] : '';
+								echo '<input type="text" name="chartArea[left]" class="control-text" value="', $chartarea_left || '0' === $chartarea_left ? esc_attr( $chartarea_left ) : '', '" placeholder="20%">';
 							echo '</td>';
 							echo '<td class="viz-section-table-column">';
-								echo '<input type="text" name="chartArea[top]" class="control-text" value="', $this->chartArea['top'] || $this->chartArea['top'] === '0' ? esc_attr( $this->chartArea['top'] ) : '', '" placeholder="20%">';
+								$chartarea_top = isset( $this->chartArea['top'] ) ? $this->chartArea['top'] : '';
+								echo '<input type="text" name="chartArea[top]" class="control-text" value="', $chartarea_top || '0' === $chartarea_top ? esc_attr( $chartarea_top ) : '', '" placeholder="20%">';
 							echo '</td>';
 						echo '</tr>';
 					echo '</table>';

classes/Visualizer/Source.php

@@ -335,7 +335,7 @@ public static final function get_date_formats_if_exists( $series, $data ) {
 	 *
 	 * @return string|null
 	 */
-	private static final function determine_date_format( $value, $type ) {
+	private static function determine_date_format( $value, $type ) {
 		if ( version_compare( phpversion(), '5.3.0', '<' ) ) {
 			do_action( 'themeisle_log_event', Visualizer_Plugin::NAME, sprintf( 'PHP version %s not supported', phpversion() ), 'error', __FILE__, __LINE__ );
 			return null;