: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
* Render select field for matching-technique of string-based Display Conditions
* @package Advanced_Ads_Admin
* @author Thomas Maier <support@wpadvancedads.com>
* @link https://wpadvancedads.com
* @copyright since 2013 Thomas Maier, Advanced Ads GmbH
* @var string $name option name.
* @var string $operator value of the $operator option.
?><select name="<?php echo esc_attr( $name ); ?>[operator]">
<option value="contain" <?php selected( 'contain', $operator ); ?>><?php esc_attr_e( 'contains', 'advanced-ads' ); ?></option>
<option value="start" <?php selected( 'start', $operator ); ?>><?php esc_attr_e( 'starts with', 'advanced-ads' ); ?></option>
<option value="end" <?php selected( 'end', $operator ); ?>><?php esc_attr_e( 'ends with', 'advanced-ads' ); ?></option>
<option value="match" <?php selected( 'match', $operator ); ?>><?php esc_attr_e( 'matches', 'advanced-ads' ); ?></option>
<option value="regex" <?php selected( 'regex', $operator ); ?>><?php esc_attr_e( 'matches regex', 'advanced-ads' ); ?></option>
<option value="contain_not" <?php selected( 'contain_not', $operator ); ?>><?php esc_attr_e( 'does not contain', 'advanced-ads' ); ?></option>
<option value="start_not" <?php selected( 'start_not', $operator ); ?>><?php esc_attr_e( 'does not start with', 'advanced-ads' ); ?></option>
<option value="end_not" <?php selected( 'end_not', $operator ); ?>><?php esc_attr_e( 'does not end with', 'advanced-ads' ); ?></option>
<option value="match_not" <?php selected( 'match_not', $operator ); ?>><?php esc_attr_e( 'does not match', 'advanced-ads' ); ?></option>
<option value="regex_not" <?php selected( 'regex_not', $operator ); ?>><?php esc_attr_e( 'does not match regex', 'advanced-ads' ); ?></option>