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Edit File: V_3_3_7.php

<?php

namespace WeDevs\Dokan\Upgrade\Upgrades;

use WeDevs\Dokan\Abstracts\DokanUpgrader;

class V_3_3_7 extends DokanUpgrader {

/**
     * Updates withdraw database table column. Before on dokan_withdraw
     * table details column it was set longtext NOT NUll, now we are setting it null by default.
     *
     * @since 3.3.7
     *
     * @return void
     */
    public static function update_withdraw_table_column() {
        global $wpdb;

// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
        $existing_columns = $wpdb->get_results( "DESC `{$wpdb->prefix}dokan_withdraw`" );

foreach ( (array) $existing_columns as $existing_column ) {
            if ( 'details' === $existing_column->Field && 'NO' === $existing_column->Null ) { // phpcs:ignore
                $table = $wpdb->prefix . 'dokan_withdraw';
                $column = $existing_column->Field; // phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase

// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.DirectDatabaseQuery.SchemaChange, WordPress.DB.PreparedSQLPlaceholders.UnsupportedIdentifierPlaceholder
                $wpdb->query( $wpdb->prepare( 'ALTER TABLE %i MODIFY COLUMN %i longtext NULL', $table, $column ) );
            }
        }
    }

/**
     * Flush rewrite rules so that new menu is visible without permalink reset
     *
     * @since 3..3.7
     *
     * @return void
     */
    public static function flush_rewrite_rules() {
        do_action( 'woocommerce_flush_rewrite_rules' );
    }
}

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