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database - Detecting errors generated by $wpdb->get ...

    https://wordpress.stackexchange.com/questions/141627/detecting-errors-generated-by-wpdb-get-results
    There is a class variable that stores the last error string - $wpdb->last_error. By the looks of the way $wpdb is coded, if the query succeeds, $wpdb->last_error will be an empty string, if it fails, it will be the error string returned by MySQL. So something like this would do the trick.

Simple $wpdb error handling – The Code Cave

    https://thecodecave.com/simple-wpdb-error-handling/
    Apr 25, 2011 · It will grow over time: A very simple non-failing method for in a function: if ($wpdb->query ($query) === FALSE) { return FALSE; } else { return $wpdb->get_results ($query); } A more complex method for in a function. It uses WordPress’s built in WP_Error class: if ( false === $wpdb->query ($sql)) { if ( $wp_error ) { return new WP_Error ( 'db_query_error', __ ( …

wpdb Class WordPress Developer Resources

    https://developer.wordpress.org/reference/classes/wpdb/
    " AS x_$column"; } $this->check_current_query = false; $row = $this->get_row( 'SELECT ' . implode( ', ', $sql ), ARRAY_A ); if ( ! $row ) { return new WP_Error( 'wpdb_strip_invalid_text_failure' ); } foreach ( array_keys( $data ) as $column ) { if ( isset( $row[ "x_$column" ] ) ) { $data[ $column ]['value'] = $row[ "x_$column" ]; } } } return $data; } /** …

php - $wpdb->insert not working. No Error Msg - Stack Overflow

    https://stackoverflow.com/questions/20605937/wpdb-insert-not-working-no-error-msg
    echo $wpdb->last_error; or. echo $wpdb->show_errors(); If no error visible then you must print your last query using with last query function. echo $wpdb->last_query(); Copy and paste your last query in your Phpmyadmin > Your Database -> Table -> SQL tab, click on Go button, you will definitely get proper solutions(errors) in it. Thanks, Rocky Mehta.

wpdb last_query, last_result, last_error - ITAdminGuide.com

    https://itadminguide.com/wpdb-last_query-last_result-last_error/
    Jan 28, 2017 · Next story showing errors with wpdb update or insert query; Previous story Difference between wpdb get_row(), get_results(), get_var() and get_query()

Understanding and using $wpdb object in WordPress - Designmodo

    https://designmodo.com/wpdb-object-wordpress/
    The class wpdb also provides some other useful functions which are as follows. flush – This function is used to flush the result of previous query. show_errors – This function is used to enable showing database errors. hide_errors – This …

What $wpdb Is, and Why I Try Not To Use It • WPShout

    https://wpshout.com/introduction-to-wpdb-why-not/
    Dec 01, 2015 · More than half of what matters about a WordPress site is stored in its (typically MySQL) database. Why? Because WordPress stores all its “content” in the database.

Errors in wp-db.php WordPress.org

    https://wordpress.org/support/topic/errors-in-wp-db-php/
    I didn’t check, but the default value for wait_timeout might be around 28800 seconds (8 hours). Server dropped an incorrect or too large packet. If mysqld gets a packet that is too large or incorrect, it assumes that something has gone wrong with the client and closes the connection.

Talk:Class Reference/wpdb « WordPress Codex

    https://codex.wordpress.org/Talk:Class_Reference/wpdb
    It is true that WordPress currently does "magic-quotes"-like escaping of the user input. However, that may change in the future (we hope). Also, sometimes the slashes may be stripped out for some reason, and may need to be added back.
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