File: wp-includes/class-wpdb.php

Quotes an identifier for a MySQL database, e.g. table/field names.

Escapes an identifier value without adding the surrounding quotes.

Returns the version of the MySQL server.

Logs query data.

Adds a placeholder escape string, to escape anything that resembles a printf() placeholder.

Removes the placeholder escape strings from a query.

Parses the DB_HOST setting to interpret it for mysqli_real_connect().

Generates and returns a placeholder escape string for use in queries returned by ::prepare().

Determines the best charset and collation to use given a charset and collation.

Closes the current database connection.

Retrieves the maximum string length allowed in a given column.

For string fields, records the maximum string length that field can safely save.

Finds the first table name referenced in a query.

Strips any invalid characters from the string for a given table and column.

Retrieves the character set for the given table.

Retrieves the character set for the given column.

Checks if a string is ASCII.

Checks if the query is accessing a collation considered safe on the current version of MySQL.

Strips any invalid characters based on value/charset pairs.

Strips any invalid characters from the query.

Prepares arrays of value/format pairs as passed to wpdb CRUD methods.

Adds field charsets to field/value/format arrays generated by wpdb::process_field_formats().

Processes arrays of field/value pairs and field formats.

First half of escaping for `LIKE` special characters `%` and `_` before preparing for SQL.

Stops the debugging timer.

Wraps errors in a nice header and footer and dies.

Determines whether MySQL database is at least the required minimum version.