wpdb::process_field_lengths( array $data, string $table ): array|false

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

Parameters

$dataarrayrequired

Array of values, formats, and charsets keyed by their field names, as it comes from the wpdb::process_field_charsets() method.

...$0 array
Value, format, and charset for this field.
- value mixed
  The value to be formatted.
- format string
  The format to be mapped to the value.
- charset string|false
  The charset to be used for the value.

$tablestringrequired

Table name.

Return

array|false The same array of data with additional ‘length’ keys, or false if information for the table cannot be found.

...$0 array
Value, format, charset, and length for this field.
- value mixed
  The value to be formatted.
- format string
  The format to be mapped to the value.
- charset string|false
  The charset to be used for the value.
- length array|false
  Information about the maximum length of the value.
  False if the column has no length.
  - type string
    One of 'byte' or 'char'.
  - length int
    The column length.
    }

Source

protected function process_field_lengths( $data, $table ) {
	foreach ( $data as $field => $value ) {
		if ( '%d' === $value['format'] || '%f' === $value['format'] ) {
			/*
			 * We can skip this field if we know it isn't a string.
			 * This checks %d/%f versus ! %s because its sprintf() could take more.
			 */
			$value['length'] = false;
		} else {
			$value['length'] = $this->get_col_length( $table, $field );
			if ( is_wp_error( $value['length'] ) ) {
				return false;
			}
		}

		$data[ $field ] = $value;
	}

	return $data;
}

View all references View on Trac View on GitHub

Uses	Description
wpdb::get_col_length()`wp-includes/class-wpdb.php`	Retrieves the maximum string length allowed in a given column.
is_wp_error()`wp-includes/load.php`	Checks whether the given variable is a WordPress Error.

Used by	Description
wpdb::process_fields()`wp-includes/class-wpdb.php`	Processes arrays of field/value pairs and field formats.

Changelog

Version	Description
4.2.1	Introduced.

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