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;
      }
      

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      Changelog

      Version	Description
      4.2.1	Introduced.

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