数据库发生错误。

<?php

// select sanitization function
function highstarter_sanitize_select( $input, $setting ) {
	// Ensure input is a slug.
	$input = sanitize_key( $input );
	// Get list of choices from the control associated with the setting.
	$choices = $setting->manager->get_control( $setting->id )->choices;
	// If the input is a valid key, return it; otherwise, return the default.
	return ( array_key_exists( $input, $choices ) ? $input : $setting->default );
}

// checkbox sanitization function
function highstarter_sanitize_checkbox( $checked ) {
	// Boolean check.
	return ( ( isset( $checked ) && true == $checked ) ? true : false );
}

function highstarter_sanitize_number_absint() {

	// Ensure $number is an absolute integer (whole number, zero or greater).
	$number = absint( $number );

	// If the input is an absolute integer, return it; otherwise, return the default
	// return ( $number ? $number : $setting->default );
}