Simple understanding of the use of update_option () functions in WordPress development, wordpressgetoption_php Tutorial

Simply understand the use of the Update_option () function in WordPress development, Wordpressgetoption

function Introduction

Update_option () is used to update the option values that exist in the data table. This function can replace add_option, but is less flexible than add_option. Update_option checks and determines whether the option already exists. If it does not exist, add the option with Add_option (' option_name ', ' option_value '). Unless the user needs to specify an option parameter for Add_option, Update_option () is a dual-use function that can add and update options at the same time.
Note: update_option () cannot be updated when wp_load_alloptions will load (or not load) an option. In this case, you should use delete_option after you use the Update_option () function.

function usage

<?php update_option ($option _name, $newvalue);?>

function parameters

$option _name

(string) (required) the option name that needs to be updated. The valid default options that can be upgraded are listed in option reference.

Default value: None

$newvalue

(mixed) (required) The new value of the current option name. The new value can be a string, an array, an object, or a serialized value.

Default value: None

function instance

Update the value of the option name myhack_extraction_length to 255. If this option is not present, use the Add_option function to set the value of AutoLoad to No.

<?php$option_name = ' myhack_extraction_length '; $newvalue = ' 255 '; if (Get_option ($option _name)) {  update_option ($option _name, $newvalue);} else {  $deprecated = ';  $autoload = ' no ';  Add_option ($option _name, $newvalue, $deprecated, $autoload); }?>

source file

Update_option () is located in wp-includes/option.php.

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