WordPress: Function Reference/update option:修订间差异
(新页面: == Description == Use the function update_option to update a named option/value pair to the options database table. The option_name value i...) |
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== Description == | == Description == | ||
== 描述== | |||
Use the function [[WordPress:Function_Reference/update_option|update_option]] to update a named option/value pair to the options database table. The option_name value is escaped with %%%$wpdb->escape%%% before the INSERT statement. | Use the function [[WordPress:Function_Reference/update_option|update_option]] to update a named option/value pair to the options database table. The option_name value is escaped with %%%$wpdb->escape%%% before the INSERT statement. | ||
使用函数[[WordPress:Function_Reference/update_option|update_option]]将指定的选项/选项值更新到选项数据库表格。在插入声明之前,option_name value is escaped with %%%$wpdb->escape%%%。 | |||
Proper use of this function suggests using [[WordPress:Function_Reference/get_option|get_option]] to retrieve the option and if tested for true, then use [[WordPress:Function_Reference/update_option|update_option]]. If [[WordPress:Function_Reference/get_option|get_option]] returns false, then [[WordPress:Function Reference/add option|add_option]] should be used instead. | Proper use of this function suggests using [[WordPress:Function_Reference/get_option|get_option]] to retrieve the option and if tested for true, then use [[WordPress:Function_Reference/update_option|update_option]]. If [[WordPress:Function_Reference/get_option|get_option]] returns false, then [[WordPress:Function Reference/add option|add_option]] should be used instead. | ||
合理地使用选项,建议使用[[WordPress:Function_Reference/get_option|get_option]]得到选项,如果测试为真的,然后使用[[WordPress:Function_Reference/update_option|update_option]]。如果[[WordPress:Function_Reference/get_option|get_option]]返回错误的,那么应该使用[[WordPress:Function Reference/add option|add_option]]。 | |||
Note that [[WordPress:Function_Reference/update_option|update_option]] cannot be used to change whether an option is to be loaded (or not loaded) by <tt>wp_load_alloptions</tt>. In that case, a [[WordPress:Function_Reference/delete_option|delete_option]] should be followed by use of the [[WordPress:Function_Reference/update_option|update_option]] function. | Note that [[WordPress:Function_Reference/update_option|update_option]] cannot be used to change whether an option is to be loaded (or not loaded) by <tt>wp_load_alloptions</tt>. In that case, a [[WordPress:Function_Reference/delete_option|delete_option]] should be followed by use of the [[WordPress:Function_Reference/update_option|update_option]] function. | ||
注意[[WordPress:Function_Reference/update_option|update_option]]可以用来更改选项是否通过<tt>wp_load_alloptions</tt>载入(或者没有载入)。在这种情况下,[[WordPress:Function_Reference/delete_option|delete_option]]应该在接着使用[[WordPress:Function_Reference/update_option|update_option]]函数。 | |||
== Usage == | == Usage == | ||
== 用法 == | |||
%%%<?php update_option('option_name', 'newvalue'); ?>%%% | |||
%%%<?php update_option('option_name', 'newvalue'); ?>%%% | %%%<?php update_option('option_name', 'newvalue'); ?>%%% | ||
== Example == | == Example == | ||
== 例子 == | |||
Update the option name myhack_extraction_length with the value 255. If the option does not exist then use add_option and set autoload to no. | Update the option name myhack_extraction_length with the value 255. If the option does not exist then use add_option and set autoload to no. | ||
更新参数值255的选项名myhack_extraction_length。如果这个选项不存在,使用add_option并且将自动载入设置为无。 | |||
%%%<?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, $autoload); | |||
} | |||
?>%%% | |||
%%%<?php | %%%<?php | ||
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== Parameters == | == Parameters == | ||
== 参数 == | |||
{{Parameter|option_name|string|Name of the option to update. A list of valid default options to update can be found at the [[WordPress:Option Reference]].}} | {{Parameter|option_name|string|Name of the option to update. A list of valid default options to update can be found at the [[WordPress:Option Reference]].}} | ||
{{Parameter|option_name|string|将要更新的选项的名称。可以在[[WordPress:Option Reference|选项参考]]中找到需要更新的有效的默认选项的列表。}} | |||
{{Parameter|newvalue|string|The NEW value for this option name.}} | {{Parameter|newvalue|string|The NEW value for this option name.}} | ||
{{Parameter|newvalue|string|这个选项名的新的参数值。}} |
2008年7月22日 (二) 13:28的版本
Description
描述
Use the function update_option to update a named option/value pair to the options database table. The option_name value is escaped with %%%$wpdb->escape%%% before the INSERT statement.
使用函数update_option将指定的选项/选项值更新到选项数据库表格。在插入声明之前,option_name value is escaped with %%%$wpdb->escape%%%。
Proper use of this function suggests using get_option to retrieve the option and if tested for true, then use update_option. If get_option returns false, then add_option should be used instead.
合理地使用选项,建议使用get_option得到选项,如果测试为真的,然后使用update_option。如果get_option返回错误的,那么应该使用add_option。
Note that update_option cannot be used to change whether an option is to be loaded (or not loaded) by wp_load_alloptions. In that case, a delete_option should be followed by use of the update_option function.
注意update_option可以用来更改选项是否通过wp_load_alloptions载入(或者没有载入)。在这种情况下,delete_option应该在接着使用update_option函数。
Usage
用法
%%%<?php update_option('option_name', 'newvalue'); ?>%%%
%%%<?php update_option('option_name', 'newvalue'); ?>%%%
Example
例子
Update the option name myhack_extraction_length with the value 255. If the option does not exist then use add_option and set autoload to no.
更新参数值255的选项名myhack_extraction_length。如果这个选项不存在,使用add_option并且将自动载入设置为无。
%%%<?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); }
?>%%%
%%%<?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); }
?>%%%