Function Reference/checked

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Description

Compares two given values (for example, a saved option vs. one chosen in a form) and, if the values are the same, adds the checked attribute to the current radio button or checkbox.

This is essentially the same as comparing values with if(), but results in more concise code.

Format

<?php function checked( $checked, $current=true, $echo=true ); ?>

Parameters

tt$checked/tt
(mixed) (required) One of the values to compare.
Default: Nonenoinclude

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Notes

This template is for standardizing how parameters look in the Function Reference and in Template Tags. Here is an example of this template being called: prenowiki检查到模板循环:模板:Parameter/nowiki/pre 检查到模板循环:模板:Parameter

The usage of this template is below: prenowiki检查到模板循环:模板:Parameter/nowiki/pre Let's take a closer look at the parameters..

name
The name of the parameter.
datatype
The datatype that should be given for this parameter when called.
  • string
  • integer
  • boolean
  • mixed
description
A short description of the parameter.
importance
Set this parameter to optional if the parameter is optional. Otherwise, do not declare this parameter—it defaults to required.
  • required
  • optional
default
If this parameter is optional, ttdefault/tt is the value that will be used if the parameter is not declared.

wordpress.org.cn /div /noinclude

tt$current/tt
(mixed) (optional) The other value to compare if not just true.
Default: truenoinclude

div class=template-description style=padding: 0 1.5em; border: 1px solid #eeeeee; background-color: #f9f9f9

Notes

This template is for standardizing how parameters look in the Function Reference and in Template Tags. Here is an example of this template being called: prenowiki检查到模板循环:模板:Parameter/nowiki/pre 检查到模板循环:模板:Parameter

The usage of this template is below: prenowiki检查到模板循环:模板:Parameter/nowiki/pre Let's take a closer look at the parameters..

name
The name of the parameter.
datatype
The datatype that should be given for this parameter when called.
  • string
  • integer
  • boolean
  • mixed
description
A short description of the parameter.
importance
Set this parameter to optional if the parameter is optional. Otherwise, do not declare this parameter—it defaults to required.
  • required
  • optional
default
If this parameter is optional, ttdefault/tt is the value that will be used if the parameter is not declared.

wordpress.org.cn /div /noinclude

tt$echo/tt
(boolean) (optional) Whether to echo or just return the string. This function will always return the result regardless.
Default: truenoinclude

div class=template-description style=padding: 0 1.5em; border: 1px solid #eeeeee; background-color: #f9f9f9

Notes

This template is for standardizing how parameters look in the Function Reference and in Template Tags. Here is an example of this template being called: prenowiki检查到模板循环:模板:Parameter/nowiki/pre 检查到模板循环:模板:Parameter

The usage of this template is below: prenowiki检查到模板循环:模板:Parameter/nowiki/pre Let's take a closer look at the parameters..

name
The name of the parameter.
datatype
The datatype that should be given for this parameter when called.
  • string
  • integer
  • boolean
  • mixed
description
A short description of the parameter.
importance
Set this parameter to optional if the parameter is optional. Otherwise, do not declare this parameter—it defaults to required.
  • required
  • optional
default
If this parameter is optional, ttdefault/tt is the value that will be used if the parameter is not declared.

wordpress.org.cn /div /noinclude

Returns

tt/tt
tt style=color:gray@return/tt (string) tt style=color:blue/tt: HTML attribute (checked='checked') or empty string.noinclude

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Description

This template is for standardizing how return values look in the Function Reference and in Template Tags.

Parameters

(1|param|param)
Return param or value (also can be: null, void...).
(2|datatype|datatype)
Datatype of return value.
(3|description|description)
Description of return value.

Usage

prenowiki检查到模板循环:模板:Return/nowiki/pre

Example

prenowiki检查到模板循环:模板:Return/nowiki/pre

Output

检查到模板循环:模板:Return /div /noinclude

Usage

%%%<?php checked( $checked, $current, $echo); ?>%%%

Example

<?php
$options = get_option( 'slug_option' ); // get our options array from the db
$checked = $variable_we_are_checking = $options['self-destruct']; // get the value of the option we want
$current = $check_when_variable_equals_this = true; // this is true by default, just here to make things clearer
$echo = $should_it_echo = true; // also true by default
?>
<input name="slug-option[self-destruct]" value="1" <?php checked( $checked, $current, $echo ); ?>/>

Testing the value with if():

<input type='checkbox' name='options[postlink]' value='1' <?php if ( 1 == $options['postlink'] ) echo 'checked="checked"'; ?> />

Using checked() instead:

<input type="checkbox" name="options[postlink]" value="1" <?php checked( $options['postlink'], 1 ); ?> />

Changelog

Since: 1.0

Source File

checked() is located in onlyincludecodewp-includes/general-template.php/code/onlyinclude

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Template Description

Link to the source code on http://core.trac.wordpress.org/browser/.

Parameters

  1. filename
  2. (option) path to codetag/code (version) or codetrunk/code. This option is only used for a new function.br /Default: codetrunk/code -- trunk is the latest bleeding edge development version of WordPress.

Usage

Link to the stable version: pre检查到模板循环:模板:Trac/pre

Link to trunk: pre检查到模板循环:模板:Trac/pre

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wordpress.org.cn.

Related

selected(), disabled()