利用 WordPress 设置 API 添加选择设置页面

本文介绍如何使用 WordPress 设置 API 创建一个简单的单选、列表选择、复选和媒体上传设置页面，并在设置菜单中添加链接菜单。

将代码添加到主题函数模板 functions.php 中。

function zm_demo_settings_radio() {
add_settings_section("section", "标题", null, "demo");
add_settings_field("demo-radio", "单选按钮演示", "zm_demo_radio_display", "demo", "section");
register_setting("section", "zm-demo-radio");
}
function zm_demo_radio_display() {
?>
<input type="radio" name="zm-demo-radio" value="1" <?php checked( 1, get_option( 'zm-demo-radio' ), true); ?>>1
<input type="radio" name="zm-demo-radio" value="2" <?php checked( 2, get_option( 'zm-demo-radio' ), true); ?>>2
<?php
}
add_action( "admin_init", "zm_demo_settings_radio" );
function zm_demo_page() {
?>
<div class="wrap">
<h1>单选设置</h1>
<form method="post" action="options.php">
<?php
settings_fields( "section" );
do_settings_sections( "demo" );
submit_button();
?>
</form>
</div>
<?php
}
function zm_menu_item() {
add_submenu_page( "options-general.php", "单选设置", "单选设置", "manage_options", "demo", "zm_demo_page" );
}
add_action( "admin_menu", "zm_menu_item" );

// 列表选择
function zm_demo_settings_select() {
add_settings_section( "section", "标题", null, "demo" );
add_settings_field( "demo-select", "列表选择", "zm_demo_select_display", "demo", "section" );
register_setting( "section", "demo-select" );
}
function zm_demo_select_display() {
?>
<select name="demo-select">
<option value="qscutter" <?php selected( get_option( 'zm-demo-select' ), "qscutter" ); ?>>QScutter</option>
<option value="qnimate" <?php selected( get_option( 'zm-demo-select' ), "qnimate" ); ?>>QNimate</option>
<option value="qidea" <?php selected( get_option( 'zm-demo-select' ), "qidea" ); ?>>QIdea</option>
<option value="qtrack" <?php selected( get_option( 'zm-demo-select' ), "qtrack" ); ?>>QTrack</option>
</select>
<?php
}
add_action( "admin_init", "zm_demo_settings_select" );
function zm_demo_page() {
?>
<div class="wrap">
<h1>列表选择</h1>
<form method="post" action="options.php">
<?php
settings_fields( "section" );
do_settings_sections( "demo" );
submit_button();
?>
</form>
</div>
<?php
}
function zm_menu_item_select() {
add_submenu_page( "options-general.php", "列表选择", "列表选择", "manage_options", "demo", "zm_demo_page" );
}
add_action( "admin_menu", "zm_menu_item_select" );

// 复选框
function zm_demo_settings_page_checkbox() {
add_settings_section( "section", "标题", null, "demo" );
add_settings_field( "demo-checkbox", "复选框", "zm_demo_checkbox_display", "demo", "section" );
register_setting( "section", "demo-checkbox" );
}
function zm_demo_checkbox_display() {
?>
<input type="checkbox" name="demo-checkbox" value="1" <?php checked( 1, get_option( 'zm-demo-checkbox' ), true ); ?> />
<?php
}
add_action( "admin_init", "zm_demo_settings_page_checkbox" );
function zm_demo_page() {
?>
<div class="wrap">
<h1>复选框</h1>
<form method="post" action="options.php">
<?php
settings_fields( "section" );
do_settings_sections( "demo" );
submit_button();
?>
</form>
</div>
<?php
}
function zm_menu_item_checkbox() {
add_submenu_page( "options-general.php", "复选框", "复选框", "manage_options", "demo", "zm_demo_page" );
}
add_action( "admin_menu", "zm_menu_item_checkbox" );

// 媒体上传
function zm_demo_settings_page_file() {
add_settings_section( "section", "标题", null, "demo" );
add_settings_field( "demo-file", "媒体上传", "zm_demo_file_display", "demo", "section" );
register_setting( "section", "demo-file", "handle_file_upload" );
}
function handle_file_upload( $option ) {
if( !empty( $_FILES["demo-file"]["tmp_name"] ) ) {
$urls = wp_handle_upload( $_FILES["demo-file"], array( 'test_form' => FALSE ) );
$temp = $urls["url"];
return $temp;
}
return $option;
}
function zm_demo_file_display() {
?>
<input type="file" name="demo-file" />
<?php echo get_option( 'demo-file' ); ?>
<?php
}
add_action( "admin_init", "zm_demo_settings_page_file" );
function zm_demo_page_file() {
?>
<div class="wrap">
<h1>媒体上传</h1>
<form method="post" action="options.php">
<?php
settings_fields("section");
do_settings_sections("demo");
submit_button();
?>
</form>
</div>
<?php
}
function zm_menu_item_file() {
add_submenu_page( "options-general.php", "媒体上传", "媒体上传", "manage_options", "demo", "zm_demo_page_file" );
}
add_action( "admin_menu", "zm_menu_item_file" );