Testing name space hooks with Admin Pag Framework.

admin-page-framework-test-namespace-hooks.php

<?php
/* 
 * Plugin Name:     Admin Page Framework Test - Namespace Hooks
 * Description:     
 * Author:          Michael Uno
 * Author URI:      http://michaeluno.jp
 * Version:         1.0.0
 */ 

function loadAdminPageFrameworkTestNamespaceHooks() {
    
    // If using PHP v5.3 or below, return.
    if ( version_compare( PHP_VERSION, '5.3', '<' ) ) {
        return;
    }    
      
    include( dirname( __FILE__ ) . '/APF_Test_NamespaceHooks.php' );
    
}
// admin_page_framework_loader_ + _action_after_loading_plugin
add_action( 'admin_page_framework_loader_action_after_loading_plugin', 'loadAdminPageFrameworkTestNamespaceHooks', 100 );

APF_Test_NamespaceHooks.php

<?php

namespace Foo\Bar;

class APF_Test_NamespaceHooks extends \AdminPageFramework {

    /**
     * Sest up pages.
     */
    public function setUp() {

        $this->setRootMenuPage( 'Settings' );    // where to belong
        $this->addSubMenuItem(
            array(
                'title'         => __( 'APF Namespace Test', 'admin-page-framework-examples' ),    // page and menu title
                'page_slug'     => 'apf_test_namespace'    // page slug
            )
        );
            
        $this->addSettingSections(    
            array(
                'section_id'    => 'custom_repeatable_values',    
                'page_slug'     => 'apf_test_namespace',    
            )
        );
        
        $this->addSettingFields(
            'custom_repeatable_values',    // the target section ID
            array(    
                'field_id'      => 'my_text_field',
                'title'         => __( 'Text', 'admin-page-framework-examples' ),
                'type'          => 'text',
            ),
            array(
                'field_id'      => '__submit',
                'type'          => 'submit',
                'save'          => false,   // do not save the value
            )
        );
        
    }            
                       
 
  
}

new APF_Test_NamespaceHooks( 
    'apf_test_namespace_hooks'  // the option key name stored in the options table.
);    


function insertCustomText() {
    echo "<h3>Current Action/Filter Hook</h3>";
    echo "<p>" 
        . sprintf(
            'This is inserted with the <code>%1$s</code> hook.',
            current_filter()
        )
        . "</p>";
}
add_action( 'do_Foo\Bar\APF_Test_NamespaceHooks', 'Foo\Bar\insertCustomText' );