Answers to Questions and Exercises: Object-Oriented Programming Concepts

( ! ) Deprecated: Function WP_Dependencies->add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers. in /var/www/html/wp-includes/functions.php on line 6131
Call Stack
#	Time	Memory	Function	Location
1	0.0000	484048	{main}( )	.../index.php:0
2	0.0000	484400	require( '/var/www/html/wp-blog-header.php )	.../index.php:17
3	0.1049	4085072	require_once( '/var/www/html/wp-includes/template-loader.php )	.../wp-blog-header.php:19
4	0.1053	4114064	include( '/var/www/html/wp-content/themes/twentyfifteen/single.php )	.../template-loader.php:125
5	0.1053	4114064	get_header( $name = ???, $args = ??? )	.../single.php:10
6	0.1053	4114280	locate_template( $template_names = [0 => 'header.php'], $load = TRUE, $load_once = TRUE, $args = [] )	.../general-template.php:48
7	0.1053	4114376	load_template( $_template_file = '/var/www/html/wp-content/themes/twentyfifteen/header.php', $load_once = TRUE, $args = [] )	.../template.php:749
8	0.1053	4114920	require_once( '/var/www/html/wp-content/themes/twentyfifteen/header.php )	.../template.php:814
9	0.1055	4122328	wp_head( )	.../header.php:18
10	0.1055	4122328	do_action( $hook_name = 'wp_head' )	.../general-template.php:3197
11	0.1055	4122544	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
12	0.1055	4122544	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
13	0.1514	4125960	wp_enqueue_scripts( '' )	.../class-wp-hook.php:341
14	0.1514	4125960	do_action( $hook_name = 'wp_enqueue_scripts' )	.../script-loader.php:2311
15	0.1514	4126176	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
16	0.1514	4126176	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
17	0.1516	4128064	twentyfifteen_scripts( '' )	.../class-wp-hook.php:341
18	0.1517	4129584	wp_style_add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )	.../functions.php:440
19	0.1517	4129584	WP_Styles->add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )	.../functions.wp-styles.php:245
20	0.1517	4129584	WP_Dependencies->add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )	.../class-wp-styles.php:385
21	0.1517	4129584	_deprecated_argument( $function_name = 'WP_Dependencies->add_data()', $version = '6.9.0', $message = 'IE conditional comments are ignored by all supported browsers.' )	.../class-wp-dependencies.php:317
22	0.1517	4129904	wp_trigger_error( $function_name = '', $message = 'Function WP_Dependencies->add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers.', $error_level = 16384 )	.../functions.php:5925
23	0.1518	4136288	trigger_error( $message = 'Function WP_Dependencies->add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers.', $error_level = 16384 )	.../functions.php:6131

( ! ) Deprecated: Function WP_Dependencies->add_data() was called with an argument that is deprecated since version 6.9.0! IE conditional comments are ignored by all supported browsers. in /var/www/html/wp-includes/functions.php on line 6131

Call Stack

Time

Memory

Function

Location

0.0000

484048

{main}( )

.../index.php:0

0.0000

484400

require( '/var/www/html/wp-blog-header.php )

.../index.php:17

0.1049

4085072

require_once( '/var/www/html/wp-includes/template-loader.php )

.../wp-blog-header.php:19

0.1053

4114064

include( '/var/www/html/wp-content/themes/twentyfifteen/single.php )

.../template-loader.php:125

0.1053

4114064

get_header( $name = ???, $args = ??? )

.../single.php:10

0.1053

4114280

locate_template( $template_names = [0 => 'header.php'], $load = TRUE, $load_once = TRUE, $args = [] )

.../general-template.php:48

0.1053

4114376

load_template( $_template_file = '/var/www/html/wp-content/themes/twentyfifteen/header.php', $load_once = TRUE, $args = [] )

.../template.php:749

0.1053

4114920

require_once( '/var/www/html/wp-content/themes/twentyfifteen/header.php )

.../template.php:814

0.1055

4122328

wp_head( )

.../header.php:18

0.1055

4122328

do_action( $hook_name = 'wp_head' )

.../general-template.php:3197

0.1055

4122544

WP_Hook->do_action( $args = [0 => ''] )

.../plugin.php:522

0.1055

4122544

WP_Hook->apply_filters( $value = '', $args = [0 => ''] )

.../class-wp-hook.php:365

0.1514

4125960

wp_enqueue_scripts( '' )

.../class-wp-hook.php:341

0.1514

4125960

do_action( $hook_name = 'wp_enqueue_scripts' )

.../script-loader.php:2311

0.1514

4126176

WP_Hook->do_action( $args = [0 => ''] )

.../plugin.php:522

0.1514

4126176

WP_Hook->apply_filters( $value = '', $args = [0 => ''] )

.../class-wp-hook.php:365

0.1516

4128064

twentyfifteen_scripts( '' )

.../class-wp-hook.php:341

0.1517

4129584

wp_style_add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )

.../functions.php:440

0.1517

4129584

WP_Styles->add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )

.../functions.wp-styles.php:245

0.1517

4129584

WP_Dependencies->add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )

.../class-wp-styles.php:385

0.1517

4129584

_deprecated_argument( $function_name = 'WP_Dependencies->add_data()', $version = '6.9.0', $message = 'IE conditional comments are ignored by all supported browsers.' )

.../class-wp-dependencies.php:317

0.1517

4129904

wp_trigger_error( $function_name = '', $message = 'Function WP_Dependencies->add_data() was called with an argument that is deprecated since version 6.9.0! IE conditional comments are ignored by all supported browsers.', $error_level = 16384 )

.../functions.php:5925

0.1518

4136288

trigger_error( $message = 'Function WP_Dependencies->add_data() was called with an argument that is deprecated since version 6.9.0! IE conditional comments are ignored by all supported browsers.', $error_level = 16384 )

.../functions.php:6131

( ! ) Deprecated: Function WP_Dependencies->add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers. in /var/www/html/wp-includes/functions.php on line 6131
Call Stack
#	Time	Memory	Function	Location
1	0.0000	484048	{main}( )	.../index.php:0
2	0.0000	484400	require( '/var/www/html/wp-blog-header.php )	.../index.php:17
3	0.1049	4085072	require_once( '/var/www/html/wp-includes/template-loader.php )	.../wp-blog-header.php:19
4	0.1053	4114064	include( '/var/www/html/wp-content/themes/twentyfifteen/single.php )	.../template-loader.php:125
5	0.1053	4114064	get_header( $name = ???, $args = ??? )	.../single.php:10
6	0.1053	4114280	locate_template( $template_names = [0 => 'header.php'], $load = TRUE, $load_once = TRUE, $args = [] )	.../general-template.php:48
7	0.1053	4114376	load_template( $_template_file = '/var/www/html/wp-content/themes/twentyfifteen/header.php', $load_once = TRUE, $args = [] )	.../template.php:749
8	0.1053	4114920	require_once( '/var/www/html/wp-content/themes/twentyfifteen/header.php )	.../template.php:814
9	0.1055	4122328	wp_head( )	.../header.php:18
10	0.1055	4122328	do_action( $hook_name = 'wp_head' )	.../general-template.php:3197
11	0.1055	4122544	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
12	0.1055	4122544	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
13	0.1514	4125960	wp_enqueue_scripts( '' )	.../class-wp-hook.php:341
14	0.1514	4125960	do_action( $hook_name = 'wp_enqueue_scripts' )	.../script-loader.php:2311
15	0.1514	4126176	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
16	0.1514	4126176	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
17	0.1516	4128064	twentyfifteen_scripts( '' )	.../class-wp-hook.php:341
18	0.1808	4137392	wp_style_add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )	.../functions.php:444
19	0.1808	4137392	WP_Styles->add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )	.../functions.wp-styles.php:245
20	0.1808	4137392	WP_Dependencies->add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )	.../class-wp-styles.php:385
21	0.1808	4137392	_deprecated_argument( $function_name = 'WP_Dependencies->add_data()', $version = '6.9.0', $message = 'IE conditional comments are ignored by all supported browsers.' )	.../class-wp-dependencies.php:317
22	0.1808	4137712	wp_trigger_error( $function_name = '', $message = 'Function WP_Dependencies->add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers.', $error_level = 16384 )	.../functions.php:5925
23	0.1809	4137936	trigger_error( $message = 'Function WP_Dependencies->add_data() was called with an argument that is <strong>deprecated</strong> since version 6.9.0! IE conditional comments are ignored by all supported browsers.', $error_level = 16384 )	.../functions.php:6131

Call Stack

Time

Memory

Function

Location

0.0000

484048

{main}( )

.../index.php:0

0.0000

484400

require( '/var/www/html/wp-blog-header.php )

.../index.php:17

0.1049

4085072

require_once( '/var/www/html/wp-includes/template-loader.php )

.../wp-blog-header.php:19

0.1053

4114064

include( '/var/www/html/wp-content/themes/twentyfifteen/single.php )

.../template-loader.php:125

0.1053

4114064

get_header( $name = ???, $args = ??? )

.../single.php:10

0.1053

4114280

locate_template( $template_names = [0 => 'header.php'], $load = TRUE, $load_once = TRUE, $args = [] )

.../general-template.php:48

0.1053

4114376

load_template( $_template_file = '/var/www/html/wp-content/themes/twentyfifteen/header.php', $load_once = TRUE, $args = [] )

.../template.php:749

0.1053

4114920

require_once( '/var/www/html/wp-content/themes/twentyfifteen/header.php )

.../template.php:814

0.1055

4122328

wp_head( )

.../header.php:18

0.1055

4122328

do_action( $hook_name = 'wp_head' )

.../general-template.php:3197

0.1055

4122544

WP_Hook->do_action( $args = [0 => ''] )

.../plugin.php:522

0.1055

4122544

WP_Hook->apply_filters( $value = '', $args = [0 => ''] )

.../class-wp-hook.php:365

0.1514

4125960

wp_enqueue_scripts( '' )

.../class-wp-hook.php:341

0.1514

4125960

do_action( $hook_name = 'wp_enqueue_scripts' )

.../script-loader.php:2311

0.1514

4126176

WP_Hook->do_action( $args = [0 => ''] )

.../plugin.php:522

0.1514

4126176

WP_Hook->apply_filters( $value = '', $args = [0 => ''] )

.../class-wp-hook.php:365

0.1516

4128064

twentyfifteen_scripts( '' )

.../class-wp-hook.php:341

0.1808

4137392

wp_style_add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )

.../functions.php:444

0.1808

4137392

WP_Styles->add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )

.../functions.wp-styles.php:245

0.1808

4137392

WP_Dependencies->add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )

.../class-wp-styles.php:385

0.1808

4137392

_deprecated_argument( $function_name = 'WP_Dependencies->add_data()', $version = '6.9.0', $message = 'IE conditional comments are ignored by all supported browsers.' )

.../class-wp-dependencies.php:317

0.1808

4137712

.../functions.php:5925

0.1809

4137936

.../functions.php:6131

Answers to Questions and Exercises: Object-Oriented Programming Concepts

Answers to Questions

Real-world objects contain state and behavior.

A software object’s state is stored in fields.

A software object’s behavior is exposed through methods.

Hiding internal data from the outside world, and accessing it only through publicly exposed methods is known as data encapsulation.

A blueprint for a software object is called a class.

Common behavior can be defined in a superclass and inherited into a subclass using the extends keyword.

A collection of methods with no implementation is called an interface.

A namespace that organizes classes and interfaces by functionality is called a package.

The term API stands for Application Programming Interface.

Answers to Exercises

Your answers will vary depending on the real-world objects that you are modeling.

Your answers will vary here as well, but the error message will specifically list the required methods that have not been implemented.

Answers to Questions

Answers to Exercises

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