Interfaces and Inheritance – 飛奔嘅蝸牛

( ! ) 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	0.1473	4084448	require_once( '/var/www/html/wp-includes/template-loader.php )	.../wp-blog-header.php:19
4	0.1478	4113440	include( '/var/www/html/wp-content/themes/twentyfifteen/single.php )	.../template-loader.php:125
5	0.1478	4113440	get_header( $name = ???, $args = ??? )	.../single.php:10
6	0.1478	4113656	locate_template( $template_names = [0 => 'header.php'], $load = TRUE, $load_once = TRUE, $args = [] )	.../general-template.php:48
7	0.1478	4113752	load_template( $_template_file = '/var/www/html/wp-content/themes/twentyfifteen/header.php', $load_once = TRUE, $args = [] )	.../template.php:749
8	0.1478	4114296	require_once( '/var/www/html/wp-content/themes/twentyfifteen/header.php )	.../template.php:814
9	0.1480	4121704	wp_head( )	.../header.php:18
10	0.1480	4121704	do_action( $hook_name = 'wp_head' )	.../general-template.php:3197
11	0.1480	4121920	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
12	0.1480	4121920	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
13	0.1482	4125336	wp_enqueue_scripts( '' )	.../class-wp-hook.php:341
14	0.1482	4125336	do_action( $hook_name = 'wp_enqueue_scripts' )	.../script-loader.php:2311
15	0.1482	4125552	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
16	0.1482	4125552	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
17	0.1483	4127440	twentyfifteen_scripts( '' )	.../class-wp-hook.php:341
18	0.1484	4128960	wp_style_add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )	.../functions.php:440
19	0.1484	4128960	WP_Styles->add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )	.../functions.wp-styles.php:245
20	0.1484	4128960	WP_Dependencies->add_data( $handle = 'twentyfifteen-ie', $key = 'conditional', $value = 'lt IE 9' )	.../class-wp-styles.php:385
21	0.1484	4128960	_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	0.1484	4129280	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	0.1485	4135664	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

0.1473

4084448

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

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

0.1478

4113440

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

.../template-loader.php:125

0.1478

4113440

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

.../single.php:10

0.1478

4113656

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

.../general-template.php:48

0.1478

4113752

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

.../template.php:749

0.1478

4114296

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

.../template.php:814

0.1480

4121704

wp_head( )

.../header.php:18

0.1480

4121704

do_action( $hook_name = 'wp_head' )

.../general-template.php:3197

0.1480

4121920

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

.../plugin.php:522

0.1480

4121920

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

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

0.1482

4125336

wp_enqueue_scripts( '' )

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

0.1482

4125336

do_action( $hook_name = 'wp_enqueue_scripts' )

.../script-loader.php:2311

0.1482

4125552

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

.../plugin.php:522

0.1482

4125552

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

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

0.1483

4127440

twentyfifteen_scripts( '' )

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

0.1484

4128960

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

.../functions.php:440

0.1484

4128960

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

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

0.1484

4128960

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

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

0.1484

4128960

_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

0.1484

4129280

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

0.1485

4135664

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	0.1473	4084448	require_once( '/var/www/html/wp-includes/template-loader.php )	.../wp-blog-header.php:19
4	0.1478	4113440	include( '/var/www/html/wp-content/themes/twentyfifteen/single.php )	.../template-loader.php:125
5	0.1478	4113440	get_header( $name = ???, $args = ??? )	.../single.php:10
6	0.1478	4113656	locate_template( $template_names = [0 => 'header.php'], $load = TRUE, $load_once = TRUE, $args = [] )	.../general-template.php:48
7	0.1478	4113752	load_template( $_template_file = '/var/www/html/wp-content/themes/twentyfifteen/header.php', $load_once = TRUE, $args = [] )	.../template.php:749
8	0.1478	4114296	require_once( '/var/www/html/wp-content/themes/twentyfifteen/header.php )	.../template.php:814
9	0.1480	4121704	wp_head( )	.../header.php:18
10	0.1480	4121704	do_action( $hook_name = 'wp_head' )	.../general-template.php:3197
11	0.1480	4121920	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
12	0.1480	4121920	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
13	0.1482	4125336	wp_enqueue_scripts( '' )	.../class-wp-hook.php:341
14	0.1482	4125336	do_action( $hook_name = 'wp_enqueue_scripts' )	.../script-loader.php:2311
15	0.1482	4125552	WP_Hook->do_action( $args = [0 => ''] )	.../plugin.php:522
16	0.1482	4125552	WP_Hook->apply_filters( $value = '', $args = [0 => ''] )	.../class-wp-hook.php:365
17	0.1483	4127440	twentyfifteen_scripts( '' )	.../class-wp-hook.php:341
18	0.1859	4136768	wp_style_add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )	.../functions.php:444
19	0.1859	4136768	WP_Styles->add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )	.../functions.wp-styles.php:245
20	0.1859	4136768	WP_Dependencies->add_data( $handle = 'twentyfifteen-ie7', $key = 'conditional', $value = 'lt IE 8' )	.../class-wp-styles.php:385
21	0.1859	4136768	_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	0.1859	4137088	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	0.1861	4137312	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

0.1473

4084448

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

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

0.1478

4113440

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

.../template-loader.php:125

0.1478

4113440

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

.../single.php:10

0.1478

4113656

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

.../general-template.php:48

0.1478

4113752

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

.../template.php:749

0.1478

4114296

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

.../template.php:814

0.1480

4121704

wp_head( )

.../header.php:18

0.1480

4121704

do_action( $hook_name = 'wp_head' )

.../general-template.php:3197

0.1480

4121920

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

.../plugin.php:522

0.1480

4121920

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

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

0.1482

4125336

wp_enqueue_scripts( '' )

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

0.1482

4125336

do_action( $hook_name = 'wp_enqueue_scripts' )

.../script-loader.php:2311

0.1482

4125552

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

.../plugin.php:522

0.1482

4125552

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

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

0.1483

4127440

twentyfifteen_scripts( '' )

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

0.1859

4136768

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

.../functions.php:444

0.1859

4136768

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

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

0.1859

4136768

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

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

0.1859

4136768

_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

0.1859

4137088

.../functions.php:5925

0.1861

4137312

.../functions.php:6131

Interfaces and Inheritance

Interfaces

You saw an example of implementing an interface in the previous lesson. You can read more about interfaces here—what they are for, why you might want to write one, and how to write one.

Inheritance

This section describes the way in which you can derive one class from another. That is, how a subclass can inherit fields and methods from a superclass. You will learn that all classes are derived from the Object class, and how to modify the methods that a subclass inherits from superclasses. This section also covers interface-like abstract classes.

Interfaces

Inheritance

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