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Doing Things the WordPress Way

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Matt Wiebe
Matt Wiebe

Be a better, stronger, more productive WP web developer by taking advantage of the WordPress way of doing things.

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DOING THINGS THE WordPress WAY By Matt Wiebe Theme Designer, Plugin Developer Soma Design – http://somadesign.ca/ Twitter – @mattwiebe
BRIEFLY ABOUT ME
THE ERUDITE
EVENTS CALENDAR PRO
EVENTS CALENDAR PRO
THE WP WAY
THE WP WAY ★ Loading JS/CSS
THE WP WAY ★ Loading JS/CSS ★ HTTP Requests
THE WP WAY ★ Loading JS/CSS ★ HTTP Requests ★ JSON
THE WP WAY ★ Loading JS/CSS ★ HTTP Requests ★ JSON ★ Email
THE WP WAY ★ Loading JS/CSS ★ HTTP Requests ★ JSON ★ Email ★ Query Arguments
LOADING JS/CSS <script
type="text/javascript"
src="path/to/script.js"
/> <link
rel="stylesheet"
href="path/to/style.css"
 type="text/css"
media="all"
/>
LOADING JS/CSS <script
type="text/javascript"
src="path/to/script.js"
/> <link
rel="stylesheet"
href="path/to/style.css"
 type="text/css"
media="all"
/> NEVER AGAIN
LOADING JS/CSS wp_enqueue_script(
'script‐name',
 'http://path/to/script.js',
 array('jquery'),
'1.0',
true
); Script ID – tells WP when to load, helps track dependencies
LOADING JS/CSS wp_enqueue_script(
'script‐name',
 'http://path/to/script.js',
 array('jquery'),
'1.0',
true
); Script URL. Can be external.
LOADING JS/CSS wp_enqueue_script(
'script‐name',
 'http://path/to/script.js',
 array('jquery'),
'1.0',
true
); (Optional) Dependencies. Reference the Script IDs scripts that should be loaded before this one. (WP has many built-in)
LOADING JS/CSS wp_enqueue_script(
'script‐name',
 'http://path/to/script.js',
 array('jquery'),
'1.0',
true
); (Optional) Version #.
LOADING JS/CSS wp_enqueue_script(
'script‐name',
 'http://path/to/script.js',
 array('jquery'),
'1.0',
true
); (Optional) Load in Footer. Defaults to false, which loads in <head
/>
LOADING JS/CSS //
Or,
register
first,
enqueue
later wp_register_script(
'script‐name',
 'http://path/to/script.js',
 array('jquery'),
'1.0',
true
); wp_enqueue_script(
'script‐name'
);
LOADING JS/CSS //
Similar
for
styles wp_enqueue_style(
'style‐name',
'http:// path/to/style.css',
array('deps'),
'1.0',
 'media
type');
HTTP REQUESTS //
How
does
this
curl
$h|†
work
again?
HTTP REQUESTS //
How
does
this
curl
$h|†
work
again? $c
=
curl_init(); curl_setop('ohcrapicantremember');
HTTP REQUESTS //
How
does
this
curl
$h|†
work
again? $c
=
curl_init(); curl_setop('ohcrapicantremember'); //
Screw
it
HTTP REQUESTS ★ Not all PHP environments have cURL installed
HTTP REQUESTS ★ Not all PHP environments have cURL installed ★ The WP_Http class Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk decoding…
HTTP REQUESTS ★ Not all PHP environments have cURL installed ★ The WP_Http class Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk decoding… ★ wp_remote_* functions provided
HTTP REQUESTS //
HTTP
GET
request $get
=
wp_remote_get($url);
HTTP REQUESTS //
HTTP
GET
request $get
=
wp_remote_get($url); //
HTTP
POST
request $post
=
wp_remote_post($url,
$args);
HTTP REQUESTS //
HTTP
GET
request $get
=
wp_remote_get($url); //
HTTP
POST
request $post
=
wp_remote_post($url,
$args); //
Just
the
response
body $body
=
wp_remote_retrieve_body(
$get
);
HTTP REQUESTS //
HTTP
GET
request $get
=
wp_remote_get($url); //
HTTP
POST
request $post
=
wp_remote_post($url,
$args); //
Just
the
response
body $body
=
wp_remote_retrieve_body(
$get
); //
Just
the
response
header $h
=
wp_remote_retrieve_header(
$get
);
JSON
JSON ★ JSON (JavaScript Object Notation) is the preferred way to exchange data
JSON ★ JSON (JavaScript Object Notation) is the preferred way to exchange data ★ PHP 5.2 has json_encode() and json_decode() functions
JSON ★ JSON (JavaScript Object Notation) is the preferred way to exchange data ★ PHP 5.2 has json_encode() and json_decode() functions ★ Many WP users are on earlier versions of PHP
JSON ★ JSON (JavaScript Object Notation) is the preferred way to exchange data ★ PHP 5.2 has json_encode() and json_decode() functions ★ Many WP users are on earlier versions of PHP ★ WP has a backwards compatibility layer for PHP < 5.2 (since 2.9)
EMAIL
EMAIL ★ Sending email sucks
EMAIL ★ Sending email sucks ★ WP's mail sending functionality makes it suck less
EMAIL ★ Sending email sucks ★ WP's mail sending functionality makes it suck less ★ Centralizes all email so that it can be overridden/manipulated by plugins
EMAIL /** 
*
$to
email
address(es)
to
send
to. 
*
$subject
Email
subject 
*
$message
Message
contents 
*
$headers
Optional.
Additional
headers. 
*
$attachments
Optional.
Files
to 
*
attach. 
*/ $success
=
wp_mail(
$to,
$subject,
 $message,
$headers,
$attachments
);
QUERY ARGUMENTS
QUERY ARGUMENTS //
already
have
$some_url
defined //
want
to
add
a
query
string
QUERY ARGUMENTS //
already
have
$some_url
defined //
want
to
add
a
query
string $some_url
.=
"?get=something+awesome";
QUERY ARGUMENTS //
already
have
$some_url
defined //
want
to
add
a
query
string $some_url
.=
"?get=something+awesome"; //
what
if
$some_url
already
had
a
"?"
?
QUERY ARGUMENTS //
already
have
$some_url
defined //
want
to
add
a
query
string $some_url
.=
"?get=something+awesome"; //
what
if
$some_url
already
had
a
"?"
? //
add_query_arg()
to
the
rescue $some_url
=
add_query_arg(
"get",
 "something
awesome",
$some_url
);
QUERY ARGUMENTS //
awesomer
syntax
QUERY ARGUMENTS //
awesomer
syntax $params
=
array( "get"
=>
"something
awesome", "for"
=>
"Matt", "because"
=>
"He's
awesome" );
QUERY ARGUMENTS //
awesomer
syntax $params
=
array( "get"
=>
"something
awesome", "for"
=>
"Matt", "because"
=>
"He's
awesome" ); $url
=
add_query_arg(
$params,
$url
);
QUERY ARGUMENTS //
awesomer
syntax $params
=
array( "get"
=>
"something
awesome", "for"
=>
"Matt", "because"
=>
"He's
awesome" ); $url
=
add_query_arg(
$params,
$url
); //
http://amazon.com/?get=something +awesome&for=Matt&because=He's+awesome
BONUS ROUND //
can't
remember
if
your
URL
has //
a
slash
at
the
end? $slashed_url
=
trailingslashit($url); //
No
slashes $unslashed_url
=
untrailingslashit($url);
BONUS ROUND /**
 
*
merging
arguments
and
defaults? 
*
$defaults
array
of
defaults 
*
$args
accepts
an
array
or
query 
*
string.
eg
cat_name=moo&tag=cow 
*
@return
an
array */ $args
=
wp_parse_args(
$defaults,
$args);
BONUS ROUND //
Override
WP's
jQuery
with
Google
CDN
 add_action(
'wp_enqueue_scripts',
 'sd_google_cdn'); function
sd_google_cdn()
{ wp_deregister_script(
'jquery'
); wp_enqueue_script(
'jquery',
'http:// ajax.googleapis.com/ajax/libs/jquery/ 1.4.4/jquery.min.js',
array(),
 '1.4.4',
true
); }
NOW YOU’LL DO THINGS THE WordPress WAY
THANKS! By Matt Wiebe Theme Designer, Plugin Developer Soma Design – http://somadesign.ca/ Twitter – @mattwiebe

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