Doing Things the WordPress Way

DOING THINGS THE

WordPress
WAY

By Matt Wiebe
Theme Designer, Plugin Developer
Soma Design – http://somadesign.ca/
Twitter – @mattwiebe

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

Script URL. Can be external.

LOADING JS/CSS

(Optional) Dependencies. Reference
the Script IDs scripts that should be
loaded before this one. (WP has many
built-in)

LOADING JS/CSS

(Optional) Version #.

LOADING JS/CSS

(Optional) Load in Footer. Defaults to
false, which loads in <head />

LOADING JS/CSS
// Or, register first, enqueue later

wp_register_script( 'script‐name', 

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

$c = curl_init();
curl_setop('ohcrapicantremember');

HTTP REQUESTS

$c = curl_init();
curl_setop('ohcrapicantremember');

// Screw it

HTTP REQUESTS

★ Not all PHP environments have
cURL installed

HTTP REQUESTS

cURL installed
★ The WP_Http class Standardizes the
HTTP requests for WordPress. Handles
cookies, gzip encoding and decoding,
chunk decoding…

HTTP REQUESTS

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 POST request
$post = wp_remote_post($url, $args);

HTTP REQUESTS


// Just the response body
$body = wp_remote_retrieve_body( $get );

HTTP REQUESTS


// Just the response body
$body = wp_remote_retrieve_body( $get );

// Just the response header
$h = wp_remote_retrieve_header( $get );

JSON
★ JSON (JavaScript Object Notation)
is the preferred way to exchange data

JSON
★ PHP 5.2 has json_encode() and
json_decode() functions

JSON
★ Many WP users are on earlier
versions of PHP

JSON
★ Many WP users are on earlier
versions of PHP
★ WP has a backwards compatibility
layer for PHP < 5.2 (since 2.9)

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
// already have $some_url defined
// want to add a query string

QUERY ARGUMENTS

$some_url .= "?get=something+awesome";

QUERY ARGUMENTS


// what if $some_url already had a "?" ?

QUERY ARGUMENTS


// 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
$params = array(
"get" => "something awesome",
"for" => "Matt",
"because" => "He's awesome"
);

QUERY ARGUMENTS
);

$url = add_query_arg( $params, $url );

QUERY ARGUMENTS
);

$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

Doing Things the WordPress Way

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Viewers also liked

Viewers also liked (17)

Similar to Doing Things the WordPress Way

Similar to Doing Things the WordPress Way (20)

Recently uploaded

Recently uploaded (20)

Doing Things the WordPress Way