Posted By

mb2o on 04/15/11

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Last Edited at 04/15/11 05:00pm

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Create a Basic Web Service Using PHP, MySQL, XML, and JSON

/ Published in: PHP

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<?php

/* require the user as the parameter */
if(isset($_GET['user']) && intval($_GET['user'])) {

/* soak in the passed variable or set our own */
	$number_of_posts = isset($_GET['num']) ? intval($_GET['num']) : 10; //10 is the default
	$format = strtolower($_GET['format']) == 'json' ? 'json' : 'xml'; //xml is the default
	$user_id = intval($_GET['user']); //no default

/* connect to the db */
	$link = mysql_connect('localhost','username','password') or die('Cannot connect to the DB');
	mysql_select_db('db_name',$link) or die('Cannot select the DB');

/* grab the posts from the db */
	$query = "SELECT post_title, guid FROM wp_posts WHERE post_author = $user_id AND post_status = 'publish' ORDER BY ID DESC LIMIT $number_of_posts";
	$result = mysql_query($query,$link) or die('Errant query:  '.$query);

/* create one master array of the records */
	$posts = array();
	if(mysql_num_rows($result)) {
		while($post = mysql_fetch_assoc($result)) {
			$posts[] = array('post'=>$post);
		}
	}

/* output in necessary format */
	if($format == 'json') {
		header('Content-type: application/json');
		echo json_encode(array('posts'=>$posts));
	}
	else {
		header('Content-type: text/xml');
		echo '<posts>';
		foreach($posts as $index => $post) {
			if(is_array($post)) {
				foreach($post as $key => $value) {
					echo '<',$key,'>';
					if(is_array($value)) {
						foreach($value as $tag => $val) {
							echo '<',$tag,'>',htmlentities($val),'</',$tag,'>';
						}
					}
					echo '</',$key,'>';
				}
			}
		}
		echo '</posts>';
	}

/* disconnect from the db */
	@mysql_close($link);
}

URL: http://davidwalsh.name/web-service-php-mysql-xml-json

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