Tag Archives: Code

Calculating memory used by PHP to generate that page

Do you know how much memory those loops are using ?
Why is this page taking so long to load ?
Well with this simple PHP code you can daily benchmark different versions of your script to use the least possible amount of Memory.

< ?php echo "Memory Usage: ". (function_exists('memory_get_usage') ? round(memory_get_usage()/1024/1024, 2) : 'Unknown') .'MB'."\n"; ?>

An example of this can be seen by visiting the Precision Badges New Zealand site, and viewing the page source, right down the bottom.

Mootools Gallery ZoomBox Plugin

I needed a simple lightweight Mootools Gallery Lightbox, and after a few googles, I found nothing that suited my needs with out all the extra ‘captions’ and grouping and bloat.

This is a simple zoom from start position type lightbox that uses only the Mootools Core version 1.2.4 at this time but should work with 1.3.x

I have used it on the Glass Effects web page which you can view for a demo.

You will notice on my class, I am adding a CSS class ‘shadow’ to the large image, this is used for basic styling and you can do any CSS you want to it. ( or none at all )

Here is how it is built up;

HTML:

< div id="photos">
	< ul>
		< li>< a href="http://www.glasseffects.co.nz/assets/volume1/2_large.jpg" class="zoomBox" title="Glass Effects - Painted toi toi image on glass splashback">< img src="http://www.glasseffects.co.nz/assets/volume1/2_small.jpg" alt="Glass Effects - Painted toi toi image on glass splashback" />< /a>< /li>
		< li>< a href="http://www.glasseffects.co.nz/assets/volume1/3_large.jpg" class="zoomBox" title="Glass Effects - Uniformed lines on Effects glass splashback">< img src="http://www.glasseffects.co.nz/assets/volume1/3_small.jpg" alt="Glass Effects - Uniformed lines on Effects glass splashback" />< /a>< /li>
		< li>< a href="http://www.glasseffects.co.nz/assets/volume1/5_large.jpg" class="zoomBox" title="Glass Effects - Textured Effect splashback using GlassArt colour #25 Iridium">< img src="http://www.glasseffects.co.nz/assets/volume1/5_small.jpg" alt="Glass Effects - Textured Effect splashback using GlassArt colour #25 Iridium" />< /a>< li>
		< li>< a href="http://www.glasseffects.co.nz/assets/volume1/6_large.jpg" class="zoomBox" title="Glass Effects - Stencilled Effect – toi toi. GJ Gardner Show Home, Tauranga">< img src="http://www.glasseffects.co.nz/assets/volume1/6_small.jpg" alt="Glass Effects - Stencilled Effect – toi toi. GJ Gardner Show Home, Tauranga" />< /a>< /li>
		< li>< a href="http://www.glasseffects.co.nz/assets/volume1/7_large.jpg" class="zoomBox" title="Glass Effects - Painted glass for bar. GlassArt colour #49 Red Red Red">< img src="http://www.glasseffects.co.nz/assets/volume1/7_small.jpg" alt="Glass Effects - Painted glass for bar. GlassArt colour #49 Red Red Red" />< /a>< /li>
	< /ul>
< /div>

JS ( In Page ):


window.addEvent('domready', function() {

	/* Any other JS needed for your page */
	
	var myZoomBox = new zoomBox();


	/* to set options */
	
	var myZoomBox = new zoomBox({
		zb_class:     '.mootools-ftw',
		zb_element:   'big_image',
		zb_loader:    './loading.gif'
	});

});

ZoomBox Class:

// Create the Mootools ZoomBox Class
var zoomBox = new Class({
	
	Implements : Options,
	// Editable Settings
    options: {
		zb_class:     '.zoomBox',                    // class of anchors/images to find on page.
		zb_element:   'zb_image',                    // id of zppmBox pop-up div
		zb_loader:    '/assets/images/loading.gif',  // path to loading image
		scale_image:  true,                          // scale large image if it is bigger than our screen size, bool true/false
		win_width:    1024,                          // basic window width, ignore
		win_height:   768                            // basic window height, ignore
    },

	initialize: function(options){
		// set options and internal settings
		this.setOptions(options);
		this.setWindowSize();
		this.currentIndex;
		this.images = new Array();
		this.positions = new Array();
		
		// create our loading image
		this.zb_loading = new Element('img', { 
			'id'    : 'zb_loading', 
			'src'   : this.options.zb_loader,
			'styles': { 
				'position': 'absolute',
				'display' : 'none',
				'left'    : 0,
				'top'     : 0
			}
		}).inject(document.body, 'bottom');

		// scan page for our class.
		this.thumbs = $$(this.options.zb_class);
		
		var self = this;
		
		// attach each image.
		this.thumbs.each(function(zb, index) {
			self.attach(zb, index);
		});
		
		// add event listener if the user resizes their window to scale max size of images.
		window.addEvent('resize', self.setWindowSize.bindWithEvent(this));
		
	},
	
	
	// attach out image and add event listeners.
	attach: function(zb, index) {
		var self     = this;
		// is we manually attach a new element this is needed.
		if(index == undefined) {
			index = (self.length + 1);
		}
		// set our basic width/heights.
		var zb_fx;
		var zb_src   = zb.get('href');
		var zb_org   = zb.getElements('img')[0];
		self.positions[index] = {};
		self.positions[index].zb_left = zb_org.getPosition().x;
		self.positions[index].zb_top  = zb_org.getPosition().y;
		// add out click event.
		zb.addEvent('click', function(clk) {
			new Event(clk).stop();
			// no point opening it, if its already open !
			if(!document.id(self.options.zb_element) || !document.id(self.options.zb_element).get('src').match(zb.get('href'))) {
				// add out loading gif to the image about to be opened.
				self.zb_loading.setStyles({
					'display' : '',
					'top'     : self.positions[index].zb_top,
					'left'    : self.positions[index].zb_left
				});
				// if we have one open, let it be gone
				if(document.id(self.options.zb_element)) {
					self.close(self.currentIndex);
				}
				// set current index.
				self.currentIndex = index;
				// create and place on top of the thumbnail. but keep it hidden.
				self.images[index] = new Element('img', { 
					'id'    : self.options.zb_element, 
					'src'   : zb_src,
					'styles': { 
						'position': 'absolute',
						'opacity' : 0,
						'left'    : self.positions[index].zb_left,
						'top'     : self.positions[index].zb_top
					}
				})
				.addClass('shadow') // we don't need this. but its basic styling for large image.
				.inject(document.body, 'bottom') // inject at teh bottom of our page.
				.addEvent('click', function(clk) {
					// bind out close even on clicking the new large image
					new Event(clk).stop();
					self.close(index);
				})
				// bind a load event so once the large image has loaded, we open it.
				.addEvent('load', function() {
					// get our large image size
					var zb_width  = self.images[index].getWidth();
					var zb_height = self.images[index].getHeight();
					// see if we need to scale it, so the image fits on screen.
					if(self.options.scale_image) {
						if(self.options.win_width < zb_width) {
							zb_width  = (self.options.win_width - 50);
							zb_height = (zb_width / zb_height) * zb_width;
						} 
						if(self.options.win_height < zb_height) {
							zb_height = Math.floor(self.options.win_height - 50);
							zb_width  = Math.floor((zb_height / zb_width) * zb_height);
						}
					}
					// set the imahe the size of the thumbnail
					self.images[index].setStyles({
						'width'   : zb_org.getWidth(),
						'height'  : zb_org.getHeight(),
						'cursor'  : 'pointer'
					});
					// hide teh loading gif/indicator 
					self.zb_loading.setStyle('display', 'none');
					// animate it BIG ! and center it on the screen
					var zb_fx = new Fx.Morph(self.images[index]).start({
						'top'     : ((self.options.win_height / 2) - (zb_height / 2)) + window.getScroll().y,
						'left'    : ((self.options.win_width / 2) - (zb_width / 2)),
						'width'   : zb_width,
						'height'  : zb_height,
						'opacity' : 1
					});
				});
			} else {
				// we have used it before, lets load it up.
				self.images[index].fireEvent('load');
			}
			// bind the 'escape' key to close the current image.
			window.addEvent('keyup', function(key) {
				if(key.code == 27) {
					self.close(index);
				} 
			});
		});
	},
	
	close: function(index) {
		var self = this;
		var zb_fx = new Fx.Morph(self.images[index], { 
			onComplete: function() {
				document.id(self.options.zb_element)
					.fade(0)
					.dispose();
			} 
		}).start({
			'top'     : self.positions[index].zb_top,
			'left'    : self.positions[index].zb_left,
			'width'   : 100,
			'height'  : 100,
			'opacity' : 0
		});
		window.removeEvents('keyup');
	},
	
	setWindowSize: function() {
		
		this.options.win_width = window.getWidth();
		this.options.win_height = window.getHeight();
		
	}
	
});

Download the Full Script:
[download id="11"]

Use PHP to find your mobile browser

I needed a quick way to include different files based on the if the visitor to a site is on a mobile device or a regular browser/computer.

Every browser has a user agent depending on the operating system, browser and system.

below are some common use agents, they can be found by echoing the server variable HTTP_USER_AGENT

< ?php echo $_SERVER['HTTP_USER_AGENT']; ?>

FireFox

Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7

Safari Mac

Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-en) AppleWebKit/523.10.3 (KHTML, like Gecko) Version/3.0.4 Safari/523.10 

Safari Windows

Mozilla/5.0 (Windows; U; Windows NT 6.0; en) AppleWebKit/522.13.1 (KHTML, like Gecko) Version/3.0.2 Safari/522.13.1 

Nexus One

Mozilla/5.0 (Linux; U; Android 2.1; en-us; Nexus One Build/ERD56C) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

Apple iPhone

Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543a Safari/419.3

Apple iPod Touch

Mozilla/5.0 (iPod; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/3A100a Safari/419.3 

Internet Explorer

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.2; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

PHP mobileAgent() Function

Here is my function, is it simple PHP function, is expects one paramerter, and array or expected user agents, but by leaving it blank, the function will use the default user agents.

Update: I have added more mobile user agents for older Android models, Blackberrry’s and the iPhone simulator. .

< ?php
	function mobileAgent($custom_agents = array()) {

		$agents = array_merge($custom_agents, array(
			'iphone',           // Apple iPhone
			'ipod',             // Apple iPod touch
			'aspen',            // iPhone simulator
			'nexus',            // Nexus One Android
			'dream',            // Pre 1.5 Android
			'android',          // 1.5+ Android
			'cupcake',          // 1.5+ Android
			'blackberry9500',   // Storm
			'blackberry9530',   // Storm
			'opera mini',       // Opera mobile
			'webos',            //  Nokia Browser
			'incognito',        // Other iPhone browser
			'webmate'           // Other iPhone browser
		));
		$user_agent = strtolower($_SERVER['HTTP_USER_AGENT']);
		foreach($agents as $agent) if(strpos($user_agent, $agent)) return TRUE;
		return FALSE;

	}
?>

Usage

	< ?php if(mobileAgent()): ?>
	
	
	< ?php else: ?>
	
	< ?php endif; ?>

Javascript URI Address Segment Selection

I use the great CodeIgniter, PHP Framework a lot, Most site’s now days I create use it. One of the many good things is that way it handles pages request’s and PHP $_SERVER['REQUEST_URI'] to find which page we are on.

Here is how it works;

http://www.sheldon.lendrum.co.nz/posts/my-segment/my-page/15/2009/12

Now the way we do things, is break the site up, based on the ‘segments or the URI.
EG:
I am in the ‘posts ( segment 1 )’ part of the site. from ther directs to to the particular post I am on.

Here is some VERY simple javascript to find out any segment I am in.

var currentLocation = window.location.toString();  // find out what page we are on
var hostName = 'http://'+ window.location.hostname; // find our current domain name
var uriString = currentLocation.replace(hostName, '');  // get our segments minus our domain name
var uriSegment = uriString.split('/'); create our segment array

A simple example of usage would be, if you were using a GREAT MOOTOOLS accordion for your navigation, and having one open, based on the address of your page

// set out Accordion toggler elements
var togglers = $$('h3.toggler');

// set out menu var
var showMenu;

// loop our toggler elements, and see if our URI segment matches their name ( in my example. )
togglers.each(function(item, index){
        if(item.get('html').toLowerCase() == uriSegment[1]) showMenu = index;
});

// if our URI segment matched nothing, set a default ( closed in my example )
if(showMenu == undefined) showMenu = -1;

// create our Accordion
new Accordion(togglers , $$('ul.element'), {
        duration: 250,
        display: showMenu,
        initialDisplayFx: false,
        onActive: function(toggler, element) {
                toggler.set('class', 'active');
        },
        onBackground: function(toggler, element) {
              toggler.set('class', '');
        }
});

Using Mootools Request.HTML response Javascript using $exec

Javascript frameworks are great, no matter which one you use their all built to do more, quickly.

I use Mootools for most of my JS needs, and something is I often use is the AJAX request functionality.

Today I needed to send not only HTML back, but Javascript.

Here are the steps I needed to follow to not only return my Javascript, but to attach it to my response with the Mootools function ‘$exec’

My HTML

Update

My Mootoold Javascript

	

Our Request Handler PHP script





< ?php

	/* QUERY OUR RECORDS FROM OUR GET DATA */

	$response = mysql_get_data_function($_GET);

	echo($response);

?>

Final Response

After running this ‘update’ script, we will have displayed information based on our GET data in the div ‘container’, removed our update link, shown a success message, and styled everything with out response javascript, all thanks to our nifty Mootools $exec function.

Non-Ascii charactors in my AJAX responses !?

A while ago, I co-wrote a large site with Ryan while I was working at Zipline Interactive, this site uses Mootools 0.98 as we found to be getting a lot of �������� all through the JAX requested response code.

For the life of US, we couldn’t figure out why? it’s not in the output if we called the data via a normal http request, so I looked for a fix.

  1. Upgrade the Mootools to version 1.2.2
  2. Add an enc type to the AJAX functions
    	new Request.HTML({
    		method: 'get',
    		url: '/examples/ajax.php',
    		data: { 'example': 'ajax-ascii' },
    		encoding: 'iso-8859-1',
    		onRequest: function() {
    			$('calendarMainEvent').empty().removeClass('calendarClosed');
    			$('calendarMainEvent').set('html', 'Loading');
    		},
    		onComplete: function(responseTree, responseElements, responseHTML, responseJavaScript) {
    			$('calendarMainEvent').empty().set('html', responseHTML);
    			$('calendarMainEvent').setProperty('class','calendarOpen');
    		},
    		onFailure: function() {
    			$('calendarMainEvent').empty().removeClass('calendarClosed');
    		}
    	}).send();
    
  3. Specifying the charset in the PHP that is outputting the AJAX response!

    < ?php
    
    if($_GET['ajax_request']) {
    
    header('Content-Type: text/html; charset=iso-8859-1');
    echo('

    Success'); /* More output code */ }

Matching the Character set

It didn’t occur to me right away that I need to specify the charset more than just in the <head> section of the page, but that was all it took.

Of course you want to match your PHP header, Javascript encoding and xHTML charsets all to the same with it is iso-xxx or utf-xx

Controlling Input with Mootools Javascript

On a project that I was recently working on, I had a series of text input boxes that I wanted to be numeric only fields. I have my PHP form validation to check that the data is numeric before entering any information in to the database, and I always use mysql_real_escape_string() on the data I am saving. But to save loat time and page refreshed, I decided to add some extra validation with the Mootools javascript library which I am using trough out the site already.

View Example

Update to Numbers Array

I have updated the Numbers array to include the number pad on full size keyboards.

Allowing Numbers:

Because I have a bunch of inputs that I need validated, I decided that I would assign each input with a matching class, then Scan the page for that class with my Javascript, then only allow specific key codes to be entered.

Your Age...

Inside of my DOM Ready state, I run this simple code.

window.addEvent('domready', function() {
	var numbers = [8, 48,49, 50, 51,52,53,54,55,56,96,97,98,99,100,101,102,103,104,105];
	$$('.numeric').each(function(item) {
		item.addEvent('keydown', function(key) {
			for (i = 0; i < numbers.length; i++) {
				if(numbers[i] == key.code) {
					return true;
				}
			}
			return false;
		});
	});
});

If you can see the line I have specified only the Key Codes that are allows, I have allowed for numeric numbers and the Delete Key.

	var numbers = [8, 48,49, 50, 51,52,53,54,55,56,96,97,98,99,100,101,102,103,104,105];

Other Uses:

You could disallow any key entry, This isnt a great idea, but could be used when maybe using an overlay, or special effect.

window.addEvent('domready', function() {
	window.addEvent('keydown', function() {  return false; });
});

Dissallowing Keys:

You could simply reverse this function, to block a small amount of keys rather than just allowing some, it would be as simple as changing the locations of your return true/false statements.

This example would allow anything except numbers.

window.addEvent('domready', function() {
	var numbers = [48,49, 50, 51,52,53,54,55,56,96,97,98,99,100,101,102,103,104,105];
	$$('.numeric').each(function(item) {
		item.addEvent('keydown', function(key) {
			for (i = 0; i < numbers.length; i++) {
				if(numbers[i] == key.code) {
					return false;
				}
			}
			return true;
		});
	});
});