PHP – dom.hastin.gs

Thu 31st Mar 2011

jQuery serializeObject 0.1

I found myself in a situation recently where I wanted to have access to variables that would have been posted, in a the same structure as if the form had been posted and returned the JSON, using this jQuery plugin and Douglas Crockford’s JSON library, I think I’ve done it!

You can download the script here and there’s a demo here.

Mon 25th Oct 2010Fri 10th Jun 2011

simpleGallery 0.2 – Minor updates

I’ve updated the gallery script I created in July. I’ve re-factored the code into a static class for easier modification and have created a config.ini settings file, to save modifying the script itself.

New features:

* Image titles
* Separate configuration
* Standard mode with safe URLs as well as mod_rewrite enabled ‘nice’ URLs
* Added ‘..’ parent folder to galleries

The demo page has been updated and the script is available to download here.

Wed 14th Jul 2010Wed 14th Jul 2010

Gallery 0.1

I recently took it upon myself to create a very small gallery project to easily display images from a folder structure in a fairly pleasing way…

This is the result!

You can get the script here

Mon 15th Feb 2010Mon 15th Feb 2010

XML Entities in PHP

Because htmlentities() doesn’t even come close.

This small file contains 4 functions (2 of which are taken from the PHP manual, credit given!) which will allow you to encode and decode entities from ASCII/unicode strings in either decimal or hexadecimal format for use in valid XML documents.

The xml_entity_decode() function accepts an optional second parameter to allow non-standard XML entities (that may have been specified in your schema) in the format:

array(
  // 'entity' => 'char'
  'amp' => '&',
  'lt' => '<',
  'gt' => '>',
  'apos' => '\'',
  'quot' => '"'
)

array(

// 'entity' => 'char'

'amp' => '&',

'lt' => '<',

'gt' => '>',

'apos' => '\'',

'quot' => '"'

)

Example usage:

include('funcs.xmlentities.php');

$s = '<strong>This</strong> should be safe, but don\'t assume!<br/>';
print '<Field>'.xmlentities($s).'</Field>';
// outputs: <Field>&lt;strong&gt;This&lt;/strong&gt; should be safe, but don&apos;t assume!&lt;br/&gt;</Field>

include('funcs.xmlentities.php');

$s = 'This should be safe, but don\'t assume! ';

print '<Field>'.xmlentities($s).'</Field>';

// outputs: <Field>This should be safe, but don't assume! </Field>

You can get the script here, or there’s a demo here too.

Wed 7th Oct 2009Wed 7th Oct 2009

PHP CSV Reader

I’ve never really built a definitive CSV reader and end up building a quick implementation of one any time I need one.

But after working on the chunk script I decided that next time I build a CSV class I’d do it properly.

This is the result:

  <?php
  require('class.csv.php');

  header('Content-type: text/plain');

  $csv = new CSV('test.csv');

  while ($row = $csv->read()) {
    print_r($row);
  }

<?php

require('class.csv.php');

header('Content-type: text/plain');

$csv = new CSV('test.csv');

while ($row = $csv->read()) {

print_r($row);

}

There’s an information page here, and the script is here.

Thu 27th Aug 2009Thu 18th Feb 2010

CakePHP: Select Box Pagination

Using CakePHP’s built in pagination system has saved me so much time in my current day job, but the latest designs I’m working on have drop-down box style pagination, as it’s possible to get many pages of results.

To change the named parameters in the current URL I’ve created this small javascript function that will amend the URL: Continue reading “CakePHP: Select Box Pagination”

Wed 26th Aug 2009Wed 26th Aug 2009

CakePHP: Components, redirect fail (On my part…)

I’ve been working on a CakePHP project lately and created a small component which was only needed in one of my controllers:

class CounterComponent extends Component {
  var $components = array(
    'Session'
  );

  function i() {
    if ($this->Session->check('Counter.i')) {
      $i = ($this->Session->read('Counter.i') + 1);

    } else {
      $i = 0;
    }

    $this->Session->write('Counter.i', $i);

    return $i;
  }

  function clear() {
    $this->Session->delete('Counter.i');
  }
}

class CounterComponent extends Component {

var $components = array(

'Session'

);

function i() {

if ($this->Session->check('Counter.i')) {

$i = ($this->Session->read('Counter.i') + 1);

} else {

$i = 0;

}

$this->Session->write('Counter.i', $i);

return $i;

}

function clear() {

$this->Session->delete('Counter.i');

}

Continue reading “CakePHP: Components, redirect fail (On my part…)”

Wed 19th Aug 2009Wed 26th Aug 2009

PHP: Object Oriented Image Manipulation

I’ve been working on a CMS lately and having to create thumbnails for uploaded images is always a pain, lots of maths working out the correct sizes and such, so I’ve created a fairly small script to manipulate images in an object-oriented style.

For example:

scale(400, 300);
$image-&gt;write('small-image.jpg');

$image2 = new Image('image2.jpg');
$image2-&gt;watermark = 'sample.png';
$image2-&gt;output();

scale(400, 300);

$image->write('small-image.jpg');

$image2 = new Image('image2.jpg');

$image2->watermark = 'sample.png';

$image2->output();

I’ve only implemented a few of the GD library methods, but I think these are the most useful methods. I might have to work on something that rounds the corners too, but I don’t have any need for it just yet.

There’s a demo page as ever, and you can get the script here (It’s a bit big, because the sample image is included, here’s one without it).

Fri 14th Aug 2009Fri 14th Aug 2009

String Variable Concatenation

I stumbled across something odd today in PHP:

$r = '';
$r .= $r .= $r .= 'a';

1 2	$r = ''; $r .= $r .= $r .= 'a';

Now, personally, I’d have expected a syntax error from the above code, but the result was even more confusing at first…

print $r; // 'aaaa'

1	print $r; // 'aaaa'

Not sure if this was the expected output or not I tested similar code in other languages:

Ruby:

r = ''
r += r += r += 'a'
puts r # 'a'

r = ''

r += r += r += 'a'

puts r # 'a'

Python:

r = ''
r += r += r += 'a'
#   File "", line 1
#     r += r += r += 'a'
#             ^
# SyntaxError: invalid syntax

r = ''

r += r += r += 'a'

# File "", line 1

# r += r += r += 'a'

# ^

# SyntaxError: invalid syntax

Javascript:

var r = '';
r += r += r += 'a';
alert(r); // 'a'

var r = '';

r += r += r += 'a';

alert(r); // 'a'

Perl:

my $r = '';
$r .= $r .= $r .= 'a';
print $r; // 'aaaa'

my $r = '';

$r .= $r .= $r .= 'a';

print $r; // 'aaaa'

That explains it!

So the reason the string is ‘aaaa’ seems to be that the code is evaluated from right to left:

$r = '';
$r += $r += $r += 'a';

// How it works:
//
// $r += 'a'; // 'a'
// $r += $r += 'a'; // 'a' + 'a';
// $r += $r += $r += 'a'; // 'aa' + ('a' + 'a')

$r = '';

$r += $r += $r += 'a';

// How it works:

// $r += 'a'; // 'a'

// $r += $r += 'a'; // 'a' + 'a';

// $r += $r += $r += 'a'; // 'aa' + ('a' + 'a')

I don’t think it’s a bug, well, at least I assume not, but is there a name for this?

Update: I asked some clever people for help understanding it.

Tue 28th Jul 2009Thu 30th Jul 2009

JSS 0.2 – Nested CSS update

So I thought I’d update the JSS script I wrote previously with a few changes I’ve been thinking about for a while.

The primary reason for the update is to add a new ‘non-CSS’ property of ‘include’. This property allows you to include styles that have already been defined in the current class. Continue reading “JSS 0.2 – Nested CSS update”