Skidoosh » PHP

WordPress JPEG Thumbnail Image Quality Setting and Adjustment

Glyn Mooney — Mon, 21 Mar 2011 15:18:21 +0000

Well, I had to do some digging around deep in the WordPress internals for this one! If you want to set the image quality of the thumbnails from the “the_post_thumbnail” function/template tag add the following line to your functions.php file to override the default value of 90%:

add_filter('jpeg_quality', function($arg){return 100;});

On some production environments you may get a “unexpected T_FUNCTION” error (older versions of PHP 5 don’t like anonymous functions). In this situation go for the following:

function jpeg_quality_callback($arg)
{
return (int)100;
}

add_filter('jpeg_quality', 'jpeg_quality_callback');

Here I’m setting the quality to 100%, but you can set it to whatever value suits your project. You have to set the “$arg” to swallow the argument that get’s passed to the original function in the “image_resize” function in the media.php file.

Hope this helps! Leave a comment if it did!

Create Twitter like date formatted strings with PHP

Glyn Mooney — Mon, 12 Apr 2010 13:50:46 +0000

Well I got a little bored and decided to code this function. It creates the old Twitter like date format i.e. About 4 minutes ago, etc.. As you can see the code below has a few tests so you can decipher how to use it.

<?php
#If your running PHP > 5.3 you need to set this or your app will throw errors
date_default_timezone_set('Europe/London');

function twitter_time_format ($date) {

$blocks = array (
array('year', (3600 * 24 * 365)),
array('month', (3600 * 24 * 30)),
array('week', (3600 * 24 * 7)),
array('day', (3600 * 24)),
array('hour', (3600)),
array('min', (60)),
array('sec', (1))
);

#Get the time from the function arg and the time now
$argtime = strtotime($date);
$nowtime = time();

#Get the time diff in seconds
$diff = $nowtime - $argtime;

#Store the results of the calculations
$res = array ();

#Calculate the largest unit of time
for ($i = 0; $i < count($blocks); $i++) {    $title = $blocks[$i][0];    $calc = $blocks[$i][1];    $units = floor($diff / $calc);    if ($units > 0) {
$res[$title] = $units;
}
}

if (isset($res['year']) && $res['year'] > 0) {
if (isset($res['month']) && $res['month'] > 0 && $res['month'] < 12) {    $format = "About %s %s %s %s ago"; $year_label = $res['year'] > 1 ? 'years' : 'year';
$month_label = $res['month'] > 1 ? 'months' : 'month';
return sprintf($format, $res['year'], $year_label, $res['month'], $month_label);
} else {
$format = "About %s %s ago";
$year_label = $res['year'] > 1 ? 'years' : 'year';
return sprintf($format, $res['year'], $year_label);
}
}

if (isset($res['month']) && $res['month'] > 0) {
if (isset($res['day']) && $res['day'] > 0 && $res['day'] < 31) {    $format = "About %s %s %s %s ago"; $month_label = $res['month'] > 1 ? 'months' : 'month';
$day_label = $res['day'] > 1 ? 'days' : 'day';
return sprintf($format, $res['month'], $month_label, $res['day'], $day_label);
} else {
$format = "About %s %s ago";
$month_label = $res['month'] > 1 ? 'months' : 'month';
return sprintf($format, $res['month'], $month_label);
}
}

if (isset($res['day']) && $res['day'] > 0) {
if ($res['day'] == 1) {
return sprintf("Yesterday at %s", date('h:i a', $argtime));
}
if ($res['day'] <= 7) {
return date("\L\a\s\\t l \a\\t h:i a", $argtime);
}
if ($res['day'] <= 31) { return date("l \a\\t h:i a", $argtime); } } if (isset($res['hour']) && $res['hour'] > 0) {
if ($res['hour'] > 1) {
return sprintf("About %s hours ago", $res['hour']);
} else {
return "About an hour ago";
}
}

if (isset($res['min']) && $res['min']) {
if ($res['min'] == 1) {
return "About one minut ago";
} else {
return sprintf("About %s minuts ago", $res['min']);
}
}

if (isset ($res['sec']) && $res['sec'] > 0) {
if ($res['sec'] == 1) {
return "One second ago";
} else {
return sprintf("%s seconds ago", $res['sec']);
}
}
}

$now = date(DATE_RFC2822, time());
$anhourago = date(DATE_RFC2822, time() - (3600));
$fourhoursago = date(DATE_RFC2822, time() - (3600 * 4));
$yesterday = date(DATE_RFC2822, time() - (3600 * 24));
$lastweek = date(DATE_RFC2822, time() - (3600 * 24 * 6));
$lastmonth = date(DATE_RFC2822, time() - (3600 * 24 * 31));
$threemonthsago = date(DATE_RFC2822, time() - (3600 * 24 * 31 * 3));
$ayearago = date(DATE_RFC2822, time() - (3600 * 24 * 365));
$fiveyearsago = date(DATE_RFC2822, time() - (3600 * 24 * 365 * 5));

echo 'Now (should be empty): ' . twitter_time_format($now) . '
';
echo 'An Hour Ago: ' . twitter_time_format($anhourago) . '
';
echo 'Four Hours Ago: ' . twitter_time_format($fourhoursago) . '
';
echo 'Yesterday: ' . twitter_time_format($yesterday) . '
';
echo 'Last Week: ' . twitter_time_format($lastweek) . '
';
echo 'Last Month: ' . twitter_time_format($lastmonth) . '
';
echo 'Three Months Ago: ' . twitter_time_format($threemonthsago) . '
';
echo 'A Year Ago: ' . twitter_time_format($ayearago) . '
';
echo 'Five Years Ago: ' . twitter_time_format($fiveyearsago) . '
';
?>

Hope this helps!

Convert a date to a UNIX timestamp with PHP

Glyn Mooney — Mon, 15 Mar 2010 23:43:11 +0000

In this article I will cover how to convert a date from such things as a database like MySQL, RSS feed or other formats into a UNIX timestamp. Firstly for some people it will be handy to know what a UNIX timestamp actually is. A UNIX timestamp is the number of seconds that have passed since midnight on the 1st January, 1970 also known as the birth of modern computing.

In PHP there two; nice, simple functions for generating UNIX timestamps. The first is the “time()” function used as follows:

<?php
//Get the current UNIX timestamp
$now = time();
//Get the date one week from now as a UNIX timestamp
$nextweek = $now + (3600 * 24 * 7);
//Get the date last week as a UNIX timestamp
$nextweek = $now + (3600 * 24 * 7);
//Compare the dates
if ($lastweek < $nextweek) echo 'Next week is greater than last week';
?>

I think you can gather from that that UNIX timestamps are quite useful when you need to calculate or compare dates. Because a UNIX timestamp is in seconds it is treated like any other integer number.

Now for the function we would use to generate a UNIX timestamp from a date:

<?php
//The following date could be any date in
//ISO 8601, RFC 2822 and even non ISO
//or RFC standards
$date = date('Y-m-d h:i:s');
//Get the UNIX timestamp
$timestamp = strtotime($date);
?>

As you can see it’s really quite simple to get a UNIX timestamp from a date. But that’s not all you can do all sorts of amazing things with dates in PHP. To see more great examples of just how flexible the strtotime function really is just look at the PHP function reference at http://php.net/manual/en/function.strtotime.php.

Hope this helps.

CakePHP Aptana and Eclipse PDT code completion that works

Glyn Mooney — Thu, 17 Dec 2009 00:44:38 +0000

I keep seeing people asking the question “How do I get code completion to work in Aptana and Eclipse PDT?”. A lot of the time I see the Helper fix but nothing else! With a bit of fiddling I’ve finally got a complete solution that works! Here how I did it:

Follow this guide to enable the .thtml or .ctp file extentions: Setting up Eclipse to work with Cake

Create a dummy file in your cake root directory with the following code:

<?php
exit();
//declare and define all of the helpers
//to helper enable codecompletion
if(1 == 0) {
$ajax = new AjaxHelper();
$cache = new CacheHelper();
$form = new FormHelper();
$html = new HtmlHelper();
$javascript = new JavascriptHelper();
$number = new NumberHelper();
$session = new SessionHelper();
$text = new TextHelper();
$time = new TimeHelper();
}
?>

Then to get the Model code completion from within controllers create an app_controller.php file in you app directory and add a dummy function with the following code:

<?php
class AppController extends Controller {
public function dummy () {
//for each of your models add a definition and declaration
//like the ones that follow
$this->User = new User();
$this->Post = new Post();
}
}
?>

So with a bit of luck this will help you on your way. Thanks for reading!