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Unified conditional arguments and replaced APC example

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This commit is contained in:
Nick Adams
2012-08-14 23:15:25 +12:00
parent 876ec7515d
commit 4f086c3aca
3 changed files with 11 additions and 15 deletions
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2
_posts/03-05-01-Command-Line-Interface.md
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@@ -22,7 +22,7 @@ Let's write a simple "Hello, $name" CLI program. To try it out, create a file na
{% highlight php %}
<?php
if($argc != 2) {
if ($argc != 2) {
echo "Usage: php hello.php [name].\n";
exit(1);
}

13
_posts/05-03-01-Date-and-Time.md
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@@ -16,7 +16,7 @@ output.
$raw = '22. 11. 1968';
$start = \DateTime::createFromFormat('d. m. Y', $raw);
echo "Start date: " . $start->format('m/d/Y') . "\n";
echo 'Start date: ' . $start->format('m/d/Y') . "\n";
{% endhighlight %}
Calculating with DateTime is possible with the DateInterval class. DateTime has methods like `add()` and `sub()` that
@@ -30,18 +30,18 @@ $end = clone $start;
$end->add(new \DateInterval('P1M6D'));
$diff = $end->diff($start);
echo "Difference: " . $diff->format('%m month, %d days (total: %a days)') . "\n";
echo 'Difference: ' . $diff->format('%m month, %d days (total: %a days)') . "\n";
// Difference: 1 month, 6 days (total: 37 days)
{% endhighlight %}
On DateTime objects you can use standard comparison:
{% highlight php %}
<?php
if($start < $end) {
if ($start < $end) {
echo "Start is before end!\n";
}
{% endhighlight %}
One last example to demonstrate the DatePeriod class. It is used to iterate over recurring events. It can take two
DateTime objects, start and end, and the interval for which it will return all events in between.
{% highlight php %}
@@ -49,10 +49,9 @@ DateTime objects, start and end, and the interval for which it will return all e
// output all thursdays between $start and $end
$periodInterval = \DateInterval::createFromDateString('first thursday');
$periodIterator = new \DatePeriod($start, $periodInterval, $end, \DatePeriod::EXCLUDE_START_DATE);
foreach($periodIterator as $date)
{
foreach ($periodIterator as $date) {
// output each date in the period
echo $date->format('m/d/Y') . " ";
echo $date->format('m/d/Y') . ' ';
}
{% endhighlight %}

11
_posts/10-03-01-Object-Caching.md
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@@ -28,15 +28,12 @@ Example logic using APC:
{% highlight php %}
<?php
// check if there is data saved as 'expensive_data' in cache
$data = apc_fetch('expensive_data');
if (!$data)
{
// data not in cache, do expensive call and save for later use
$data = get_expensive_data();
apc_store('expensive_data', $data);
if (apc_fetch('expensive_data') === false) {
// data is not in cache; save expensive call for later use
apc_add('expensive_data', get_expensive_data());
}
print_r($data);
print_r(apc_fetch('expensive_data'));
{% endhighlight %}
Learn more about popular object caching systems: