Code
Detect Browser Language in PHP
<?php
$lang = getenv("HTTP_ACCEPT_LANGUAGE");
$set_lang = explode(',', $lang);
if (isset($_POST['lang']))
{
$taal = $_POST['lang'];
setcookie("lang", $taal);
header('Location: /p/');
}
else
{
setcookie("lang", $set_lang[0]);
echo $set_lang[0];
echo '<br>';
echo $set_lang[1];
header('Location: /p/');
}
?>
Nivo slider options
$("#nivoSlider").nivoSlider({
effect: 'random', // Specify sets like: 'fold,fade,sliceDown'
slices: 15, // For slice animations
boxCols: 8, // For box animations
boxRows: 4, // For box animations
animSpeed: 500, // Slide transition speed
pauseTime: 3000, // How long each slide will show
startSlide: 0, // Set starting Slide (0 index)
directionNav: true, // Next & Prev navigation
controlNav: true, // 1,2,3... navigation
controlNavThumbs: false, // Use thumbnails for Control Nav
pauseOnHover: true, // Stop animation while hovering
manualAdvance: false, // Force manual transitions
prevText: 'Prev', // Prev directionNav text
nextText: 'Next', // Next directionNav text
randomStart: false, // Start on a random slide
beforeChange: function(){}, // Triggers before a slide transition
afterChange: function(){}, // Triggers after a slide transition
slideshowEnd: function(){}, // Triggers after all slides have been shown
lastSlide: function(){}, // Triggers when last slide is shown
afterLoad: function(){} // Triggers when slider has loaded
});
W3C compliant optimization for retina display images @2x.png
How to insert a picture 2x retina display with W3C compliant rules,
the image is displayed with the size of the css to 50% of actual size.
// HTML <img src="/[email protected]" alt="logo" id="PNGlogo" width="200" height="200"> // CSS #PNGlogo { width:100px; height:100px; }
PDO connection with MySQL
<?PHP
# gestione delle eccezioni in fase di connessione con PDO
// collegamento al database
$col = 'mysql:host=localhost;dbname=DATABASE_NAME';
// blocco try per il lancio dell'istruzione
try {
// connessione tramite creazione di un oggetto PDO
$db = new PDO($col , 'username', 'password');
}
// blocco catch per la gestione delle eccezioni
catch(PDOException $e) {
// notifica in caso di errorre
echo 'Attenzione: '.$e->getMessage();
}
/* disabilitazione dell'auto-commit
$db->beginTransaction();
// esecuzione delle query
$sql = $db->exec("UPDATE filnet_page SET img_code = 'AU002.jpgTEST' WHERE id = 67");
// applicazione delle modifiche
$db->commit(); */
# utilizzo del metodo query()
// definizione della query
$sql = 'SELECT field1, field2 FROM table_name ORDER BY id';
// visualizzazione dei risultati
foreach($db->query($sql) as $row){ ?>
PHP directory listing in reverse order, function rsort
rsort
(PHP 4, PHP 5)
rsort — Sort an array in reverse order
Case history
PHP directory listing in reverse order
Description
bool rsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
This function sorts an array in reverse order (highest to lowest).
Parameters
array
The input array.
sort_flags
You may modify the behavior of the sort using the optional parameter sort_flags, for details see sort().
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 rsort() example
<?php
$fruits = array("lemon", "orange", "banana", "apple");
rsort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
?>
Output
0 = orange 1 = lemon 2 = banana 3 = apple
List files dir in PHP
<?php
//open the current directory
$directory = opendir('.');
while ($file = readdir($directory))
{
$filenames[] = $file;
}
foreach ($filenames as $file)
{
echo "$file<br>";
}
?>
PHP function calculate the distance between two coordinates (latitude, longitude)
function distance($lat1, $lng1, $lat2, $lng2, $miles = true)
{
$pi80 = M_PI / 180;
$lat1 *= $pi80;
$lng1 *= $pi80;
$lat2 *= $pi80;
$lng2 *= $pi80;
$r = 6372.797; // mean radius of Earth in km
$dlat = $lat2 - $lat1;
$dlng = $lng2 - $lng1;
$a = sin($dlat / 2) * sin($dlat / 2) + cos($lat1) * cos($lat2) * sin($dlng / 2) * sin($dlng / 2);
$c = 2 * atan2(sqrt($a), sqrt(1 - $a));
$km = $r * $c;
return ($miles ? ($km * 0.621371192) : $km);
}