Some Use full PHP Programs

1. MySQL Database connection using PHP.

<?php
$config = array('host'=>'localhost', 'user'=>'webuser', 'pass'=>'123', 'databse'=>'class');
$link=mysql_connect($config['host'],$config['uname'],$config['pass']) or die("Database Connection Failed".mysql_error());
mysql_select_db($config['database'], $link) or die("database cannot be selected".mysql_error());
 
?>

2. Display thumbnail image from youtube or vimeo video.

function video_image($url){
   $image_url = parse_url($url);
     if($image_url['host'] == 'www.youtube.com' || 
        $image_url['host'] == 'youtube.com'){
         $array = explode("&", $image_url['query']);
         return "http://img.youtube.com/vi/".substr($array[0], 2)."/0.jpg";
     }else if($image_url['host'] == 'www.youtu.be' || 
              $image_url['host'] == 'youtu.be'){
         $array = explode("/", $image_url['path']);
         return "http://img.youtube.com/vi/".$array[1]."/0.jpg";
     }else if($image_url['host'] == 'www.vimeo.com' || 
         $image_url['host'] == 'vimeo.com'){
         $hash = unserialize(file_get_contents("http://vimeo.com/api/v2/video/".
         substr($image_url['path'], 1).".php"));
         return $hash[0]["thumbnail_medium"];
     }
}

<img src="<?php echo video_image('youtube URL'); ?>" />

3. PHP function to get age for date of birth.

function age_from_dob($dob){
$dob = strtotime($dob);
$y = date('Y', $dob);
 if (($m = (date('m') - date('m', $dob))) < 0) {
  $y++;
 } elseif ($m == 0 && date('d') - date('d', $dob) < 0) {
  $y++;
 }
return date('Y') - $y;
}

echo age_from_dob('2005/04/19'); date in yyyy/mm/dd format.

4. Random password generation using PHP.

(1)

echo substr(md5(uniqid()), 0, 8);

(2)

function rand_password($length){
  $chars =  'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
  $chars .= '0123456789' ;
  $chars .= '!@#%^&*()_,./<>?;:[]{}\|=+';

  $str = '';
  $max = strlen($chars) - 1;

  for ($i=0; $i < $length; $i++)
    $str .= $chars[rand(0, $max)];

  return $str;
}

echo rand_password(16);

5. Get date difference PHP.

date_default_timezone_set("Asia/Calcutta");

function dt_differ($start, $end){
  $start = date("G:i:s:m:d:Y", strtotime($start));
  $date1=explode(":", $start);

  $end  = date("G:i:s:m:d:Y", strtotime($end));
  $date2=explode(":", $end);
	
  $starttime = mktime(date($date1[0]),date($date1[1]),date($date1[2]),
  date($date1[3]),date($date1[4]),date($date1[5]));
  $endtime   = mktime(date($date2[0]),date($date2[1]),date($date2[2]),
  date($date2[3]),date($date2[4]),date($date2[5]));

  $seconds_dif = $starttime-$endtime;

  return $seconds_dif;
}


// call the function

  $today = date("Y-n-j H:i:s");
  $fromday = "2012-12-31 23:59:59";
  $timediffer = dt_differ($fromday, $today);
  echo $timediffer." seconds";

6.Zip Multiple Files and Download

This script will zip multiple files and  force download created zip file. This function required Zip Archive enable in your server.

<?php

function zipFilesDownload($file_names,$archive_file_name,$file_path){
$zip = new ZipArchive();
if ($zip->open($archive_file_name, ZIPARCHIVE::CREATE )!==TRUE) {
  exit("cannot open <$archive_file_name>\n");

}
foreach($file_names as $files){
  $zip->addFile($file_path.$files,$files);

}
$zip->close();


header("Content-type: application/zip"); 
header("Content-Disposition: attachment; filename=$archive_file_name"); 
header("Pragma: no-cache"); 
header("Expires: 0"); 
readfile("$archive_file_name"); 
exit;

}


$fileNames=array('files/file1.docx','files/file1.pdf');
$zip_file_name='myFile.zip';
$file_path=dirname(__FILE__).'/';

zipFilesDownload($fileNames,$zip_file_name,$file_path);

?>

Unzip Files in Web server

<?php
$zip = zip_open("moooredale.zip");
  if ($zip) {
   while ($zip_entry = zip_read($zip)) {
   $fp = fopen(zip_entry_name($zip_entry), "w");
   if (zip_entry_open($zip, $zip_entry, "r")) {
   $buf = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));
   fwrite($fp,"$buf");
   zip_entry_close($zip_entry);
   fclose($fp);
 }
}
zip_close($zip);
}
?>