function genRandomString($length) {
$characters = ’0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ’;
$string = ”;
for ($p = 0; $p < $length; $p++)
$string .= $characters[mt_rand(0, strlen($characters)-1)];
return $string;
}

Basically, with Ajax I was calling a php file, which will return the result of a query, let’s say it’s somebody’s name now. If that name contains special characters, first you have to call the following function in the php file:

function fix_str($str){
$str = htmlentities($str, ENT_COMPAT, ‘UTF-8′);
$str = str_replace(chr(10),”,$str);
$str = str_replace(chr(13),’
’,$str);
$str = rawurlencode($str);
return $str;
}

This guarantees that the result sent back to the jQuery won’t be messed up…

On the Javascript side, to get the result well formatted, if you have the Ajax call result in the variable “resp”:

str = unescape(resp);

This way you will be able to pass any character through the Ajax call.

<form name=”formname” method=”POST” action=”?action=dosomething”>

Check all: <input type=”checkbox” name=”checkall” id=”checkall” value=”Check All” onclick=”Check(‘formname’,$(‘.check_list’))”>

Option 1<input type=’checkbox’ class=”check_list” name=”check_list[]” value=”1″>
Option 2<input type=’checkbox’ class=”check_list” name=”check_list[]” value=”2″>
Option 3<input type=’checkbox’ class=”check_list” name=”check_list[]” value=”3″>

</form>

The corresponding Javascript code:

function Check(form_name,chk){ // alternate check all/check none of items

if(eval(“document.”+form_name+”.checkall.value”)==”Check All”){
for (i = 0; i < chk.length; i++)
chk[i].checked = true ;
eval(“document.”+form_name+”.checkall.value=’UnCheck All’”);
}

else{
for (i = 0; i < chk.length; i++)
chk[i].checked = false ;
eval(“document.”+form_name+”.checkall.value=’Check All’”);
}

}

There’s a given 2 dimensional array:

$array[] = array(“id”=>1,”title”=>”Monkey”);
$array[] = array(“id”=>2,”title”=>”Alien”);
$array[] = array(“id”=>3,”title”=>”Stargate”);
$array[] = array(“id”=>4,”title”=>”New”);

We use the usort function of PHP:

usort($array, “cmp”);

… where cmp is the following function:

function cmp($a, $b){
return strcmp($a["title"], $b["title"]);
}

After sorting the $a array, it will look like this:

$array[0] = array(“id”=>2,”title”=>”Alien”);
$array[1] = array(“id”=>1,”title”=>”Monkey”);
$array[2] = array(“id”=>4,”title”=>”New”);
$array[3] = array(“id”=>3,”title”=>”Stargate”);

Now, the array is sorted by ‘title’ in ascending order. To sort in in descending order, just change the order of the compared elements in the cmp function:

return strcmp($b["title"], $a["title"]);

$file_name = “myfile.xls”;

header(‘Pragma: public’);
header(‘Expires: 0′);
header(‘Cache-Control: must-revalidate, post-check=0, pre-check=0′);
header(‘Cache-Control: public’);
header(‘Content-Description: File Transfer’);
header(‘Content-Type: text/xls; name=”‘ . $file_name . ‘”‘);
header(‘Content-Disposition: attachment; filename=”‘ . $file_name . ‘”‘);
header(‘Content-Transfer-Encoding: binary’);

$content = ‘<table>
<tr>
<td>Header1 (A)</td>
<td>Header2 (B)</td>
<td>Header3 (C)</td>
</tr>
<tr>
<td>Content 1A</td>
<td>Content 1B</td>
<td>Content 1C</td>
</tr>
<tr>
<td>Content 2A</td>
<td>&nbsp;</td>
<td>Content 2C</td>
</tr>
</table>’;

echo $content

$server = ‘{imap.strato.de:143}’;
$connection = imap_open($server, “youremail@yourdomain.nl”, “yourpassword”);

print_r(imap_errors());

$mailboxes = imap_list($connection, $server, ‘*’);

foreach($mailboxes as $mailbox)
$shortname = str_replace($server, ”, $mailbox);

imap_reopen($connection, $server.’INBOX’);

$count = imap_num_msg($connection);

for($i = 1; $i <= $count; $i++) {
$header = imap_headerinfo($connection, $i);
$raw_body = imap_body($connection, $i);
}

$server – the connection parameteres, differs from server to server. For exemple:

• Google: {imap.gmail.com:993/ssl/novalidate-cert}

• Google Apps: {imap.googlemail.com:993/ssl/novalidate-cert}

$connection: this is the IMAP stream

$mailboxes: will contain all the mailboxes you have (Inbox, Trash, Sent + persobal mailboxes)

$shortname: will contain just the name of the mailboxes, without their server address

imap-reopen: you can make a new stream, connecting to a given mailbox (INBOX in my case)

$count: how many mails do you have in the selected mailbox

- the last for cycle runs through the mailbox, and for every e-mail gets it’s header information ($header) and the mail’s content ($raw_body)

Here are some definitions for start…:

define(“DB_HOST”, “localhost”);
define(“DB_DATABASE”, “is_general”);
define(“DB_DATABASE_NEW”, “is_general”);
define(“DB_USERNAME”, “general”);
define(“DB_PASSWORD”, “g3n3r@l”);

Connect to the original database:

mysql_connect(DB_HOST, DB_USERNAME, DB_PASSWORD);
mysql_select_db(DB_DATABASE);

Create the new database and add an existing user to it (in our case, general) with all privileges:

mysql_query(“CREATE DATABASE “.DB_DATABASE_NEW);
mysql_query(“GRANT ALL PRIVILEGES ON “.DB_DATABASE_NEW.”.* TO ‘general’@'%’ WITH GRANT OPTION”);

Get all the table names from the original table (here you must be careful, because if there are dependecies, as foreign keys from one table the another, it can cause some problems, as the order of the tables is important when they will be recreated):

$r = mysql_query(“SELECT Table_name,Table_rows FROM information_schema.tables WHERE TABLE_SCHEMA = ‘is_default’”);
while ($d= mysql_fetch_assoc($r))
$tables[] = $d['Table_name'];

If the database is not empty, so it contains tables:

if (is_array($tables))
foreach ($tables as $v){

Connect to the new database and create the tables with their structure:

$r = mysql_query(“SHOW CREATE TABLE `”.$v.”`”);
$d= mysql_fetch_assoc($r);
mysql_select_db(DB_DATABASE_NEW);
mysql_query($d['Create Table']);

Copy the data from original table:

$data = ”;
mysql_select_db(DB_DATABASE);
$r = mysql_query(“SELECT * FROM `”.$v.”`”);
while ($d= mysql_fetch_assoc($r))
$data[] = $d;

Paste the data into the corresponding table in the new database:

mysql_select_db(DB_DATABASE_NEW);
if (is_array($data))
foreach ($data as $d)
// and here you will insert the data “$d” into the table “$v”, as this is not truly related to this post, and you should learn from yourself too…

}