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// This script will generate 14 Character long very secure password
function secure_pass()
{
// The total length of the password is PASS_LEN + LEVEL1_LEN + LEVEL2_LEN
$PASS_LEN = 10; // Length of basic password (a-z)
$LEVEL1_LEN = 2; // Number of level 1 characters (1-9)
$LEVEL2_LEN = 2; // Number of level 2 characters (any other)

$LEVEL0 = 'abcdefghijklmnpqrstuvwxyz'; // no security
$LEVEL1 = '123456789'; // better security
$LEVEL2 = '_-!?*:.'; // best security

srand((double)microtime()*1000200);
$password = NULL;

// Level 0 password generation
for ($i=0;$i<$PASS_LEN;$i++)
$password = $password.$LEVEL0{rand(0,strlen($LEVEL0))};

$pos = rand(0,strlen($password)-1);
$password{$pos} = strtoupper($password{$pos});

// Level 1 mix up
for ($i=0;$i<$LEVEL1_LEN;$i++)
{
$pos = rand(0,strlen($password)-1);
$password = substr($password,0,$pos).$LEVEL1{rand(0,strlen($LEVEL1)-1)}.substr($password,$pos);
}

// Level 2 mix up
for ($i=0;$i<$LEVEL2_LEN;$i++)
{
$pos = rand(0,strlen($password)-1);
$password = substr($password,0,$pos).$LEVEL2{rand(0,strlen($LEVEL2)-1)}.substr($password,$pos);
}

return $password;
}

kaynak: ordan burdan

<?php
function delete_dir($dir){
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
if(is_dir($dir."/".$file)){
delete_dir($dir."/".$file);
}else{
chmod($dir."/".$file,0777);
unlink($dir."/".$file);
}
}
}
closedir($handle);
}
rmdir($dir);
}
?>

kaynak: ordan burdan

<?
function calendar($time=NULL){

// $time must be a valid unix timestamp to be used.
if (!preg_match('#[0-9]{1,10}#i',$time))
$time = time();

// Make some useful vars.
$zt = ' '; $zn = "
"; $out = ''; $day = 0;
$wd = array('Su','Mo','Tu','We','Th','Fr','Sa');
$utd = 86400; // Seconds in a day.

// Get the year and month based on $time.
$info = explode(' ',date('Y m',$time));

// Unix timestamp of the first and last day of the month.
$ut1 = mktime(0,0,0,$info[1],1,$info[0]);
$ut2 = mktime(0,0,0,$info[1],date('t',$ut),$info[0]);

// Output line 1: Full month and year.
$out .= rtrim(str_pad(date('F Y',$ut1),20,' ',STR_PAD_BOTH)).$zn;

// Output line 2: Days of the week.
for ($i=0;$i<count($wd);$i++){
$out .= $wd[$i];
if ($i < count($wd)-1) $out .= $zt;
}
$out .= $zn;

// Output lines 3 and up.
for ($ut=$ut1;$ut<=$ut2;$ut+=$utd){
$day++;

// Output line 3: Empty days.
if ($day == 1){
for ($i=0;$i<date('w',$ut);$i++){
$out .= ' '.$zt;
}
}

// Output: The day.
$out .= str_pad($day,2,' ',STR_PAD_LEFT);

// Output: Newline or tab.
if (date('w',$ut) == 6 || $day == date('t',$ut))
$out .= $zn; else $out .= $zt;

// If last day, stop.
if ($day == date('t',$ut))
break;
}

// Return the calendar!
return $out;
}
?>

kaynak: ordan burdan

<?
header("Content-Type: application/vnd.ms-excel");

echo "<table border=1>
<tr>
<td>Cell 1</td>
<td>Cell 2</td>
</tr>
</table>";
?>

kaynak: ordan burdan

<?php
$filename = "hits.txt" ;

if(!file_exists($filename)){
$fd = fopen ($filename , "w+");
fclose($fd);
}

$file = file($filename);
$file = array_unique($file);
$hits = count($file);
echo $hits;

$fd = fopen ($filename , "r");
$fstring = fread ($fd , filesize ($filename)) ;
fclose($fd) ;
$fd = fopen ($filename , "w");
$fcounted = $fstring."n".getenv("REMOTE_ADDR");
$fout= fwrite ($fd , $fcounted );
fclose($fd);
?>

kaynak: ordan burdan

<?
$array = array(1, "hello", 1, "world", "hello");

print_r(array_count_values($array));

?>

kaynak: ordan burdan

Açılan listeler
İlk olarak ele almak istediğim konu açılan (dropdown) listeler ile ilgili. Biliyorsunuz ki açılan listeler yapmak üzere select ve option etiketleri birlikte kullanılır. Örnek olarak Türkiye'nin illerinden oluşan kısa bir liste hazırlayalım. Bu liste Marmara, Ege ve Akdeniz bölgelerinden 3 adet şehir içersin.

Böyle bir liste hazırlamak için genellikle alttaki gibi bir kodlama yapılıyor:

<select>
<option> Marmara -> İstanbul </option>
<option> Marmara -> Bursa </option>
<option> Marmara -> Kocaeli </option>
<option> Ege -> İzmir </option>
<option> Ege -> Aydın </option>
<option> Ege -> Denizli </option>
<option> Akdeniz -> Antalya </option>
<option> Akdeniz -> İçel </option>
<option> Akdeniz -> Adana </option>
</select>

Bilgisayar