how to set default timezone in php?

<?php

date_default_timezone_set('Europe/London');

echo date('Y-m-d H:i:s');

?>

how to fetch all supported timezones in PHP?

<?php

$timezone_offsets = array();

foreach(timezone_identifiers_list() as $timezone_identifier)

{

$date_time_zone = new DateTimeZone($timezone_identifier);

$date_time = new DateTime('now', $date_time_zone);

$timezone_offsets[$timezone_identifier] = $date_time_zone->getOffset($date_time);

}

echo "<pre>";

print_r($timezone_offsets);

?>

how to refresh particular div tag content without reloading page using jquery?

// Note : First include jquery.js file.....
<script type="text/javascript">
var auto_refresh = setInterval(
function ()
{
$('#load_div').load('load.php').fadeIn("slow");
}, 100000); // refresh every 10000 milliseconds
</script>

//index.php

<div id="load_div">
</div>

//load.php

In this page you can write your code.
like load randam user,image etc....

How to pass data from one domain to another domain(cross domain) using json?‏

//Javascript code

<script type="text/javascript">

$(document).ready(function()
{

var surl =  "http://www.example.com/json.php";

email_id=document.getElementById("email").value;

$.ajax({
url: surl,
data: {email:email_id},
dataType: "jsonp",
jsonp : "callback",
jsonpCallback: "jsonpcallback"
});
});

function jsonpcallback(rtndata)
{
document.getElementById("disp_data").innerHTML=rtndata.message;
}

</script>

//json.php file code

<?php

$display="<b>HI Json</b>";

$display.="<p>HI This is testing json.</p>";

$rtnjsonobj->message = $display;

echo $_GET['callback']. '('. json_encode($rtnjsonobj) . ')';

?>

error page using htaccess file

first create .htaccess  file and save it.

then write below code

ErrorDocument 404 /404.html

 

here

404 means when page not found then it occurs

404.html means that page which you want to display.

 

 

how to make captcha in php?

Captcha Code:

<?php
session_start();

$num='';

$string = "abcdefghijklmnopqrstuvwxyz0123456789";
for($i=0;$i<7;$i++){
$num1=rand(0,35);
$num .= $string{$num1};
}

$_SESSION["num1"]=$num;

$img=imagecreatefrompng('captcha.png');
$color=imagecolorallocate($img,255,255,255);
$color1=imagecolorallocate($img,0,0,0);
imagestring($img,9,10,3,$num,30);
$fontsize=20;
$fontcolor = imagecolorallocate($img, 0, 0, 0);
$x = 0;
$y = $fontsize;

header('Content-type : image/png');
imagepng($img);
imagedestroy($img);

?>

How to use in php?

<img id="cap" style="margin-left: 15px;" src="comman/captcha.php" alt="" />

How to refresh captcha?

Call the below function  onclick

<script >
function captcha()
{
document.getElementById('cap').src = document.getElementById('cap').src+ '?';
}
</script>

Save as captcha.png file

how to check path of ffmpeg or mencoder in linux in php?

<?php
$output = shell_exec('whereis ffmpeg');
echo "<pre>".$output."</pre>";
echo "";

$output = shell_exec('whereis mencoder');
echo "<pre>".$output."</pre>";
echo "";
?>

Output in browser :

how to backup mysql database using php?

<?php
$backfile="a.sql";
$command="mysqldump  -u root test>$backfile";//
system($command);
?>

PHP mail with attachment

<?php

//Set Email Subject
$subject = $_POST['sub'];
$message_email=$_POST['message'];
$message_email.='<br><br><br>'.$data;

//define the from \ reply to headers
$headers = "From: darshakkumarshah@mkics.in\r\nReply-To: darshakkumarshah@mkics.in";

//create a unique boundary string to delimit different parts of the email (plain text, html, file attachment)
$random_hash = md5(date('r', time()));

//add boundary string and mime type specification
$headers .= "\r\nContent-Type: multipart/mixed; boundary=\"PHP-mixed-".$random_hash."\"";

//read the atachment file contents into a string,
//encode it with MIME base64,
//and split it into smaller chunks for sending
$attachment = chunk_split(base64_encode(file_get_contents($file_nm)));

//define the body of the message.
$message = "--PHP-mixed-$random_hash\r\n"
."Content-Type: multipart/alternative; boundary=\"PHP-alt-$random_hash\"\r\n\r\n";
$message .= "--PHP-alt-$random_hash\r\n"
."Content-Type: text/plain; charset=\"iso-8859-1\"\r\n"
."Content-Transfer-Encoding: 7bit\r\n\r\n";

//Insert the plain text message.
$message .= strip_tags($data);
$message .= "\r\n\r\n--PHP-alt-$random_hash\r\n"
."Content-Type: text/html; charset=\"iso-8859-1\"\r\n"
."Content-Transfer-Encoding: 7bit\r\n\r\n";

//Insert the html message.
$message .= $message_email;
$message .="\r\n\r\n--PHP-alt-$random_hash--\r\n\r\n";

//include attachment
if(isset($_POST['checkbox']))
{
$message .= "--PHP-mixed-$random_hash\r\n"
."Content-Type: application/pdf; name=".$file_nm."\r\n"
."Content-Transfer-Encoding: base64\r\n"
."Content-Disposition: attachment\r\n\r\n";
$message .= $attachment;
$message .= "/r/n--PHP-mixed-$random_hash--";
}

//send the email
$mail = mail( $to, $subject , $message, $headers );

?>

Display data dynamically in Matrix format using PHP with pagination

<?php
$per_page = 6;
$display_columns = 3;
$page = isset($_GET['page']) ? (int) $_GET['page'] : 1;
$pages = implode(mysql_fetch_assoc(mysql_query("SELECT COUNT(*) FROM projects")));
//$pages= $pages/$display_columns;
$pages = ceil($pages / $per_page);
$querystring = "";
foreach ($_GET as $key => $value) {
if ($key != "page") $querystring .= "$key=$value&amp;";
}
echo "Pages: ";
for ($i = 1; $i <= $pages; $i++) {
echo "<a " . ($i == $page ? "class=\"selected\" " : "");
echo "href=\"?{$querystring}page=$i";
echo "\">$i</a> ";
}
$i="";

$sqlm="select * from projects LIMIT " . (($page - 1) * $per_page) . ", $per_page";
$rsm=mysql_query($sqlm) or die("Database Error".mysql_error());
$count = mysql_num_rows($rsm);
$padding = ($display_columns-1)-(($count-1)%$display_columns);
echo '<table cellpadding=10>';
while($row=mysql_fetch_array($rsm))
{

if($i%$display_columns == 0)
echo '<tr>';
echo '<td>';

$id=$row["id"];
$in_sql="select * from projects where id=$id";
$r=mysql_query($in_sql) or die("Database Error".mysql_error());
if($rw=mysql_fetch_array($r))
{
$image=$rw['img'];
}

?>
<td>
<img src="admin/pages/Upload/<?=$image; ?>" width="160" height="160" style="border:#999;border:double"><br />
<h4><a href="projects_view.php?id=<?=$id?>"><?=$rw['title'];?></a></h4><h4 align="center"><?=$rw['cat_id'];?></h4>
</td>
<?
echo '</td>';

if($i%$display_columns == $display_columns-1)
echo '</tr>';
$i++;
}
if($padding!=0)
{
for($i=0;$i<$padding;$i++)
echo '<td></td>';
echo '</tr>';
}
echo '</table>';


?>

PHP: Mail with HTML and mail() function.

<?php
include ("include/config.php");

$fname=$_POST['name'];
$email="From:".$_POST['email'];
$comp=$_POST['company'];
$msg1=$_POST['message'];

$tomail="swapn_developers@yahoo.com";
$msg="Company Name : " .$comp."
"."Message : " .$msg1;

$headers = "From: $email\r\n";
$headers .= "Content-type: text/html\r\n";

mail($tomail,"Contact Us Message",$msg,$headers);
?>

How to Download Image , txt file or any file without save as or without open in php?

<?php

$file=$_GET['file'];//get the file name

//$file = 'monkey.gif';

if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
exit;
}
?>