в 10:37, 26 мая 2010

2010-05-26T10:37:33Z

Admin: 1 версия

2010-05-26T07:05:23Z

1 версия

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==Changing the page type to CSV==



<source lang="html4strict">

// Tell the web client to expect a CSV file
header("Content-Type: text/csv");

</source>

==Changing the page type to XML==



<source lang="html4strict">

header("Content-Type: text/xml");

</source>

==Forcing File "Save As" Downloads==



<source lang="html4strict">

<?php
$path = "images/winter.jpg";
try {
if (is_file ($path)){
if ($file = fopen($path, "rb")) {
while(!feof($file) and (connection_status()==0)) {
$f .= fread($file, 1024*8);
}
fclose($file);
}
$outputname = "myimage";
header ("Content-type: image/jpeg");
header("Content-disposition: attachment; filename=".$outputname.".jpg");
print $f;
} else {
throw new exception ("Sorry, file path is not valid.");
}
} catch (exception $e){
echo $e->getmessage();
}

?>

</source>

==Good and bad Location headers==



<source lang="html4strict">

<?php
// Good Redirect
header("Location: http://www.wbex.ru");
?>

</source>

==If a User Is Not Logged in, the Login Form Is Loaded==



<source lang="html4strict">

<?php
session_start();
if (!isset($_SESSION["username"])) {
header("Location: /protected3/login.php?url=" . urlencode($_SERVER["SCRIPT_NAME"]));
}
?>

</source>

==Logged In with cookie==



<source lang="html4strict">

<?php
$auth = $_COOKIE["auth"];
header("Cache-Control:no-cache");
if( ! $auth == "ok" )
{
header("Location:login.php" );
exit();
}
?>

<html>
<head>
<title>Logged In</title>
</head>
<body>
You are logged in and can access all pages on this web site.
<a href="anotherpage.php"><br>Visit another page on this site ?</a>
</body>
</html>

</source>

==Mime types==



<source lang="html4strict">

application/msexcel Microsoft Excel data file

application/msword Microsoft Word data file

application/octet-stream Generic binary file

application/pdf Adobe PDF

application/x-shockwave-flash Macromedia Flash

application/zip Zip file

audio/mp3 MP3

audio/wav Wave sound file

audio/x-ogg Ogg file

font/ttf TrueType Font

image/bmp MS Windows .bmp image

image/gif GIF image

image/jpeg JPEG image

image/png PNG image

image/tiff TIFF image

image/svg+xml Scalable Vector Graphic (SVG)

text/html HTML file

text/plain Plain text

text/rtf Rich-Text File

text/tab-separated-values Tab-Separated Values (TSV)

text/xml XML

video/mpeg MPEG video

video/quicktime Quicktime video

</source>

==Reading Queued Headers==



<source lang="html4strict">

<?
header("Expires: Sat, 22 Dec 1979 05:30:00 GMT");
echo "This is some text for output.<br />";
if (!headers_sent($filename, $linenum)) {
header("Location: www.yoursite.ru");
exit;
} else {
echo "Headers already sent in $filename on line $linenum.<br />";
echo "Headers sent are:<br /> <UL>";
$headers = headers_list( );
foreach($headers as $header) {
echo "<LI>$header</LI>";
}
echo "</UL>";
exit;
}
?>

</source>

==Redirect header==



<source lang="html4strict">

<?php
$location = $_POST["location"];
$self = $_SERVER["PHP_SELF"];
if( $location != null )
{
header( "Location:$location") ;
exit();
}
?>

<html>
<head>
<title>Redirect</title>
</head>
<body>
Choose a site to visit:
<form action = "<?php $self ?>" method = "post">
<select name = "location">
<option value = "http://www.google.ru">Google</option>
<option value = "http://www.ebay.ru">Ebay</option>
</select>
<input type = "submit" name = "submit" value = "Go">
</form>
</body>
</html>

</source>

==Redirecting with query string variables==



<source lang="html4strict">

<?php
header("Location: http://www.example.ru/?monkey=turtle");
exit();
?>

</source>

==Sending an XML response==



<source lang="html4strict">

<?php header("Content-Type: text/xml"); ?>
<menu>
<dish type="appetizer">Chicken Soup</dish>
<dish type="main course">Fried Monkey Brains</dish>
</menu>

</source>

==Sending Content Types Other Than HTML==



<source lang="html4strict">

<html>
</head>
<body>
<div align="center">
<img src="index.php" alt="" title="" style="border: none;" />
</div>
</body>
</html>
<?php
$path = "myImage.jpg";
try {
if (is_file ($path)){
if ($file = fopen($path, "rb")) {
while(!feof($file) and (connection_status()==0)) {
$f .= fread($file, 1024*8);
}
fclose($file);
}
header ("Content-type: image/jpeg");
print $f;
} else {
throw new exception ("Sorry, file path is not valid.");
}
} catch (exception $e){
$animage = imagecreate (500, 500);
$red = imagecolorallocate ($animage, 255, 0, 0);
$white = imagecolorallocate ($animage, 255, 255, 255);
imagefilledrectangle ($animage, 0, 0, 500, 500, $white);
imagestring ($animage, 4, ((500 - (strlen($e->getmessage()) * imagefontwidth(4))) / 2), 5, $e->getmessage(), $red);
imagejpeg ($animage);
header ("Content-type: image/jpeg");
imagedestroy ($animage);
}

?>
Common File Format Content Types
Content Type Application
application/pdf Adobe Portable Document Format (PDF) types
application/msword Microsoft Word documents
application/excel Microsoft Excel documents
image/gif GIF images
image/png PNG images
application/octet-stream Zip files
text/plain Plain text (text files)

</source>

==Setting a Cookie Using the header() Function==



<source lang="html4strict">

<?php
header("Set-Cookie: mycookie=myvalue; path=/; domain=.demo.org");
?>

</source>

==Setting character encoding==



<source lang="html4strict">

<?php
header("Content-Type: text/html;charset=utf-8");
?>

</source>

==Using header() to Send Raw Headers==



<source lang="html4strict">

<?php
$num_to_guess = 42;
$message = "";
if (! isset ( $_POST ["guess"] )) {
$message = "Welcome!";
} else if ($_POST ["guess"] > $num_to_guess) {
$message = $_POST ["guess"] . " is too big!";
} else if ($_POST ["guess"] < $num_to_guess) {
$message = $_POST ["guess"] . " is too small!";
} else {
header ( "Location:congrats.html" );
exit ();
}
$guess = ( int ) $_POST ["guess"];
$num_tries = ( int ) $_POST ["num_tries"];
$num_tries ++;
?>
<html>
<head>
<title>A PHP Number Guessing Script</title>
</head>
<body>
<?php print $message?> Guess: <?php print $num_tries?><br />
<form method="post" action="<?php
print $_SERVER ["PHP_SELF"]?>">
<p><input type="hidden" name="num_tries"
value="<?php
print $num_tries?>" /> Number: <input
type="text" name="guess" value="<?php print $guess?>" /></p>
</form>
</body>
</html>

</source>

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PHP/HTML/header - История изменений

в 10:37, 26 мая 2010

Admin: 1 версия