Tip: How do I insert javascript in php code?

[lgoss]

To embed client side code like HTML or JavaScript into your PHP code, you simply need to use echo/print like below.
<?
echo "<script language=\"JavaScript\">\n";
echo "alert("javascript from php");\n";
echo "</script>";
?>
This is especially helpful for form validation with JavaScript.

[kgun]

Advice:

Always start php code with: <?php and not <?

Great example:

The PHP Anthology: Object Oriented PHP Solutions

<?php
class Message {
var $message;
function Message() {}
function setMessage($message)
{
$this->message = $message;
}
function getMessage()
{
return $this->message;
}
}
class PoliteMessage extends Message {
function PoliteMessage()
{
$this->setMessage('How are you today?');
}
}

class TerseMessage extends Message {
function TerseMessage()
{
$this->setMessage('Howzit?');
}
}

class RudeMessage extends Message {
function RudeMessage()
{
$this->setMessage('You look like *%&* today!');
}
}

class MessageReader {
var $messages;
function MessageReader(& $messages)
{
$this->messages = & $messages;
$this->readMessages();
}
function readMessages()
{
foreach ( $this->messages as $message ) {
echo ( $message->getMessage().'
' );
}
}
}

$classNames = array ('PoliteMessage','TerseMessage','RudeMessage');
srand ((float)microtime()*1000000);
shuffle ($classNames);
$messages = array();
for ( $i = 0; $i < 10; $i++ ) {
shuffle($classNames);
$messages[] = new $classNames[0]();
}
$messageReader = new MessageReader($messages);
?>

Note the following:

Blue code:
$classNames = Array of message objects that are children of (extends) the parent class Message.

Red code:
The MerssageReader class takes an array of message objects in its constructor.

This is effective code. May be the same technique can be used on an email parser.

[lgoss]

On servers with shorthand support enabled you can start a scripting block with <? and end with ?>. Thanks for the advice though....

[kgun]

But does it not make the code less portable?

[lgoss]

This option is turned on by default in php.ini via short_open_tag = 1 so unless someone has manually changed it in thier ini file it presents no problem as this is the case back to PHP 3.0. Again, thanks for the advice though....

[kgun]

I know.

Problem:

The short tag style causes problem in a document where PHP is mixed with XML.

Example:

<?xml

will mistake an XML instruction with a PHP opening tag.