1. Up to now, we've only been working on the echo statement. The printf() statement does the same thing except it can accept arguments passed onto the function.
<?php
// This outputs the integer as a decimal number instead of part of a string
printf("This is my number : "%d", 60) ;
?>
2. You can also specify the start position of your string displayed
<?php
echo "<pre">;
// This will leave 15 spaces before printing
printf ("%15s\n", " Name");
printf ("%15s\n", " Address");
printf ("%15s\n", " Mobile Number");
printf ("%15s\n", " Email");
echo "<pre">;
?>
3. You can look up more string functions on www.php.net
• strlen() , to determine the length of a string
• strstr (), to determine the existence of a string within a string
• strpos(), to find the position of a substring
Working with Time and Date
1. PHP stores time as number of seconds that have elapsed since GMT midnight 1 January 1970. This is the time stamp
<?php
// This is the timestamp, It is the number of seconds since Unix Epoch (Midnight GMT 1 Jan 1970)
echo "The number of seconds that have passed since Midninght GMT 1 January 1970 is ";
echo time();
echo "<br>";
?>
2. With the timestamp you can convert it to date using getdate(). This is a an array that stores the vales of date.
<?php
$date_array = getdate(); // no argument passed so today's date will be used
foreach ($date_array as $key => $val) {
echo "$key = $val<br>";
}
?>
<hr>
<?
echo "Today's date: ".$date_array['mday']."/".$date_array['mon']."/".
$date_array['year']."<p>";
?>
Creating Forms
1. Use the following for testing.
1.1 Listing 9.1.html
<html>
<head>
<title>Listing 9.1 A simple HTML form</title>
</head>
<body>
<form action="listing9.2.php" method="POST">
<p><strong>Name:</strong><br>
<input type="text" name="user">
<p><strong>Address:</strong><br>
<textarea name="address" rows="5" cols="40"></textarea>
<P><input type="submit" value="send"></p>
</form>
</body>
</html>
1.2 Listing 9.2.php
<html>
<head>
<title>Listing 9.2 Reading input from a form </title>
</head>
<body>
<?php
echo "<p>Welcome <b>$_POST[user]</b></p>";
echo "<p>Your address is:<br><b>$_POST[address]</b></p>";
?>
</body>
</html>
There are two input boxes available from listing9.2.html called text and address. When the user submits the form it will invoke the script called listing9.2.php. The $_POST command will grab the value values corresponding to the text boxes value in listing9.1.html.
2. Getting data from a multi valued text box
2.1 Listing9.3.html
<html>
<head>
<title>Listing 9.3 An HTML form including a SELECT element</title>
</head>
<body>
<form action="listing9.4.php" method="POST">
<p><strong>Name:</strong><br>
<input type="text" name="user">
<p><strong>Address:</strong><br>
<textarea name="address" rows="5" cols="40"></textarea>
<p><strong>Select Some Products:</strong> <br>
<select name="products[]" multiple>
<option value="Sonic Screwdriver">Sonic Screwdriver</option>
<option value="Tricoder">Tricorder</option>
<option value="ORAC AI">ORAC AI</option>
<option value="HAL 2000">HAL 2000</option>
</select>
<p><input type="submit" value="send"></p>
</form>
</body>
</html>
<html>
<head>
<title>Listing 9.4 Reading input from the form in Listing 9.3</title>
</head>
<body>
<?php
echo "<p>Welcome <b>$_POST[user]</b></p>";
echo "<p>Your address is:<br><b>$_POST[address]</b></p>";
echo "<p>Your product choices are:<br>";
if (!empty($_POST[products])) {
echo "<ul>";
foreach ($_POST[products] as $value) {
echo "<li>$value";
}
echo "</ul>";
}
?>
</body>
</html>
3. Sending out emails
3.1 Listing9.10.html
<HTML>
<HEAD>
<TITLE>E-Mail Form</TITLE>
</HEAD>
<BODY>
<FORM action="listing9.11.php" method="POST">
<p><strong>Your Name:</strong><br> <INPUT type="text" size="25" name="name"></p>
<p><strong>Your E-Mail Address:</strong><br> <INPUT type="text" size="25" name="email"></p>
<p><strong>Message:</strong><br>
<textarea name="message" cols=30 rows=5></textarea></p>
<p><INPUT type="submit" value="send"></p>
</FORM>
</BODY>
</HTML>
<html>
<head>
<title>Listing 9.11 Sending mail from the form in Listing 9.10</title>
</head>
<body>
<?php
echo "<p>Thank you, <b>$_POST[name]</b>, for your message!</p>";
echo "<p>Your e-mail address is: <b>$_POST[email]</b></p>";
echo "<p>Your message was:<br>";
echo "$_POST[message] </p>";
//start building the mail string
$msg = "Name: $_POST[name]\n";
$msg .= "E-Mail: $_POST[email]\n";
$msg .= "Message: $_POST[message]\n";
//set up the mail
$recipient = "youremail@youraddress"; //Remember to change the email to your address
$subject = "ITC594 Workshop Testing";
$mailheaders = "From: My Web Site <http://192.168.6.200 \n";
$mailheaders .= "Reply-To: $_POST[email]";
//send the mail
mail($recipient, $subject, $msg, $mailheaders);
?>
</body>
</html>
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