In this tutorial you will learn how to make a simple contact form:
<?php
if(isset($_POST['submit'])) {
$to = "you@you.com";
$subject = "Form Tutorial";
$name_field = $_POST['name'];
$email_field = $_POST['email'];
$message = $_POST['message'];
$option = $_POST['radio'];
$dropdown = $_POST['drop_down'];
foreach($_POST['check'] as $value) {
$check_msg .= "Checked: $value\n";
}
$body = "From: $name_field\n E-Mail: $email_field\n $check_msg Option: $option\n Drop-Down: $dropdown\n Message:\n $message\n";
echo "Data has been submitted to $to!";
mail($to, $subject, $body);
} else {
?>
<form method="POST" action="mailer.php">
Name:
<input type="text" name="name" size="19"><br>
<br>
E-Mail:
<input type="text" name="email" size="19"><br>
<br>
<input type="checkbox" name="check[]" value="blue_color"> Blue<br>
<input type="checkbox" name="check[]" value="green_color"> Green<br>
<input type="checkbox" name="check[]" value="orange_color"> Orange<br>
<br>
<input type="radio" value="yes" name="radio"> YES<br>
<input type="radio" value="no" name="radio"> NO
<br>
<br>
<select size="1" name="drop_down">
<option>php</option>
<option>xml</option>
<option>asp</option>
<option>jsp</option>
</select><br>
<br>
Message:<br>
<textarea rows="9" name="message" cols="30"></textarea><br>
<br>
<input type="submit" value="Submit" name="submit">
</form>
<?php
}
?><?php echo "hi everyone"; ?>Here is a tutorial on how to make a simple captcha script
<?php
session_start();
$strlength = rand(4,7);
for($i=1;$i<=$strlength;$i++)
{
$textornumber = rand(1,3);
if($textornumber == 1)
{
$captchastr .= chr(rand(49,57));
}
if($textornumber == 2)
{
$captchastr .= chr(rand(65,78));
}
if($textornumber == 3)
{
$captchastr .= chr(rand(80,90));
}
}
$randcolR = rand(100,230);
$randcolG = rand(100,230);
$randcolB = rand(100,230);
/initialize image $captcha is handle dimensions 200,50
$captcha = imageCreate(200,50);
$backcolor = imageColorAllocate($captcha, $randcolR, $randcolG, $randcolB);
$txtcolor = imageColorAllocate($captcha, ($randcolR - 20), ($randcolG - 20), ($randcolB - 20));
for($i=1;$i<=$strlength;$i++)
{
$clockorcounter = rand(1,2);
if ($clockorcounter == 1)
{
$rotangle = rand(0,45);
}
if ($clockorcounter == 2)
{
$rotangle = rand(315,360);
}
//$i*25 spaces the characters 25 pixels apart
imagettftext($captcha,rand(14,20),$rotangle,($i*25),30,$txtcolor,"/arial.ttf",substr($captchastr,($i-1),1));
}
for($i=1; $i<=4;$i++)
{
imageellipse($captcha,rand(1,200),rand(1,50),rand(50,100),rand(12,25),$txtcolor);
}
for($i=1; $i<=4;$i++)
{
imageellipse($captcha,rand(1,200),rand(1,50),rand(50,100),rand(12,25),$backcolor);
}
//Send the headers (at last possible time)
header('Content-type: image/png');
//Output the image as a PNG
imagePNG($captcha);
//Delete the image from memory
imageDestroy($captcha);
$_SESSION[captchastr] = $captchastr;
?>Personally, I do my PHP development work with the help of Aptana and Notepad++. I love the speed of Notepad++ and the feature set of Aptana. Both are great and feature full PHP editors, which satisfy my needs to the fullest.
How about you?
]]>Do you have a pet, and if so, what is it and what is its name?
Personally, I have a cat and a dog. Dog's name is Max, but the cat's Greta. Max is so black that is barely visible when walking with him in the dark. 
Greta is a crazy cat girl turning all the rooms upside down. She also likes to be on the front of the camera, I've attached a photo of her.
I am from Massachusetts, United States.
Where are you from?
]]>In this tutorial you will learn how to make a simple PHP calculator
<?php
if($submit)
{
if($operator == '*')
{
echo $numa * $numb;
} elseif($operator == '/')
{
echo $numa / $numb;
} elseif($operator == '+')
{
echo $numa + $numb;
} elseif($operator == '-')
{
echo $numa - $numb;
}
} else { ?>
<form method="POST" action="<?php $_SERVER['PHP_SELF']; ?>">
<input type="text" name="numa" size="10">
<select name="operator">
<option value="+">Add</option>
<option value="-">Subtract</option>
<option value="*">Multiply</option>
<option value="/">Divide</option>
</select>
<input type="text" name="numb" size="10">
<input type="submit" value="Calculate" name="submit">
</form>
<?php } ?>
Read more: http://www.webdesign.org/web/web-programming/php/php-calculator.10025.html#ixzz0TUVwwSdsI think you should post instead of the date the post was made to the name of thread that was posted in.
Just an idea if you need help doing this just let me know via PM or right here.
-John
]]>i dont like the fact that the field is no longer seen as empty if it consists even of one space
how to make that the field is empty although it would contain even 100 spaces?
thanks
]]>NEW EDIT TO THIS TOPIC:
what usually results in these errors is poor script design. when one processes a form, they should do it BEFORE OUTPUTTING ANYTHING TO THE BROWSER. there is NO reason that the process cannot be operated in the header of the document, before any HTML is output.
let's take a common example. the programmer wants a login form which checks the username and password against the database. if they don't match, then don't set a cookie remembering them and tell them it failed. if they do match, set the cookie and send them to a member page. many will do:
[HTML starting the page and layout]
[PHP processing the form]
[form code]
because they can simply echo any errors straight from PHP right above that form. they can also send a success message, set the cookie, and header() them off on their merry way without seeing the form again. it's a logical place to put this code. think again. you'll (perhaps not so) obviously get header errors when you go to use setcookie() and header(). if the login fails, it's dandy, but if you have a successful login the user gets nowhere.
answer: put the processing in the header, and store the results in variables. perhaps a $result variable that is 1 if successful, 0 if failed. then $output that contains either a success message or customized error messages. the new code would look like:
[PHP processing the form (if it was sent) and storing the results]
[HTML starting the page and layout]
[PHP echoing the results]
[form code if failed - exit(); if successful]
this will solve your header errors and will make for much more maintainable and readable code. if you want to redirect them elegantly (with a success message), use a <meta> refresh redirect. header() should only be used in instances where instant redirection is desired.
]]>In this tutorial I'll write some basic PHP code on how to find if a number is odd or even.
The idea behind the code is that even numbers have zero reminder when divided by 2, while odd numbers have 1 as a reminder after division by 2. For this I'll use PHP modulus operator (%).
<?php
if ($number % 2 == 0)
{
echo "even";
}
else
{
echo "odd";
}
?>