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Generate An Authentication Code in PHP
# This particular code will generate a random string
# that is 25 charicters long 25 comes from the number
# that is in the for loop
$string = "abcdefghijklmnopqrstuvwxyz0123456789";
for($i=0;$i<25 font="" i="">
$pos = rand(0,36);
$str .= $string{$pos};
}
echo $str;
# If you have a database you can save the string in
# there, and send the user an email with the code in
# it they then can click a link or copy the code
# and you can then verify that that is the correct email
# or verify what ever you want to verify
?>
Date format validation in PHP
Validate a date in “YYYY-MM-DD” format.
function checkDateFormat($date)
{
//match the format of the date
if (preg_match ("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts))
{
//check weather the date is valid of not
if(checkdate($parts[2],$parts[3],$parts[1]))
return true;
else
return false;
}
else
return false;
}
Unzip a Zip File
function unzip($location,$newLocation){
if(exec("unzip $location",$arr)){
mkdir($newLocation);
for($i = 1;$i< count($arr);$i++){
$file = trim(preg_replace("~inflating: ~","",$arr[$i]));
copy($location.'/'.$file,$newLocation.'/'.$file);
unlink($location.'/'.$file);
}
return TRUE;
}else{
return FALSE;
}
}
?>
//Use the code as following:
include 'functions.php';
if(unzip('zipedfiles/test.zip','unziped/myNewZip'))
echo 'Success!';
else
echo 'Error';
?>
Basic PHP email() function code
Below is the code for the baic email function. We can take the script and actually use a form on our website to set the variables in the script above to send an email.
//if "email" variable is filled out, send email
if (isset($_REQUEST['email'])) {
//Email information
$admin_email = "someone@example.com";
$email = $_REQUEST['email'];
$subject = $_REQUEST['subject'];
$comment = $_REQUEST['comment'];
//send email
mail($admin_email, "$subject", $comment, "From:" . $email);
//Email response
echo "Thank you for contacting us!";
}
//if "email" variable is not filled out, display the form
else {
?>
Email:
Subject:
Message:
}
?>
So let’s now review what the form is actually doing.
1. The first part checks to make sure the email input field is filled out. If it is not, then it will display the HTML form on the page. If the email is in fact, set (after the visitor fills out the form), it is ready to send.
2. When the submit button is pressed, after the form is filled out, the page reloads and reads that the email input is set, so it sends the email.
Keep in mind, this is a basic tutorial to explain how to use the mail() function in PHP. Using the method, exactly the way it is, can be insecure and should not be used on your website. This tutorial is aiming to provide you the basic of how to use phpmail() and for further use, you may want to look into securing your code to possible hacks.
You may also use the PHP Mailer
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