Practical PHP Class OOP Tutorial
Listening Video
This is a practical class file creation and usage tutorial. Working with class files and objects opens up a wider range of modularity and helps you avoid instance collisions when many object instances simultaneously access a method or property.
Modularity - refers to the compartmentalization and inter-relation of the parts of a software package.
Object oriented programming should only be used when you have a practical need to reuse a scripted module, or share a complex scripted module with others in a common usage format. You can give people a few simple usage instructions and your class file to allow them to have all the programming power you provide in the class package.
strongpass.php(the class file)
<?php
class strongpass {
public function check($password){
$response = "OK";
if(strlen($password) < 8){
$response = "Password must be at least 8 characters";
} else if(is_numeric($password)){
$response = "Password must contain at least one letter";
} else if(!preg_match('#[0-9]#', $password)){
$response = "Password must contain at least one number";
}
/*
Additional checks you can accomplish as homework
- Make sure there is at least one lowercase letter
- Make sure there is at least one uppercase letter
- Make sure there is at least one symbol character
*/
return $response;
}
}
?>
demo.php(file that calls the strongpass class into action)
<?php
$password = "";
$status = "";
if(isset($_POST["password"])){
$password = $_POST["password"];
include_once("strongpass.php");
$strongpass = new strongpass();
$response = $strongpass->check($password);
if($response != "OK"){
$status = $response;
} else {
$status = "Password is strong so parsing can continue here.";
}
}
?>
<h2>Class strongpass Demo</h2>
<form action="demo.php" method="post">
<input name="password" type="password" value="<?php echo $password; ?>">
<input type="submit" value="Check Password Strength">
</form>
<h3><?php echo $status; ?></h3>
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