Techno Cards

While migrating from PHP 5.6 to PHP 7, all PHP developers are so excited to know what are the new features in PHP 7. Well, PHP 7 does not disappoint anyone, here are some of the interesting new features applied in the new version.  

This is the best feature that PHP 7 provides. While comparing to PHP 5.6 and HHVM 3.7, PHP7 is absolutely very fast in performance. It also provides high performance while using with frameworks and Content Management Systems(CMS).

Scalar type declaration allows us to declare the function parameters and return the values with required data type. The return type can be any one from integer(int), string(string), floating point number(float) and boolean(bool) types.  

Return type declaration specifies the data type of return value from a function, it is similar to argument type declaration.  

Null Coalesce operator ?? combines isset() and assignment of value, first it checks whether the variable exists or not, if it does then it takes the value, if not variable will be assigned with the second operand value. It is an interesting operator which decreases the time and long codes. 

$email =  $_GET['email']  ??  'no email';

Spaceship operator <==> is used to compare two variables, it returns three values, 

-1 (less than)

 0 (equal to)

 1 (greater than)

It works with integer, floating point number and string also. 

<?php
echo 1 <=> 1; // 0

echo 1 <=> 2; // -1

echo 2 <=> 1; // 1

?>

Constant array can be defined using define().

<?php
define('Names', [
    'Peter',
    'Harry',
    'Mary']);

echo Names[1]; // outputs "Harry"?>

The concept of anonymous class is declaring a class within another class. For detailed information about anonymous class just visit here.

It's not like what we all think about, PHP 6 already existed and it was completely different from the new release. PHP 6 is kind of failure as it takes lot of CPU time and memory since it uses UTF-16 as default encoding.

Version 6 is failure, like PHP 6 is failure; Perl 6 is failure; MySQL 6 existed but have not been released, so this might have been a consideration.

PHP 6 project and it's features were widely known, and the current release is entirely different from that, so people would definitely be confused. This is one reason why they skipped version 6.

Access value from the form 

Example Program:

<form method="POST" action="">
<input type="text" name="input_name" placeholder="Name"></br>
<input type="text" name="input_username" placeholder="Username"></br>
<input type="text" name="input_email" placeholder="Email"></br>
<input type="password" name="input_password" placeholder="Password"></br>
<input type="submit" name="submit_data" value="Submit">
</form>

<?php 
if($_SERVER['REQUEST_METHOD'] == "POST"){
//storing variables
$name = $_POST['input_name'];
$username = $_POST['input_username'];
$email = $_POST['input_email'];
$pass = $_POST['input_password'];
//Display the values
echo $name."<br>";
echo $username."<br>";
echo $email."<br>";
echo $pass."<br>";
}
?>