Basic PHP: The Full Language Introduction 2

Ello, ello, ello ...

How are you ?

Did you manage to make that Lobola money? Oh Lobola is a South African tradition, where a man pays/gives gifts/monies to the wife's family. It's so much fun.

"Alright, Okay ..." - Denzel Washington

Alright take a breather Khomotso, let it sink in a bit and come back :)

"Alright, alright, alright ..." - Kevin Hart's Dad

PHP has three main variable scopes:

PHP Functions

Once again, a function is a block of statements that can be used repeatedly in a program. A PHP function is defined as shown below

<?php
    function nameFunction() {
        //function code to be returned here inside
    }
?>
<?php
    function sayHello(){
        echo 'hello world1!';
    }

    //calling the function
    sayHello();

    //calling the function will print 'hello'
?> 

As usual Pedro, create a new PHP file called 'functions.php', get your ide/text editor ready, because we're about to get our code on. Alright copy and paste the code below, and let's get cracking ....

<?php

    function printText(){
        echo 'this text is from the function';
    }

    printText();
?> 
<?php

    function testArguments($name){

        echo 'your name is '.$name.'!';
    }

    // caliing function with our argument
    testArguments('Thandi');
?>
<?php

    function testArguments($name, $lastName){
        echo 'Your name is '.$name.' '.$lastName;
    }

    testArguments('Thandi', 'Swanepoel');

?>

Default values for our arguments, these are the values that will be used instead of our arguments in case they are empty. Like so ...

<?php

    function defaultArguments($name = 'default name'){
        echo 'The name value is '. $name;
    }

    defaultArguments('Sthembile');
    defaultArguments();
    defaultArguments('Danng Ma!');
?>
<?php 

    function addition($x, $y){
        $sum = $x + $y;
        return $sum;
    }

    echo addition(5, 1);
?>

"Functions are a collection of one or more php statements stored in a block, that can be called/referenced and used at multiple points of a PHP script for multiple times"

The Village Geek

"Alright, alright, alright ..." - Matthew McConaughey

Play around with the code will ya ... It'll be a good decompression for you.

Talk to you next time ...


Cape Town, South Africa

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