DaniWeb Forum Index > Web Development > PHP

Passing in Arguments

Please support our PHP advertiser: PostgreSQL or MySQL? Compare and contrast the two most popular open source databases

•

Join Date: Jul 2007

Posts: 91

Reputation: Reliable is an unknown quantity at this point

Solved Threads: 2

Reliable

Offline

Junior Poster in Training

Passing in Arguments

Oct 8th, 2009

Good afternoon all,

I'm at the beginning stages of learning PHP. I'm trying to understand passing in functions. I have a video lesson so I can see what is being explained but for some reason i am still not getting it.

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
<?php
function hello($word)
{
echo "Hello {$word}!<br/>";
}
 
hello("Daniweb");
?>
<?php
function hello($word)
{
echo "Hello {$word}!<br/>";
}

hello("Daniweb");
?>

Can someone possibly explain it in a way that I would? This will also help me better understand ActionScript 3.0 Thanks.

•

Join Date: Apr 2005

Posts: 1,435

Reputation: ShawnCplus is a glorious beacon of light

Solved Threads: 232

ShawnCplus ShawnCplus is online now

Online

Code Monkey

Oct 8th, 2009

What exactly don't you understand? You have a function 'hello' that takes 'name' as a parameter. Any time you call hello and pass it a value, in this case Daniweb it will use that value as the value of the parameter name.

 Help with Code Tags 
 PHP Syntax (Toggle Plain Text) 
function hello($name)
{
  echo 'Hello, ' . $name;
}
hello('Daniweb');
 
// is exactly like saying
echo 'Hello, ' . 'Daniweb';
// since the value of $name becomes 'Daniweb'
function hello($name)
{
  echo 'Hello, ' . $name;
}
hello('Daniweb');

// is exactly like saying
echo 'Hello, ' . 'Daniweb';
// since the value of $name becomes 'Daniweb'

GCS d- s+ a-->? C++(++++) UL+++ P+>+++ L+++ E--- W+++
N+ o K w++(---) O? !M- V PS+>++ PE+ Y+ PGP !t- 5? X- R tv+
b+>++ DI+ D G++>+++ e+ h+>++ r y+
PMs asking for help will not be answered, post on the forums. That's what they're there for.

•

Join Date: Jul 2007

Posts: 91

Reputation: Reliable is an unknown quantity at this point

Solved Threads: 2

Reliable

Offline

Junior Poster in Training

Gotcha. Thanks!

Oct 8th, 2009

•

Originally Posted by ShawnCplus

What exactly don't you understand? You have a function 'hello' that takes 'name' as a parameter. Any time you call hello and pass it a value, in this case Daniweb it will use that value as the value of the parameter name.
Help with Code Tags

PHP Syntax (Toggle Plain Text)
function hello($name)
{
  echo 'Hello, ' . $name;
}
hello('Daniweb');
 
// is exactly like saying
echo 'Hello, ' . 'Daniweb';
// since the value of $name becomes 'Daniweb'
function hello($name) { echo 'Hello, ' . $name; } hello('Daniweb'); // is exactly like saying echo 'Hello, ' . 'Daniweb'; // since the value of $name becomes 'Daniweb'

I guess perhaps the semantics of everything was messing me up (eg.."passing in", "arguments"). It wasn't that specific example I had problems with; it was the general principal of "passign in arguments": why that needs to happen; what makes that pertinent/significant/needed. I just posted that to try and make sure people were clear what I was asking. Perhaps I failed in that. As I changed semantics in my head the bright light shone. As i rephrase "passing in arguments" with "receiving variables" and received the lesson a few more times I got it. Thanks for your time and clarity though. See you at the top.