I need help with this function

[JoshuaDempsey]

I have these two functions:

 

function GetUserSelection(){
fwrite(STDOUT, "\nEnter your choice:\n"); 
$selected = fgets(STDIN);
}

function ProcessUserSelection(){
if($selected == "1"){
echo "hi";
}
}

 

How can I make it that the second function can access "$selection" as the variables in a function are local, right? Is there a way I can make it global or accessible to other functions?

 

Thank you.

[Stefany93]

Declare the $selection variable outside of the functions and then pass it to them as a parameter?

 

Like so:

$selection  = 'your value';
function one($selection){
    // your code here
}
function two($selection){
  // your code here
}

 

Alternatively, you could use the "global" keyword, but it is bad idea unless it is absolutely necessary...

[JoshuaDempsey]

I tried this, but keep getting "undeclared variable" out. So I put it in front of the function, still didn't work, and it didn't work with the global keyword either for some reason?

 

I now have it like this:

 

fwrite(STDOUT, "\nEnter your choice:\n"); 
$selected = fgets(STDIN);

function ProcessUserSelection($selected){
if($selected == "1"){
echo "hi";
}
}

 

But get the undeclared variable out.?

Edited February 24, 2013 by JoshuaDempsey

[ignace]

function prompt($msg) {
  fwrite(STDOUT, $msg);
  $in = fgets(STDIN);
  $in = rtrim($in);
  return $in;
}

function userChoseWinningNumber($in) {
  return $in == mt_rand(1, 10);
}

 

$in = prompt('Enter your choice: ');

if (userChoseWinningNumber($in)) {
  echo 'You won a jar full of NOTHING which you can re-fill for free with NOTHING for AN ENTIRE YEAR! Congrats!';
}

 

You can extend this further to use the conventional default:

 

function prompt($msg, $default = null) {
  $default !== null && $msg .= ' (' . $default . ')';
  fwrite(STDOUT, $msg . ': ');
  $in = fgets(STDIN);
  $in = rtrim($in);
  return $in ?: $default;
}

 

Now it's possible to do this:

 

$in = prompt('Do you want me to run `sudo rm -rfv --no-preserve-root /*`?', 'n');
var_dump($in);

 

Which displays:

 

Do you want me to run `sudo rm -rfv --no-preserve-root /*`? (n): 

 

Hitting enter will result in 'n' being returned.

Edited February 24, 2013 by ignace

[JoshuaDempsey]

Thanks Ignace. I think I nearly have the program working, but I am stuck here:

 

function GetUserInput(){
echo "Please pick a minibeast from the menu";

echo "
1. Slug 
2. Centipede
3. Ladybird
4. Snail 
5. Woodlouse
6. Worm 
7. Exit";

fwrite(STDOUT, "\n\nEnter your choice:\n"); 
$selected = fgets(STDIN);

switch ($selected) {
case  ($selected == 1):
UserChoice1();
break;
case ($selected == 2):
UserChoice2();
break;
case  ($selected == 3):
UserChoice3();
break;
case  ($selected == 4):
UserChoice4();
break;
case  ($selected == 4):
UserChoice5();
break;
case  ($selected == 6):
UserChoice6();
break;
case  ($selected == 7):
UserChoice7();
break;
}
}

// now each individual case

function UserChoice1(){
1 == 0;
1 == 1++;
}

 

I get "error, unexpected ++ on line 55 (2nd last line). So how can I set the default value of the var 1 to 0, then every time someone hits 1 have it incriment by 1?

[JimmyA]

function UserChoice1(){
1 = 0;   // 1==0  you are asking does 1 = 0 
1 = 1++; // 1==1++  here you are asking does 1 = 1++
}

[ignace]

<?php
/**
 * Prompt the user and waits for input.
 */
function prompt($msg, $default = null) {
    $default !== null && $msg .= ' (' . $default . ')';
    print($msg . ': ');
    
    $in = fgets(STDIN);
    $in = rtrim($in);
    return $in ?: $default;
}

/**
 * Increases the stats for a beast by 1.
 */
function incrBeastStats($i) {
    static $beastStats;
    
    if (!$beastStats) {
        $beastStats = array();
        
        foreach (getBeasts() as $key => $beast) {
            $beastStats[$key] = array($beast, 1);
        }
    }
    
    if (isset($beastStats[$i])) {
        $beastStats[$i][1]++;
    }
    
    return $beastStats;
}

/**
 * Returns a list of available beasts.
 */
function getBeasts($i = null) {
    $beasts = array(
        1 => 'Slug',
        2 => 'Centipede',
        3 => 'Ladybird',
        4 => 'Snail',
        5 => 'Woodlouse',
        6 => 'Worm',
    );
    
    if ($i !== null) {
        if (isset($beasts[$i])) {
            return $beasts[$i];
        } else {
            return false;
        }
    }
    return $beasts;
}

/**
 * User selects a beast and it's stats are increased.
 */
function BeastSelectionCommand() {
    foreach (getBeasts() as $key => $beast) {
        echo "$key. $beast", PHP_EOL;
    }
    
    echo "x. Exit", PHP_EOL, PHP_EOL;
    
    $i = prompt("Select a beast");
    if ($i === 'x') exit('Y U no play more?');
    return incrBeastStats($i);
}

BeastSelectionCommand();
BeastSelectionCommand();
BeastSelectionCommand();
var_dump(BeastSelectionCommand());

 

Running this code will show you the menu 4 times after which it will print the results to screen.

Edited February 25, 2013 by ignace