Total PHP Newbie seeking help

[nikifi]

Hello Folks,

I am brand new to php and is reading PHP 6/MySQL Programming for the Absolute Beginner in an attempt to teach myself php. I have a question about a basic problem that I somehow cant figure out. I dont understand why the following code prints nothing (blank page). Any help/explanation will be greatly appreciated. Thanks

 

<?php

$card = array();

 

for ($i= 1; $i <= 52; $i++)

{

 

$card = rand(1,52);

 

print "$card[1]<br />";

print "$card[2]<br />";

print "$card[3]<br />";

print "$card[4]<br />";

print "$card[5]<br />";

 

 

 

}

 

 

?>

[Alex]

$card = rand(1,52);

rand returns a random number, this just makes $card a variable that holds a number 1-52, so the elements $card[1], $card[2], etc.. don't exist.

[nikifi]

Thanks for your responce, but I mistyped. My code really looks like this:

 

<?php

$card = array();

 

for ($i= 1; $i <= 52; $i++)

{

 

$card = rand(1,52);

 

print "$card[1]<br />";

print "$card[2]<br />";

print "$card[3]<br />";

print "$card[4]<br />";

print "$card[5]<br />";

 

 

 

}

 

 

?>

 

now its not $card is set to rand() its card...Doesn't that make a difference? Thanks!

[sawade]

Both snips of code look the same...

 

Please use code tags.      Thanks.

[nikifi]

Sorry about that...Here is the code:

 

<?php
$card = array();

for ($i= 1; $i <= 52; $i++)
{

$card[i] = rand(1,52);

print "$card[1]<br />";
print "$card[2]<br />";
print "$card[3]<br />";
print "$card[4]<br />";
print "$card[5]<br />";
		  

}


?>

[Deoctor]

<?php
$card = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18);

for ($i= 1; $i <= 18; $i++)
{
   
   $card[i] = rand(1,18);
   
print "$card[1]<br />";
print "$card[2]<br />";
print "$card[3]<br />";
print "$card[4]<br />";
print "$card[5]<br />";
           

}
    

?>

 

try this

it should print a number between 1 -18

 

it will print u 2-6

but i dont got it why u are wriitng this..

do u want to pick a random number from the array??

[Deoctor]

if u want to do so

u can use this code instead

 

<?php
$card = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18);

$i= rand(1,18);
echo "$card[$i]";
echo "<p>Hello</p>";


?>

[nikifi]

Thanks for your reply. See, the problem is I am trying to teach myself to generate arrays that do not require me to define each of them, such as in the case if I had a 10,000 array. So, I was trying to use a for loop to do that. In this case I really want to generate 5 random cards but first I am using text then if I get that right I can show the card images. So, I was trying to create an array with 52 slots, then I want to pick a random 5. I know I can assign the values 1 - 52 but I know this wouldn't be practical for very large amounts, so I am trying to use a loop to do the trick. However the trick isn't working :-)

[Deoctor]

is the below code not working??

 

[nikifi]

Here is the revisd ode that does exactly what I wanted:

 

<?php


$card = array();

for ($i= 1; $i <= 5; $i++)
{
   
   $card[i] = rand(1,52);
   
   
   
print "$card[i]<br />";

   

}
    


?>

 

Thanks again!

[Deoctor]

dear nikifi

The below code will result in picking up 5 random numbers from 1-52 and display it off one by one..

till the count becomes five..

 

[mrMarcus]

Here is the revisd ode that does exactly what I wanted:

 

<?php


$card = array();

for ($i= 1; $i <= 5; $i++)
{
   
   $card[i] = rand(1,52);
   
   
   
print "$card[i]<br />";

   

}
    


?>

 

Thanks again!

 

i'm thinking you meant to have:

 

$card[$i] = rand(1,52);

 

and not:

 

$card[i] = rand(1,52);

 

as the latter of the two is just creating an index of i, and not actually setting the index of the array as the incremental number that is being stored in $i.

 

you can accomplish this without an array since you're not really doing it right anyways:

 

<?php
for ($i=1; $i<=5; $i++)
{ echo rand(1,52).'<br />'; }
?>

 

does the exact same thing.  no need to mess with arrays in this case.