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Need help with Random Divs code

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tefflox tefflox is offline Offline
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Need help with Random Divs code

 
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  #1
Nov 9th, 2006
this code will not load on my localhost, but gives no errors. Will you load this and see if it will work:

PHP Syntax (Toggle Plain Text) 
  1. <style type="text/css">
  2. <?php
  3.  
  4. $count = 1;
  5.  
  6. function divs() {
  7.  
  8.       $int = rand(6, 30);
  9.  
  10.       while ($int <= 31) {
  11.  
  12.         $t = rand(1, 99);
  13.         $l = rand(1, 99);
  14.         $w = rand(2, 7);
  15.         $h = rand(0.25, 1.25);
  16.  
  17.         if( rand(0, 1) == 0) 
  18.             $col = "000049";
  19.         else
  20.             $col = "99ccff";
  21.  
  22.         echo ("div#d".$count." {position:absolute; top:".$t."%; left:".$l."%; width:".$w."in; height:".$h."in;");
  23.         echo ("background-color:#".$col.";}");
  24.  
  25.         $count++;
  26.     }
  27.  
  28. } 
  29.  
  30. function implement() {
  31.  
  32.     while ($count != 0) {
  33.  
  34.         echo ("<div id=\"d".$count."\"></div>");
  35.         $count--;    
  36.  
  37.     }
  38. }
  39.  
  40. ?>
  41.  
  42.     <?php
  43.         divs();
  44.     ?>
  45.  
  46.  
  47.   a:link     {color: #fff; text-decoration: none; outline: none;}
  48.   a:visited  {color: #fff; text-decoration: none; outline: none;} 
  49.   a:active   {color: #fff; text-decoration: none; outline: none;} 
  50.   a:hover    {color: #fff; text-decoration: none; outline: none;}
  51.  
  52.  
  53. </style>
  54. </head>
  55. <body>
  56.  
  57. <?php
  58.   implement();
  59. ?>
  60.  
  61. </body>
  62. </html>
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Barnz Barnz is offline Offline
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Re: Need help with Random Divs code

 
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  #2
Nov 9th, 2006
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Originally Posted by tefflox View Post
this code will not load on my localhost, but gives no errors. Will you load this and see if it will work:

PHP Syntax (Toggle Plain Text) 
  1. <style type="text/css">
  2. <?php
  3.  
  4. $count = 1;
  5.  
  6. function divs() {
  7.  
  8.       $int = rand(6, 30);
  9.  
  10.       while ($int <= 31) {
  11.  
  12.         $t = rand(1, 99);
  13.         $l = rand(1, 99);
  14.         $w = rand(2, 7);
  15.         $h = rand(0.25, 1.25);
  16.  
  17.         if( rand(0, 1) == 0) 
  18.             $col = "000049";
  19.         else
  20.             $col = "99ccff";
  21.  
  22.         echo ("div#d".$count." {position:absolute; top:".$t."%; left:".$l."%; width:".$w."in; height:".$h."in;");
  23.         echo ("background-color:#".$col.";}");
  24.  
  25.         $count++;
  26.     }
  27.  
  28. } 
  29.  
  30. function implement() {
  31.  
  32.     while ($count != 0) {
  33.  
  34.         echo ("<div id=\"d".$count."\"></div>");
  35.         $count--;    
  36.  
  37.     }
  38. }
  39.  
  40. ?>
  41.  
  42.     <?php
  43.         divs();
  44.     ?>
  45.  
  46.  
  47.   a:link     {color: #fff; text-decoration: none; outline: none;}
  48.   a:visited  {color: #fff; text-decoration: none; outline: none;} 
  49.   a:active   {color: #fff; text-decoration: none; outline: none;} 
  50.   a:hover    {color: #fff; text-decoration: none; outline: none;}
  51.  
  52.  
  53. </style>
  54. </head>
  55. <body>
  56.  
  57. <?php
  58.   implement();
  59. ?>
  60.  
  61. </body>
  62. </html>
Not tried the code, but it may be the scope of your $count variable thats the problem.

Both the $count in implement() and in divs() is not the same as the global $count variable declared above it.
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Re: Need help with Random Divs code

 
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  #3
Nov 9th, 2006
thanks so much for helping. i've been working on this hours, and earlier i had gotten it right, somehow..
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Re: Need help with Random Divs code

 
0
  #4
Nov 9th, 2006
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Originally Posted by tefflox View Post
thanks so much for helping. i've been working on this hours, and earlier i had gotten it right, somehow..
Is it working now?

You have two infinite loops, firstly the $int will always be less than 31 because you are generating a random number between 6 and 31.

And the second WHILE loop, $count will never not equal 1. Because $count is equal to nothing inside the function, look at this for example: -

PHP Syntax (Toggle Plain Text) 
  1. <?php
  2.  
  3. $count = 1;
  4.  
  5. function test()
  6. {	
  7. 	echo($count);
  8. }
  9.  
  10. test();
  11.  
  12. ?>

It outputs nothing.......

But this outputs 1: -

PHP Syntax (Toggle Plain Text) 
  1. <?php
  2.  
  3. $count = 1;
  4.  
  5. function test()
  6. {	
  7. 	global $count;
  8.  
  9. 	echo($count);
  10. }
  11.  
  12. test();
  13.  
  14. ?>

Using "global" for you should sort out the problem as demostrated by this code that outputs 2: -

PHP Syntax (Toggle Plain Text) 
  1. <?php
  2.  
  3. $count = 1;
  4.  
  5. function test()
  6. {
  7. 	global $count;
  8.  
  9. 	$count++;
  10. }
  11.  
  12. function test2()
  13. {
  14. 	global $count;
  15.  
  16. 	echo($count);
  17. }
  18.  
  19. test();
  20. test2();
  21.  
  22. ?>

However you need to sort out the first $int WHILE loop problem first.

There are a number of ways you can achieve the same thing, by either passing $count in the functions parameters, returning the new $count value from the functions, or by using the "global" syntax like as shown in the above examples.
Last edited by Barnz; Nov 9th, 2006 at 8:10 pm.
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