Functions

Functions WebDev/*nix assorted functions & hacks

snippets .htaccess / mod_rewrite 404 header Ajax response page Basic HTTP Auth Column display sans near-empty columns JavaScript favelets/bookmarklets misc php stuffs php tricks 8 found

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Category: snippets
Body:

<?php
/**
 * When you list .. anything, and want to display the list in columns, it's easiest to do (simplified):
 *    $per_col = ceil($total/$columns);
 *    foreach($list as $item) { 
 *      echo $item."\n";
 *      if ($i++ % $per_col == 0) {
 *        // start a new column
 *      }
 *    }
 * 
 * But that sometimes leaves the last column near-empty; say, 14 items over 4 columns:
 *  1   5   9  13
 *  2   6  10  14
 *  3   7  11
 *  4   8  12
 * 
 * It gets worse with larger lists, obviously.
 * Sometimes it's nicer (if they're big web buttons, say) to show them like this:
 * 
 *  1   5   9  12
 *  2   6  10  13
 *  3   7  11  14
 *  4   8
 * 
 * Below are 2 similar solutions that do this, not sure which one I like better yet..
 * 
**/
?>
<html>
<head>
  <meta http-equiv="Content-type" content="text/html; charset=utf-8">
  <title>WordList</title>
  <style type="text/css" media="screen">
    table {
      float: left;
      padding-right: 20px;
      border: 1px solid navy;
    }
    td {
      border: 1px solid gray;
    }
  </style>
</head>
<body>

<?php

// input & settings
$words = explode(' ', 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor'.
   ' incididunt ut. labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation'.
   ' ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in'.
   ' voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint cupidatat non proident,'.
   ' sunt culpa qui officia deserunt mollit anim id est laborum.');
$total   = count($words);
$columns = 7;

// oft-used values
$xl_columns = $total % $columns;                // number of columns which will have an extra row
$per_col    = floor($total / $columns);         // number of rows per column

echo "Total <strong>$total</strong>, xl_columns <strong>$xl_columns</strong>, per_col <strong>$per_col</strong><br>";

/**
 * The first one most resembles the classical solution: loop through all items and insert </col><col> when 
 * appropriate. $count % $per_col [+1] doesn't work as well, since mod $per_col doesn't "work" after some
 * columns which were $per_col+1 - the count will be off. So you'd have to re-start from zero after the larger
 * columns, and then you might as well just reset to zero everytime, and == to the $per_col[+1] instead of %==0.
**/

$count = 0;
echo '<table>';
foreach($words as $i => $word) {
  $count++;
  echo "<tr><td>$word</td></tr>";
  if ($i == count($words)-1) break;
  if ($count == (($xl_columns > 0) ? $per_col+1 : $per_col)) {
    echo "</table>\n<table>\n";
    $xl_columns--;
    $count = 0;
  }
}
echo 
 "</table>
  <div style='clear: both;'></div>\n";
$xl_columns = $total % $columns; // reset this for second example..

/**
 * This one's shorter but uses 2 nested for-loops, which you may or may not like.
 * Not sure myself yet :-) It does have 2 less if-statements, and any table headers will only need to appear once
 * (though that could be a string var, too).
**/

$w = 0;
for ($i=0; $i < $columns; $i++) { 
  echo "<table>\n";
  for ($j=0; $j < (($xl_columns > 0) ? $per_col+1 : $per_col); $j++) {
    echo "<tr><td>".$words[$w++]."</td></tr>";
  }
  echo "</table>\n";
  $xl_columns--;
}

</body>
</html>

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snippets .htaccess / mod_rewrite 404 header Ajax response page Basic HTTP Auth Column display sans near-empty columns JavaScript favelets/bookmarklets misc php stuffs php tricks 8 found auth	Name: Category: snippets Body: <?php /** * When you list .. anything, and want to display the list in columns, it's easiest to do (simplified): * $per_col = ceil($total/$columns); * foreach($list as $item) { * echo $item."\n"; * if ($i++ % $per_col == 0) { * // start a new column * } * } * * But that sometimes leaves the last column near-empty; say, 14 items over 4 columns: * 1 5 9 13 * 2 6 10 14 * 3 7 11 * 4 8 12 * * It gets worse with larger lists, obviously. * Sometimes it's nicer (if they're big web buttons, say) to show them like this: * * 1 5 9 12 * 2 6 10 13 * 3 7 11 14 * 4 8 * * Below are 2 similar solutions that do this, not sure which one I like better yet.. * / ?> <html> <head> <meta http-equiv="Content-type" content="text/html; charset=utf-8"> <title>WordList</title> <style type="text/css" media="screen"> table { float: left; padding-right: 20px; border: 1px solid navy; } td { border: 1px solid gray; } </style> </head> <body> <?php // input & settings $words = explode(' ', 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor'. ' incididunt ut. labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation'. ' ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in'. ' voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint cupidatat non proident,'. ' sunt culpa qui officia deserunt mollit anim id est laborum.'); $total = count($words); $columns = 7; // oft-used values $xl_columns = $total % $columns; // number of columns which will have an extra row $per_col = floor($total / $columns); // number of rows per column echo "Total <strong>$total</strong>, xl_columns <strong>$xl_columns</strong>, per_col <strong>$per_col</strong><br>"; / * The first one most resembles the classical solution: loop through all items and insert </col><col> when * appropriate. $count % $per_col [+1] doesn't work as well, since mod $per_col doesn't "work" after some * columns which were $per_col+1 - the count will be off. So you'd have to re-start from zero after the larger * columns, and then you might as well just reset to zero everytime, and == to the $per_col[+1] instead of %==0. / $count = 0; echo '<table>'; foreach($words as $i => $word) { $count++; echo "<tr><td>$word</td></tr>"; if ($i == count($words)-1) break; if ($count == (($xl_columns > 0) ? $per_col+1 : $per_col)) { echo "</table>\n<table>\n"; $xl_columns--; $count = 0; } } echo "</table> <div style='clear: both;'></div>\n"; $xl_columns = $total % $columns; // reset this for second example.. / * This one's shorter but uses 2 nested for-loops, which you may or may not like. * Not sure myself yet :-) It does have 2 less if-statements, and any table headers will only need to appear once * (though that could be a string var, too). **/ $w = 0; for ($i=0; $i < $columns; $i++) { echo "<table>\n"; for ($j=0; $j < (($xl_columns > 0) ? $per_col+1 : $per_col); $j++) { echo "<tr><td>".$words[$w++]."</td></tr>"; } echo "</table>\n"; $xl_columns--; } ?> </body> </html>
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