Liste med forskjellige farger annenhver gang

[Gilbert]

txt-dokument med informasjon:

 

bnm1||tff

bnm2||turr

bnm3||turi

bnm4||turd

 

$fil = file('info/ordliste.php'); 



foreach($fil as $e => $p){ 

list($ord,$forklaring) = explode("||", $p); 

echo "<tr><td [b]bgcolor=ffffff[/b]><b><a name="$ord"><li> 8$ord</b></a><br>$forklaring</td></tr>"; 

}

 

Ønsker at scripet skal gjøre annenhver bgcolor til en annen farge. slik at bnm1 og bnm3 blir med f.eks. #129855

 

 

Sikker på at dette er mulig ;-)

[Valagar]

Før loopen setter du:

 

$i = 0;

 

Deretter bytter du ut <td>en med:

 

<td style="background: " . (($i++ % 2 == 0) ? "#FFFFFF" : "#CCCCCC") . "">

 

Har ikke testet, men tror koden skal virke.

[magikern]

quoter litt fra et annet forum:

I've seen some people ask this before, so I thought I'd write a short tutorial. How do you alternate row colors using PHP?

 

It's simple really, wherever you data is, whether it's in an array, database, or file, just loop through it and print this line:

 

<tr bgcolor="<?=($i%2)?"#ffffff":"#c0c0c0";?>">

<td>YOUR DATA GOES HERE</td>

</tr> 

 

The % is just the remainder if the top number (numerator) was divded by the bottom number (denominator).

To further explain this.... it may be easier to read through examples...

 

Example 1: Data in an array

 

<table>

<?

    $myarray = array('apples', 'oranges', 'banana');

    $i = 0;

    foreach($myarray as $value)

    {

?>

<tr bgcolor="<?=($i%2)?"#ffffff":"#c0c0c0";?>"><td><?= $value ?></td></tr>      

<?

        $i++;

    }

?>

</table>

 

This should look like this:

 

Example 2: Data in a Database

$sql = "SELECT * FROM fruit";

$results = mysql_query($sql);



$i = 0;

while($the_fruits = mysql_fetch_row($results))

{

?>

<tr bgcolor="<?=($i%2)?"#ffffff":"#c0c0c0";?>"><td><?= $the_fruits["fruit"] ?></td></tr>      

<?

    $i++;

}

 

Example 3: Data in a file

Say myfile.txt contains:

1,apple

2,orange

3,banana

 

The code would look like this:

$filename = 'myfile.txt';



// Read file contents

$fileptr = @fopen($filename, 'r');



while (!feof($fileptr)) 

 $temp .= fread($fileptr, 4096);



$source = explode("n", $temp);



$i = 0;

foreach($source as $data)

{

 list($rownum,$fruit) = explode(",",$data);



 if($i%2)

    $rowcolor = '#ffffff';

 else 

    $rowcolor = '#c0c0c0';

  

 echo '<tr bgcolor="'. $rowcolor.'"><td align="right" width="100">'. $rownum .'</td><td width="100">'. $fruit .'</td></tr>';

 $i++;

}



echo '</table>';

 

<?=($i%2)?"#ffffff":"#c0c0c0";?>

 

is the shorthand 'if' conditional statement.

 

It means the same thing as:

 

<?



if($i%2)

   echo "#ffffff";

else

   echo "#c0c0c0";



?>

 

you can also use $i & 1, which does a binary check on the number. if the last bit is 1, then it's odd. if not, it's even

 

example (decimal to binary):

 

1 => 1

2 => 10

3 => 11

4 => 100

5 => 101

 

etc I think it's a little faster too.

 

<table>

<?

   $myarray = array('apples', 'oranges', 'banana');

   $i = 0;

   foreach($myarray as $value)

   {

?>

<tr bgcolor="<?=($i&1)?"#ffffff":"#c0c0c0";?>"><td><?= $value ?></td></tr>      

<?

       $i++;

   }

?>

</table>

 

and yet another way:

 

<?php

echo("<table>");

$num = 10;

for($i = 0; $i < $num; $i++) {



  if(round($i/2) == $i/2) { 

     echo "<tr bgcolor="#cccccc">";

     }

  else { echo "<tr bgcolor="#eeeeee">"; }

  echo "<td>$i</td></tr>";

}

echo("</table>");

?>

 

 

 

det skulle være en god del forskjellige måter å gjøre dette på...