In the subsequent PHP script (after t he form was submitted), $hobbies would be a string array (thus the []) and its values would be the values (as specified on the individual input tags) that the user had selected on the form.

cool ok got another question if i use this bit of code first of all is this teling it to turn the string $ints into this array interests my qUESTION IS WHAT DOES THE (',', THAT DO IN THIS BIT CODE


}$ints = implode (',', $_POST['interests']);


also this code here what does the <pre> tag do and also where is say echo "$key\t$value\n"; why is there a t before $value


<?php
# script 2.13 - sorting.php

//create the array.
$movies=array('10' =>'cosablanca',
'9.65' => 'to kill a mockingbird',
'2.35' => ' the english patient',
'8' => ' traffic');

//display the movies in their original order:
echo 'in there original order:
<br /><pre> Rating Title ';
foreach ($movies as $key => $value){

echo "$key\t$value\n";
}
echo '</pre>';

//display the movies sorted by title:
echo 'sorted by title:<br /><pre>Rating title:';
asort ($movies);
foreach ($movies as $key => $value){
echo "$key\t$value\n";
}
echo '</pre>';

//display the movies sorted by rating:
echo 'sorted by rating:<br /><pre>Rating title';
krsort($movies);
foreach ($movies as $key => $value){
echo "$key\t$value\n";
}
echo '</pre>';

?>

That code creates a comma-separated string of values combining all the values in the array $_POST[interests].

implode() takes a delimiter and an array. It concatenates all the values of the array separated by the delimiter string between each. See http://www.php.net/implode

ok what about the <pre> tag do and also where is say echo "$key\t$value\n"; why is there a t before $value is this part of the implode

The <pre> tag is an HTML tag -- preformatted text. It has nothing to do with the PHP script. See http://www.w3schools.com/tags/tag_pre.asp.

The \t is how you specify a tab character to be printed.

chears kyrnt