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Unit 7: Multidimensional Arrays

end( ) Notes
Moves the iterator to the last element in the array and returns it
each( )
Returns the key and value of the current element as an array and moves the iterator to the next
element in the array
key( )
Returns the key of the current element
The each( ) function is used to loop over the elements of an array. It processes elements according
to their internal order:
reset($addresses);
while (list($key, $value) = each($addresses))
{

echo “$key is $value<BR>\n”;
}
Output:

0 is spam@cyberpromo.net 1 is abuse@example.com
This approach does not make a copy of the array, as foreach does. This is useful for very large
arrays when you want toconserve memory.
The iterator functions are useful when you need to consider some parts of the array separately
from others. Example shows code that builds a table, treating the first index and value in an
associative array as table column headings.
Building a table with the iterator functions

$ages = array (‘Person’ => ‘Age’,
‘Pradip’ => 35, ‘Barney’ => 30,
‘Tigger’ => 8, ‘Pooh’ => 40);

// start table and print heading reset ($ages);
list($c1, $c2) = each($ages);
echo(“<table><tr><th>$c1</th><th>$c2</th></tr>\n”);

// print the rest of the values
while (list($c1,$c2) = each($ages)) {
echo(“<tr><td>$c1</td><td>$c2</td></tr>\n”);
} // end the table
echo (“</table>”);

<table>
<tr><th>Person</th><th>Age</th></tr>
<tr><td>Pradip</td><td>35</td></tr>
<tr><td>Barney</td><td>30</td></tr>

<tr><td>Tigger</td><td>8</td></tr>

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