PRODUCES an ARRAY through the repetition of the same ELEMENT, with INDEXATION specified by means of the ELEMENTS of another ARRAY.
<?php
arr array_fill_keys ( arr $keys , mix $value )
where,
$keys = The ARRAY of values to be used as keys
$value = The value to be used for filling
?>
EXERCISE
<?php
$keys01 = [ "ELEVEN", "12", 13 ];
$vals01 = [ 11, 12, 13 ];
echo 'The given $keys01:<br>';
echo '<pre>';
var_dump($keys01);
echo '</pre><br>';
echo 'The given $vals01:<br>';
echo '<pre>';
var_dump($vals01);
echo '</pre><br>';
echo 'After array_fill_keys ($keys01, $vals01):<br>';
$arrkfld01 = array_fill_keys ($keys01, $vals01);
echo '<pre>';
var_dump($arrkfld01);
echo '</pre>';
?>
EXERCISE
<?php
$keys02 = [ "ELEVEN", "TWELVE"];
$vals02 = [ 11, 'twelve', 13, 'fourteen' ];
echo 'The given $keys02:<br><pre>';
var_dump($keys02);
echo '<br></pre>The given $vals02:<br><pre>';
var_dump($vals02);
echo '</pre><br>After array_fill_keys ($keys02, $vals02):<br><pre>';
$arrkfld02 = array_fill_keys ($keys02, $vals02);
var_dump($arrkfld02);
echo '</pre>';
?>
EXERCISE
<?php
$keys03 = [ "ELEVEN", "TWELVE", "THIRTEEN"];
$vals03 = [ 11, 12 ];
echo 'The given $keys03:<br><pre>';
var_dump($keys03);
echo '<br></pre>The given $vals03:<br><pre>';
var_dump($vals03);
echo '</pre><br>After array_fill_keys ($keys03, $vals03):<br><pre>';
$arrkfld03 = array_fill_keys ($keys03, $vals03);
var_dump($arrkfld03);
echo '</pre>';
?>
EXERCISE
<?php
$keys04 = [ "ELEVEN", "TWELVE", "THIRTEEN"];
$vals04 = 'THIRTY-TWO';
echo 'The given $keys04:<br><pre>';
var_dump($keys04);
echo '<br></pre>The given $vals04:<br><pre>';
var_dump($vals04);
echo '</pre><br>After array_fill_keys ($keys04, $vals04):<br><pre>';
$arrkfld04 = array_fill_keys ($keys04, $vals04);
var_dump($arrkfld04);
echo '</pre>';
?>
EXERCISE
<?php
$keys05 = [ "ELEVEN", "TWELVE", "THIRTEEN"];
$vals05 = NULL;
echo 'The given $keys05:<br><pre>';
var_dump($keys05);
echo '<br></pre>The given $vals05:<br><pre>';
var_dump($vals05);
echo '</pre><br>After array_fill_keys ($keys05, $vals05):<br><pre>';
$arrkfld05 = array_fill_keys ($keys05, $vals05);
var_dump($arrkfld05);
echo '</pre>';
?>
EXERCISE
<?php
$keys06 = [ "ELEVEN", "TWELVE", "THIRTEEN"];
$rnd06 = mt_rand(0, 6);
if($rnd06 == 0)
{
$vals06 = false;
}
elseif($rnd06 == 1)
{
$vals06 = true;
}
elseif($rnd06 == 2)
{
$vals06 = ''; // EMPTY
}
elseif($rnd06 == 3)
{
$vals06 = ' '; // SPACE
}
elseif($rnd06 == 4)
{
$vals06 = ""; // EMPTY
}
elseif($rnd06 == 5)
{
$vals06 = " "; // SPACE
}
else
{
$vals06 = 4;
}
echo 'The given $keys06:<br><pre>';
var_dump($keys06);
echo '<br></pre>The given $vals06:<br><pre>';
var_dump($vals06);
echo '</pre>';
echo 'Random Number: ' . $rnd06 . '<br><br>';
echo '<br>After array_fill_keys ($keys06, $vals06):<br><pre>';
$arrkfld06 = array_fill_keys ($keys06, $vals06);
var_dump($arrkfld06);
echo '</pre>';
?>
EXERCISE
<?php
$keys07 = [];
$vals07 = [ 105, 106, '107'];
echo 'The given $keys07:<br><pre>';
var_dump($keys07);
echo '<br></pre>The given $vals07:<br><pre>';
var_dump($vals07);
echo '</pre><br>After array_fill_keys ($keys07, $vals07):<br><pre>';
$arrkfld07 = array_fill_keys ($keys07, $vals07);
var_dump($arrkfld07);
echo '</pre>';
?>
EXERCISE
<?php
$keys08 = [];
$vals08 = [];
echo 'The given $keys08:<br><pre>';
var_dump($keys08);
echo '<br></pre>The given $vals08:<br><pre>';
var_dump($vals08);
echo '</pre><br>After array_fill_keys ($keys08, $vals08):<br><pre>';
$arrkfld08 = array_fill_keys ($keys08, $vals08);
var_dump($arrkfld08);
echo '</pre>';
?>
EXERCISE
<?php
var_dump(array_fill_keys(array(), 1));
echo '<br><br>';
var_dump(array_fill_keys(array('foo', 'bar'), NULL));
echo '<br><br>';
var_dump(array_fill_keys(array('5', 'foo', 10, 1.23), 123));
echo '<br><br>';
var_dump(array_fill_keys(array('test', TRUE, 10, 100), ''));
?>
EXERCISE
<?php
/* Testing with unexpected argument types */
echo "Testing array_fill_keys() : parameter variations.<br><br>";
$fp = fopen(__FILE__, "r");
$array = array("one", "two");
echo "With unusual second arguments:<br>";
var_dump( array_fill_keys($array, $fp) );
fclose($fp);
?>