PRODUCES an ARRAY through the sequential REPEAT of the same ELEMENT.
<?php
arr array_fill ( int $start_index , int $num , mix $value )
where,
$start_index = The first index of the returned ARRAY
$num = The number of elements to insert
$value = The value to be used for filling
?>
EXERCISE
<?php
$val01fl = [ 2, 4, 16 ];
$st01ndx = 0;
$nr01val = 3;
echo 'The given $val01fl:<br><pre>';
print_r($val01fl);
echo '</pre>The start index: ' . $st01ndx . '<br><br>';
echo 'Number of $val01fl to fill: ' . $nr01val;
echo '<br><br>After array_fill($st01ndx, $nr01val, $val01fl):<br><pre>';
$arr01fld = array_fill($st01ndx, $nr01val, $val01fl);
print_r($arr01fld);
echo '</pre>';
?>
EXERCISE
<?php
$POR_locale = ['pt-pt', "pt_PT", "ptg", "portuguese"];
setlocale (LC_ALL, $POR_locale);
// Compatibility with LOCALE,
// only takes effect on PHP versions below 8.
// Test, therefore, to verify this.
$val02fl = 88.32;
$st02ndx = 2;
$nr02val = 3;
echo 'The given $val02fl:<br>';
var_dump($val02fl);
echo '<br><br>The start index: ' . $st02ndx;
echo '<br><br>Number of $val02fl to fill: ' . $nr02val;
echo '<br><br>After
array_fill(array_fill($st02ndx, $nr02val, $val02fl):<br>';
$arr02fld = array_fill($st02ndx, $nr02val, $val02fl);
echo '<pre>';
var_dump($arr02fld);
echo '</pre>';
?>
EXERCISE
<?php
$val03fl = 'ECHO';
$st03ndx = mt_rand(0, 5);
$nr03val = mt_rand(0, 7);
echo 'The given $val03fl:<br>';
var_dump($val03fl);
echo '<br><br>The start index, $st03ndx: ' . $st03ndx;
echo '<br><br>Number of $val03fl to fill: ' . $nr03val;
echo '<br><br>After
array_fill(array_fill($st03ndx, $nr03val, $val03fl):<br>';
$arr03fld = array_fill($st03ndx, $nr03val, $val03fl);
echo '<pre>';
print_r($arr03fld);
echo '</pre>';
?>
EXERCISE
<?php
$val04fl = NULL;
$st04ndx = 100;
$nr04val = 5;
echo 'The given $val04fl:<br>';
var_dump($val04fl);
echo '<br><br>The start index, $st04ndx: ' . $st04ndx;
echo '<br><br>Number of $val04fl to fill: ' . $nr04val;
echo '<br><br>After
array_fill(array_fill($st04ndx, $nr04val, $val04fl):<br>';
$arr04fld = array_fill($st04ndx, $nr04val, $val04fl);
echo '<pre>';
print_r($arr04fld);
echo '</pre>';
?>
EXERCISE
<?php
$rd05 = mt_rand(0, 1);
if($rd05 == 0)
{
$val05fl = false;
}
else
{
$val05fl = true;
}
$st05ndx = 100;
$nr05val = 5;
echo 'The given $val05fl:<br>';
var_dump($val05fl);
echo '<br><br>The start index, $st05ndx: ' . $st05ndx;
echo '<br><br>Number of $val05fl to fill: ' . $nr05val;
echo '<br><br>After
array_fill(array_fill($st05ndx, $nr05val, $val05fl):<br>';
$arr05fld = array_fill($st05ndx, $nr05val, $val05fl);
echo '<pre>';
var_dump($arr05fld);
echo '</pre>';
?>
EXERCISE
<?php
$array1 = [0.0, 1, 2.5];
$array2 = [TRUE, FALSE, NULL, "d", "e", "f"];
echo 'The given $array1:<br>';
var_dump($array1);
echo '<br><br>The given $array2:<br>';
var_dump($array2);
foreach($array1 as $start)
{
foreach($array1 as $num)
{
foreach($array2 as $value)
{
echo '<br><br>';
echo 'start: '.$start.' num: '.$num.' value: '.$value."<br>";
$output = array_fill($start, $num, $value);
var_dump($output);
}
}
}
?>
EXERCISE
<?php
echo "Testing array_fill() : basic functionality.<br>";
// calling the array_fill with all
// possible valid values for 'val' argument
$start_key = 0 ;
$num = 2;
$heredoc = <<<HERE_DOC
Hello
HERE_DOC;
// array of possible valid values
// for 'val' argument
$values = array (
/* 1 */ NULL,
0,
1,
/* 4 */ 1.5,
'hi',
"hi",
/* 7 */ $heredoc
);
$counter = 1;
for($i = 0; $i < count($values); $i ++)
{
echo "<br><br>Iteration: $counter<br>";
$val = $values[$i];
var_dump( array_fill($start_key,$num,$val) );
$counter++;
}
?>
EXERCISE
<?php
/*
* passing array_fill() as the
* 'val' argument in array_fill() function
*/
echo "Testing array_fill() : variation.<br>";
$start_key = 0;
$num = 2;
$heredoc = <<<HERE_DOC
Hello
HERE_DOC;
// array of possible valid values for 'val' argument
$values = array (
/* 1 */ NULL,
0,
1,
/* 4 */ 1.0,
'hi',
"hi",
/* 7 */ $heredoc
);
echo "<br><br>Filling 2 dimensional array
with all basic valid values:";
$counter = 1;
for($i =0; $i < count($values); $i ++)
{
echo "<br><br>Iteration: $counter<br>";
$val = $values[$i];
var_dump( array_fill($start_key,$num,
array_fill($start_key,$num,$val)) );
$counter++;
}
?>
EXERCISE
<?php
/*
* Testing array_fill() by passing
* different types of array values
* for 'val' argument
*/
echo "Testing array_fill() : usage variations.<br><br>";
// Initialise function arguments
// not being substituted
$start_key = 0;
$num = 2;
// array of different types of
// array values for 'val' argument
$values = array(
/* 1 */ array(),
array(1 , 2 , 3 , 4),
array(1 => "Hi" , 2 => "Hello"),
array("Saffron" , "White" , "Green"),
/* 5 */ array('color' => 'red' , 'item' => 'pen'),
array( 'color' => 'red' , 2 => 'green ' ),
array("colour" => "red" , "item" => "pen"),
array( TRUE => "red" , FALSE => "green" ),
array( true => "red" , FALSE => "green" ),
/* 10 */ array( 1 => "Hi" , "color" => "red" , 'item' => 'pen'),
array( NULL => "Hi", '1' => "Hello" , "1" => "Green"),
array( ""=>1, "color" => "green"),
/* 13 */ array('Saffron' , 'White' , 'Green')
);
// loop through each element of the
// values array for 'val' argument
// check the working of array_fill()
echo "With different types of array values for 'val' argument:";
$counter = 1;
for($i = 0; $i < count($values); $i++)
{
echo "<br><br>Iteration: $counter<br>";
$val = $values[$i];
var_dump( array_fill($start_key , $num , $val) );
$counter++;
}
?>