PHP Programing task 2

// 1
<?php

$array = array("one" => "Yousuf", "two" => "Hossain", "three" => "Shohag");

echo "<pre>";
print_r(array_change_key_case($array,CASE_UPPER));

?>

// 2
<?php

$array = array("apple", "orange", "banana", "tomato", "mango", "pine");

echo "<pre>";
print_r(array_chunk($array, 3,true));

?>

// 3
<?php

$array = array(

            array(
                "id" => "101",
                "first_name" => "Yousuf",
                "last_name" => "Hossain"
            ),

            array(
                "id" => "102",
                "first_name" => "Shohag",
                "last_name" => "Islam"
            ),

            array(
                "id" => "103",
                "first_name" => "Eyachin",
                "last_name" => "Ali"
            )


        );

$result = array_column($array, "first_name");

echo "<pre>";
print_r($result);

?>

// 4
<?php

$array1 = array("green", "yellow", "red");
$array2 = array("Apple", "orange", "banana");

$result = array_combine($array1, $array2);

echo "<pre>";
print_r($result);

?>

// 5
<?php

$array = array("Eyachin", "Ali", "world", "emran", "Ali", "world");

echo "<pre>";
print_r(array_count_values($array));

?>

// 6
<?php
$array1 = array("a" => "green", "red", "blue", "red", "black");
$array2 = array("b" => "green", "yellow", "red");

$result = array_diff($array1, $array2);

echo "<pre>";
print_r($result);
?>

// 7
<?php

$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "green", "yellow", "red");

$result = array_diff_assoc($array1, $array2);

echo "<pre>";
print_r($result);
?>

// 8
<?php
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4, 'black' => 5);
$array2 = array('green' => 5, 'yellow' => 7, 'cyan' => 8);

$result = array_diff_key($array1, $array2);

echo "<pre>";
print_r($result);
?>

// 9

<?php
$a = array_fill(5, 6, 'BMW');
$b = array_fill(-2, 4, 'TOYOTA');

echo"<pre>";
print_r($a);

echo"<pre>";
print_r($b);
?>
// 10
<?php
$keys = array('yellow', 5, 10, 'bar');

$result = array_fill_keys($keys, 'BMW');

echo "<pre>";
print_r($result);
?>

// 11
<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");

$result=array_flip($a1);
echo "<pre>";
print_r($result);
?>

//12
<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");

$result=array_intersect($a1,$a2);

echo "<pre>";
print_r($result);
?>

// 13
<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "green", "b" => "brown", "blue", "red", "yellow");

$result = array_intersect_assoc($array1, $array2);

echo "<pre>";
print_r($result);
?>

// 14
<?php
$array1 = array('blue'  => 1, 'red'  => 2, 'green'  => 3, 'purple' => 4, 'yellow' => 5);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan'   => 8);

$result = array_intersect_key($array1, $array2);

echo "<pre>";
print_r($result);
?>

// 15
<?php
$array = ['y' => 1, 'b' => 2, 'c' => 3];

$result = array_key_first($array);

echo "<pre>";
print_r($result);

?>