PHP Programing task 4

// array functions
// 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);
?>
**********
**********
**********
**********
// variable handling functions
//1
<?php

$a = "5";

$result = (boolval($a) ? 'true' : 'false' );

echo "$result <br>";

$b = "";
$test = (boolval($b) ? 'true' : 'false');
echo "$test <br>";


?>

//2
<?php

$a = "123.456";
echo doubleval($a)."<br>";

$b = "123.456asgfgsda";
echo doubleval($b)."<br>";

$c = "vbfg123.456";
echo doubleval($c)."<br>";

$d = "987vbfg123.456";
echo doubleval($d)."<br>";

?>

//3
<?php

$a = "";

echo empty($a)."<br>";

$b = "2";

echo isset($b);

?>

//4
<?php


$a = "1234.56789";
echo floatval($a) . "<br>";

$b = "1234.56789Hello";
echo floatval($b) . "<br>";

$c = "Hello1234.56789";
echo floatval($c) . "<br>";

?>

//5
<?php

$a = 3;
echo gettype($a) . "<br>";

$b = 3.2;
echo gettype($b) . "<br>";

$c = "Hello";
echo gettype($c) . "<br>";

$d = array();
echo gettype($d) . "<br>";

$e = array("red", "green", "blue");
echo gettype($e) . "<br>";

$f = NULL;
echo gettype($f) . "<br>";

$g = false;
echo gettype($g) . "<br>";

// $data = array(1, 1., NULL, new stdClass, 'foo');

// foreach ($data as $value) {
//     echo gettype($value), "<br>";
// }

?>

//6
<?php
$a = 32;
echo intval($a) . "<br>";

$b = 3.2;
echo intval($b) . "<br>";

$c = "32.5";
echo intval($c) . "<br>";

$d = array();
echo intval($d) . "<br>";

$e = array("red", "green", "blue");
echo intval($e) . "<br>";
?>

//7
<?php
$a = "Hello";
echo "a is " . is_array($a) . "<br>";

$b = array("red", "green", "blue");
echo "b is " . is_array($b) . "<br>";

$c = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
echo "c is " . is_array($c) . "<br>";

$d = "red, green, blue";
echo "d is " . is_array($d) . "<br>";

$e = array();
echo "e is " . is_array($e) . "<br>";
?>


//8
<?php
$a = 1;
echo "a is " . is_bool($a) . "<br>";

$b = 0;
echo "b is " . is_bool($b) . "<br>";

$c = true;
echo "c is " . is_bool($c) . "<br>";

$d = false;
echo "d is " . is_bool($d) . "<br>";
?>

//9
<?php
// $a = 32;
// echo "a is " . is_float($a) . "<br>";

// $b = 0;
// echo "b is " . is_float($b) . "<br>";

// $c = 32.5;
// echo "c is " . is_float($c) . "<br>";

// $d = "32";
// echo "d is " . is_float($d) . "<br>";

// $e = true;
// echo "e is " . is_float($e) . "<br>";

// $f = "null";
// echo "f is " . is_float($f) . "<br>";

// $g = 1.e3;
// echo "g is " . is_float($g) . "<br>";

var_dump(is_float(27.25));
var_dump(is_float('abc'));
var_dump(is_float(23));
var_dump(is_float(23.5));
var_dump(is_float(1e7));
var_dump(is_float(true));

?>

// 10

<?php

$a = 0;
echo "a is " . is_null($a) . "<br>";

$b = null;
echo "b is " . is_null($b) . "<br>";

$c = "null";
echo "c is " . is_null($c) . "<br>";

$d = NULL;
echo "d is " . is_null($d) . "<br>";

?>
**********
**********
**********
**********
// 1
<?php
$str = addcslashes("Hello World!","W");
echo($str);
?>

//2
<?php
$str = addslashes('What does "yolo" mean?');
echo($str);
?>

//3
<?php
$str = bin2hex("Hello World!");
echo($str);
?>

//4
<?php
$str = "Hello World!";
echo $str . "<br>";
echo chop($str,"World!");
?>

//5
<?php
echo chr(52) . "<br>"; // Decimal value
echo chr(052) . "<br>"; // Octal value
echo chr(0x52) . "<br>"; // Hex value
?>

//6
<?php
$str = "Hello world!";
echo chunk_split($str,1,".");
?>

//7
<?php
$str = "Hello world! æøå";
echo $str . "<br>";
echo convert_cyr_string($str,'w','a');
?>

//8
<?php
$str = ",2&5L;&\@=V]R;&0A `";
echo convert_uudecode($str);
?>

// 9
<?php
$str = "Hello world!";
echo convert_uuencode($str);
?>

//10
<?php
$str = "Hello World!";
echo count_chars($str,3);
?>