Some PHP functions, like echo , do not need you to use brackets when calling them. Is this true?

Which one of the following functions can be used to compress a string?

What will be the output of the following PHP code?

  <?php
      echo(atan(0.50));
  ?>

Which of the following are valid function names?

i) function()
ii) €()
iii) .function()
iv) $function()

What will be the output of the following PHP code?

    <?php
    echo chr(52);
    ?>

Type Hinting was introduced in which version of PHP?

What will be the output of the following PHP code?

<?php
    function A1($x)
    {
        switch($x)
        {
        case 1: 
            //this statement is the same as if($x == 1)
            echo 'Case 1 was executed.';
            break;
        case 2: 
            //this statement is the same as if($x == 2)
            echo 'Case 2 was executed.';
            break;
        case 3: 
            //this statement is the same as if($x == 3)
            echo 'Case 3 was executed.';
            break;
        case 4: 
            //this statement is the same as if($x == 4)
            echo 'Case 4 was executed.';
            break;
        default: 
            //this statement is the same as if $x does not equal the other conditions
            echo 'Default was executed.';
            break;

        }
    }
    A1(9);
?>

What is the output of the following code?

<?php
    declare(strict_types=1);
    function multiply(float $a, float $b): float {
        return (double)$a * (double)$b;
    }
    $six = multiply(2, 3);
    echo gettype($six);

What will be the output of the following PHP code?

    <?php
    echo lcfirst("welcome to Bangladesh");
    ?>

The function print_r () returns details on

What will be the output of the following PHP code?

<?php
    function calc($num1, $num2)
    {
        $total = $num1 * $num2; 
    }
    $result = calc(42, 0);
    echo $result;    
?>

What is the output of the following code (Ignoring any PHP notices and error messages)?

    $v1 = 1;
    $v2 = 2;
    $v3 = 3;
    function myFunction(){
        $GLOBALS['v1'] *= 2;
        $v2 *= 2;
        global $v3; $v3 *= 2;
    }
    myFunction();
    echo "$v1$v2$v3";

What is the output of the following code?

    $x = function func ($a, $b, $c){
        print "$c|$b|$a\n";
    }
    print $x (1,2,3);

What is the output of the following code?

    function func ($x, $x=1, $x=2){
        return $x;
    }
    print func (3);

What will be the output of the following PHP code?

    <?php
    function foo($msg)
    {
        echo "$msg";
    }
    $var1 = "foo";
    $var1("will this work");
    ?>

What is the output of the following code?

    function addValues() {
        $sum = 0;
        for ($i = 1; $i <= func_num_args(); $i++){
            $sum += func_get_arg($i);
        }
        return $sum;
    }
    echo addValues(1,2,3);

What will be the output of the following PHP code?

    <?php
    echo ord ("hi");
    ?>

What will be the output of the following PHP code?

    <?php
    function a()
    {
        function b()
        {
            echo 'I am b';
    }
        echo 'I am a';
    }
    a();
    a();
    ?>

What will be the output of the following PHP code?

    <?php
    $str = "Hello World";
    echo wordwrap($str,5,"<br>\n");    
    ?>

Which of the following PHP functions accepts any number of parameters?

What will be the output of the following code -

    function fn (&$var) { 
        $var = $var - ($var/10*5);  return $var;  
    }  
    echo fn(100);

What will be the output of the following PHP code?

    <?php
    function calc($price, $tax="")
    {
        $total = $price + ($price * $tax);
        echo "$total"; 
    }
    calc(42);   
    ?>

Which of the following PHP functions can be used for generating unique ids?

What is the output of the following code?

    function increment ($val){
        return ++$val;
    }
    echo increment (1);

What will be the output of the following PHP code?

    <?php
    $op2 = "blabla";
    function foo($op1)
    {
        echo $op1;
        echo $op2;
    }
    foo("hello");
    ?>

What is the output of the following code?

<?php
    declare(strict_types=1);
    function multiply(float $a, float $b): int {
        return $a * $b;
    }
    $six = multiply(2, 3);
    echo gettype($six);
?>

What will be the output of the following PHP code?

    <?php
    function a()  
    {
        function b()
        {
            echo 'I am b';
    }
        echo 'I am a';
    }
    b();
    a();
    ?>

What is the best way to test if $param is an anonymous function in a method?

What is the output of the following function?

    function &find_variable(&$one, &$two, &$three) {
        if ($one > 10 && $one < 20) return $one;
        if ($two > 10 && $two < 20) return $two;
        if ($three > 10 && $three < 20) return $three;
    }
    $one = 2;
    $two = 20;
    $three = 15;
    $var = &find_variable($one, $two, $three);
    $var++;
    echo "1: $one, 2: $two, 3: $three";

You cannot use empty() as a callback for the usort() function.

Take a look at the following code...

<?php
    function myFunction($a){
        $a++;
    }
    $b = 1;
    myFunction($b);
?>

What code do you need to replace so that $b has the value 2 at the end of the script?

Which of the following PHP functions can be used to get the current memory usage?

What is the output of the following code?

<?php
    function complicated($compulsory, ...$extras) {
        echo "I have " . func_get_args() . " arguments";
    }
    complicated(1,2,3,4);

What is the best way to ensure that a user-defined function is always passed an object as its single parameter?

A function in PHP which starts with __ (double underscore) is known as ____

What will this code output?

<?php
    if (!is_callable(function(){echo "Hello";})) {
        function sayHello() {
            echo "World!";
        }
    }
    sayHello();

What would go in place of ?????? below to make this script execute without a fatal error?

   $a = 1;
   $b = 0;
   /* ?????? */
   $c = $a / $b;

What would you replace ??????? with, below, to make the string Hello, World! be displayed?

                       function myfunction() {
                           /* ??????? */
                           echo $string;
                       }
                       myfunction("Hello, World!");

If a function signature contains three parameters, for which of them may the splat operator be used?

What is the difference between the include and require language constructs?

What will be the output of the following PHP code?

    <?php
    echo ucwords("i love my country");
    ?>

How to define a function in PHP?

Functions that returns a new array without disturbing their old arguments might be called as

What will be the output of the following PHP code?

<?php
    function 2myfunc()
    {
        echo "Hello World";
    }
    2myfunc();
?>

Which type of function call is used in line 8 in the following PHP code?

    <?php
    function calc($price, $tax) 
    {
        $total = $price + $tax;
    }
    $pricetag = 15;
    $taxtag = 3;
    calc($pricetag, $taxtag);   
    ?>

How many functions are used by PHP to convert between arrays and variables?

How would you refer to the parameter with the value cat in the following function? <?php

    function complicated($compulsory, ...$extras, $animal) {
        // I want to reference the variable with the value "cat"
    }
    complicated(1,2,3,"cat");

Which one of the following PHP functions can be used to find files?

When during declaring a function it is impossible to assign a default value to a parameter?

What is the output of the following code?

(function Hello() {
    echo "Hello World!";
})();