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 $sum; } echo addValues(1,2,3);
The function print_r () returns details on
What will be the output of the following PHP code?
<?php function calc($price, $tax="") { $total = $price + ($price * $tax); echo "$total"; } calc(42); ?>
Which of the following PHP functions can be used to get the current memory usage?
function func ($x, $x=1, $x=2){ return $x; } print func (3);
Some PHP functions, like echo , do not need you to use brackets when calling them. Is this true?
<?php function 2myfunc() { echo "Hello World"; } 2myfunc(); ?>
Which type of function call is used in line 8 in the following PHP code?
<?php function calc($price, $tax) { $total = $price + $tax; } $pricetag = 15; $taxtag = 3; calc($pricetag, $taxtag); ?>
<?php function complicated($compulsory, ...$extras) { echo "I have " . func_get_args() . " arguments"; } complicated(1,2,3,4);
$x = function func ($a, $b, $c){ print "$c|$b|$a\n"; } print $x (1,2,3);
<?php echo(atan(0.50)); ?>
What will this code output?
<?php if (!is_callable(function(){echo "Hello";})) { function sayHello() { echo "World!"; } } sayHello();
What is the difference between the include and require language constructs?
include
require
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";
<?php function a() { function b() { echo 'I am b'; } echo 'I am a'; } b(); a(); ?>
<?php echo lcfirst("welcome to Bangladesh"); ?>
What would go in place of ?????? below to make this script execute without a fatal error?
$a = 1; $b = 0; /* ?????? */ $c = $a / $b;
Take a look at the following code...
<?php function myFunction($a){ $a++; } $b = 1; myFunction($b); ?>
What code do you need to replace so that $b has the value 2 at the end of the script?
If a function signature contains three parameters, for which of them may the splat operator be used?
<?php function foo($msg) { echo "$msg"; } $var1 = "foo"; $var1("will this work"); ?>
<?php $str = "Hello World"; echo wordwrap($str,5,"<br>\n"); ?>
Which one of the following PHP functions can be used to find files?
Functions that returns a new array without disturbing their old arguments might be called as
<?php declare(strict_types=1); function multiply(float $a, float $b): int { return $a * $b; } $six = multiply(2, 3); echo gettype($six); ?>
<?php function calc($num1, $num2) { $total = $num1 * $num2; } $result = calc(42, 0); echo $result; ?>
A function in PHP which starts with __ (double underscore) is known as ____
Type Hinting was introduced in which version of PHP?
Which one of the following functions can be used to compress a string?
<?php echo ucwords("i love my country"); ?>
What is the best way to ensure that a user-defined function is always passed an object as its single parameter?
(function Hello() { echo "Hello World!"; })();
What is the best way to test if $param is an anonymous function in a method?
<?php echo ord ("hi"); ?>
<?php function a() { function b() { echo 'I am b'; } echo 'I am a'; } a(); a(); ?>
<?php $op2 = "blabla"; function foo($op1) { echo $op1; echo $op2; } foo("hello"); ?>
How would you refer to the parameter with the value cat in the following function? <?php
function complicated($compulsory, ...$extras, $animal) { // I want to reference the variable with the value "cat" } complicated(1,2,3,"cat");
What will be the output of the following code -
function fn (&$var) { $var = $var - ($var/10*5); return $var; } echo fn(100);
function increment ($val){ return ++$val; } echo increment (1);
Which of the following PHP functions accepts any number of parameters?
<?php function A1($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 $x does not equal the other conditions echo 'Default was executed.'; break; } } A1(9); ?>
How to define a function in PHP?
<?php echo chr(52); ?>
When during declaring a function it is impossible to assign a default value to a parameter?
What is the output of the following function?
function &find_variable(&$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";
What would you replace ??????? with, below, to make the string Hello, World! be displayed?
function myfunction() { /* ??????? */ echo $string; } myfunction("Hello, World!");
How many functions are used by PHP to convert between arrays and variables?
Which of the following PHP functions can be used for generating unique ids?
You cannot use empty() as a callback for the usort() function.
<?php declare(strict_types=1); function multiply(float $a, float $b): float { return (double)$a * (double)$b; } $six = multiply(2, 3); echo gettype($six);
Which of the following are valid function names?
i) function() ii) €() iii) .function() iv) $function()