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