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