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PHP Functions

PHP Functions
What will be the output of the following PHP code?
function sum($num1, $num2) {
$total = $num1 + $num2;
echo "cos($total)";
}
sum(5,-5);

1
-0.5
0
0.5

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PHP Functions
What will be the output of the following PHP code?
function sayHello() {
echo "HelloWorld";
}
$function_holder = "sayHello";
$function_holder();

HelloWorld
No Output
sayHello
Error

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PHP Functions
What will be the output of the following PHP code ?
function email()
{
$email = ’contact@examians.com’;
$new = strstr($email, ‘@');
echo $new;
}
email();

@examians.com
contact
contact@examians.com
examians.com

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PHP Functions
What will be the output of the following PHP code ?
function start($string)
{
if ($string < 45)
return 20;
else
return 40;
}
$t = start(90);
if ($t < 20)
{
echo "Have a good day!";
}
else
{
echo "Have a good night!";}

None of the mentioned
Have a good day!
ERROR
Have a good night!

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PHP Functions
Above usleep() function pauses PHP for .usleep(1000000);

100 microseconds
1 microseconds
1 second
10 seconds

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PHP Functions
What will happen in this function call?
function calc($price, $tax) {
$total = $price + $tax;
}
$pricetag = 15;
$taxtag = 3;
calc($pricetag, $taxtag);

Default Argument Value
Call By Value
Call By Reference
Type Hinting

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