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PHP Operators and Expressions

PHP Operators and Expressions
What will be the output of the following PHP code ?
$x = 4;
$y = 3;
$z = 1;
echo "$x = $x + $y + $z";

Error
4 = 4 + 3 + 1
8
8 = 4 + 3 +1

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PHP Operators and Expressions
What will be the output of the following PHP code ?
print_r "Hello world"

Nothing
Error
Missing semicolon error
Hello World

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PHP Operators and Expressions
What will be the output of the following PHP code ?
# echo "Hello world";
echo "# Hello world";

# Hello world
Hello world
Hello world# Hello world
Error

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PHP Operators and Expressions
What will be the output of the following PHP code ?
function fun() {
$x = 0;
echo $x;
$x++;
}
fun();
fun();
fun();

000
012
123
111

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PHP Operators and Expressions
What will be the output of the following PHP code ?
define("GREETING", "PHP is a scripting language");
echo $GREETING;

no output
GREETING
$GREETING
PHP is a scripting language

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$one = "Hello";
$two = "World";
echo "$one$two";

Error
$one$two
Hello
HelloWorld

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