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PHP Operators and Expressions

PHP Operators and Expressions
What will be the output of the following PHP code ?
$a = 12;
--$a;
echo $a++;

11
error
10
12

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$color1 = red;
$color2 = green;
echo "$color1"."$color2";

green
red green
error
red

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

Hello World
Nothing
Error
Missing semicolon error

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$i = 0;
$x = $i++;
$y = ++$i;
print $x;
print $y;

12
02
01
21

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$a = 1;
$b = 3;
$d = $a++ + ++$b;
echo $d;

3
error
4
5

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$color = red;
echo "$color" . red ;

red red
red
nothing
error

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