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PHP Operators and Expressions

PHP Operators and Expressions
What will be the output of the following PHP code ?
$i = "";
while ($i = 10) {
print "hi";
}
print "hello";

hello
error
hihello
infinite loop

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$x = 1;
$y = 2;
if (++$x == $y++) {
echo "true ", $y, $x;
}

true 33
true 23
true 22
no output

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$x = 5;
$y = 10;
$z = "$x + $y";
echo "$z";

$z
15
10 + 5
$x + $y

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

Error
Missing semicolon error
Hello World
Nothing

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

$z
8
15
1

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$var1 = 3;
print $var = ++$var;

1
3
0
2

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