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PHP Operators and Expressions

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

2
1
3
no output

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$a = 10;
echo ++$a;
echo $a++;
echo $a;
echo ++$a;

11121213
11111212
11111112
11111213

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PHP Operators and Expressions
The result of below two statements will be:Round(2.5)Round(-2.5)

3.5, -3.5
2, -2
2.5, -2
3, -3

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$x =4;
$y = 3;
function fun($x, $y) {
$z = $x + $y / $y + $x;
echo "$z";
}
echo $x;
echo $y;
echo $z;
fun(3, 4);

437
349
347
439

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$var1 = 1 + ++5;
echo $var1;

error
7
6
no output

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PHP Operators and Expressions
What will be the output of the following PHP code ?
define("VAR_NAME","test");
${VAR_NAME} = "value";
echo VAR_NAME;
echo ${VAR_NAME};

testvalue
test
testtest
error, constant value cannot be changed

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