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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";

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

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$a = '12345';
echo 'qwe{$a}rty';

error
qwe12345rty
no output
qwe{$a}rty

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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;

$GREETING
no output
GREETING
PHP is a scripting language

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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};

testtest
test
error, constant value cannot be changed
testvalue

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

012
Error
111
123

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

no output
1
0
2

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