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PHP Operators and Expressions

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

Error
HelloWorld
Hello
$one$two

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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
5
error
4

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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
01
02
21

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$color1 = "red";
$color2 = "1";
echo "$color1" + "$color2";

red 1
1
0
red1

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$x = "test";
$y = "this";
$z = "also";
$x .= $y .= $z ;
echo $x;
echo $y;

error at line 4
testthisthisalso
testthis
testthisalsothisalso

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PHP Operators and Expressions
What will be the output of the following PHP code ?
$a = 10;
$b = 10;
if ($a = 5)
$b--;
print $a;
print $b--;

109
59
58
108

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