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PHP Control Structures (Loop)

PHP Control Structures (Loop)
What will be the output of the following PHP code ?
$a = 97;
switch(?$a) {
case "a":
print "hi";
break;
case 97:
print "hello";
break;
default:
print "hi1";
}

hello
hi
hihello
hihellohi1

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PHP Control Structures (Loop)
What will be the output of the following PHP code ?
if (!print "hi")
if (print "hello")
print "hi";

hi
hihi
hihellohi
no output

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PHP Control Structures (Loop)
What will be the output of the following PHP code ?
$x;
for ($x = -3; $x < -5; ++$x) {
print ++$x;
}

-3-4
-3-4-5
no output
infinite loop

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PHP Control Structures (Loop)
What will be the output of the following PHP code ?
$x = 10;
$y = 20;
if ($x > $y && 1||1)
print "hi";
else
print "how are u";

how are u
no output
hi
error

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PHP Control Structures (Loop)
What will be the output of the following PHP code ?
$a = "hello";
if (strlen($a))
print strlen($a);
else
print "hi";

hellolength
5
hi
error

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PHP Control Structures (Loop)
What will be the output of the following PHP code ?
$user = array("Ashley", "Bale", "Shrek", "Blank");
for ($x = 0; $x < count($user); $x++) {
if ($user[$x] == "Shrek")
continue;
printf ($user[$x]);
}

AshleyBaleShrek
No output
AshleyBale
AshleyBaleBlank

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