PHP Coding Questions and Answers - For Loops - 3

This set of PHP Multiple Choice Questions & Answers (MCQs) focuses on “For Loops – 3”.

1. What will be the output of the following PHP code?

```
<?php
```
```
for ($i = 0; 0; $i++) 
```
```
{
```
```
    print"i";
```
```
}
```
```
?>
```

a) infinite loop
b) 0
c) no output
d) error
View Answer

Answer: c
Explanation: The condition of the loop is always false 0.

2. What will be the output of the following PHP code?

```
<?php
```
```
for ($i = 0; $i < 5; $i++) 
```
```
{
```
```
    for ($j = $i; $j > 0; $i--)
```
```
        print $i;
```
```
}
```
```
?>
```

a) infinite loop
b) 0 1 2 3 4 5
c) 0 1 0 1 2 0 1 2 3 0 1 2 3 4 0 1 2 3 4 5 0 1 2 3 4 5
d) no output
View Answer

Answer: a
Explanation: In the second loop j value is not being changed.

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3. What will be the output of the following PHP code?

```
<?php
```
```
for ($i = 0; $i < 5; $i++)  
```
```
{
```
```
    for ($j = $i;$j > $i; $i--)
```
```
        print $i;
```
```
}
```
```
?>
```

a) infinite loop
b) 0 1 2 3 4 5
c) 0 1 0 1 2 0 1 2 3 0 1 2 3 4 0 1 2 3 4 5 0 1 2 3 4 5
d) no output
View Answer

Answer: d
Explanation: The second loop does not execute as the check condition is always false.

4. What will be the output of the following PHP code?

```
<?php
```

$user = array("Ashley", "Bale", "Shrek", "Blank");

```
for ($x = 0; $x < count($user); $x++) 
```
```
{
```
```
    if ($user[$x] == "Shrek") 
```
```
	    continue;
```
```
    printf ($user[$x]); 
```
```
}
```
```
?>
```

a) AshleyBaleBlank
b) AshleyBale
c) AshleyBaleShrek
d) No output
View Answer

Answer: a
Explanation: Only the Shrek is skipped due to the continue statement.

5. What will be the output of the following PHP code?

```
<?php
```

$user = array("Ashley", "Bale", "Shrek", "Blank");

    for ($x=0; $x < count($user) - 1; $x++)

```
    {
```
```
        if ($user[$x++] == "Shrek") 
```
```
		    continue;
```
```
        printf ($user[$x]); 
```
```
    }
```
```
?>
```

a) AshleyBaleBlank
b) Bale
c) AshleyShrek
d) BaleBlank
View Answer

Answer: a
Explanation: Only Bale is printed as $x++ is done before printing and then checked.

6. What will be the output of the following PHP code?

```
<?php
```

$user = array("Ashley", "Bale", "Shrek", "Blank");

```
for ($x = 0; $x < count($user); $x) 
```
```
{
```
```
    if ($user[$x++] == "Shrek") 
```
```
	    continue;
```
```
    printf ($user[$x]); 
```
```
}
```
```
?>
```

a) AshleyBaleBlank
b) BaleShrek
c) AshleyBlank
d) Bale
View Answer

Answer: b
Explanation: x is incremented only inside loop i the if condition.

7. What will be the output of the following PHP code?

```
<?php
```
```
for ($i = 0; $i % ++$i; $i++) 
```
```
{
```
```
    print"i";
```
```
}
```
```
?>
```

a) error
b) infinite loop
c) no output
d) 0
View Answer

Answer: b
Explanation: Loop condition is true as i%(i+1) is a float non zero value in php.

8. What will be the output of the following PHP code?

```
<?php
```
```
for ($i = 0; $i < 5; $i++) 
```
```
{
```
```
    for(; $i < 5; $i++)         
```
```
        print"i";
```
```
}
```
```
?>
```

a) iiiii
b) infinite loop
c) iiiiiiiiiiiiiiiiiiiiiiiii
d) no output
View Answer

Answer: a
Explanation: The i value is changed in the inner loop and reaches five, thus does not execute the second outer loop.

9. What will be the output of the following PHP code?

```
<?php
```
```
$a = array("hi", "hello", "bye");
```
```
foreach ($a as $value) 
```
```
{
```
```
    if (count($a) == 2)
```
```
	    print $value;         
```
```
}
```
```
?>
```

a) hihellobye
b) infinite loop
c) hihello
d) no output
View Answer

Answer: d
Explanation: As count($a) returns 3 the condition is always false.

10. What will be the output of the following PHP code?

```
<?php
```
```
$a = array("hi", "hello", "bye");
```
```
for (;count($a) < 5;) 
```
```
{
```
```
    if (count($a) == 3)
```
```
	    print $a;         
```
```
}
```
```
?>
```

a) ArrayArrayArrayArrayArrayArray….infinitely
b) (“hi”,”hello”,”bye”)(“hi”,”hello”,”bye”)(“hi”,”hello”,”bye”)(“hi”,”hello”,”bye”)…infinitely
c) hihellobyehihellobyehihellobyehihellobyehihellobyehihellobye…..infinitely
d) no output
View Answer

Answer: a
Explanation: As count($a) returns 3 the condition is always true, thus it prints $a, which returns its data type.

Sanfoundry Global Education & Learning Series – PHP Programming.

To practice all areas of PHP Programming, here is complete set of 1000+ Multiple Choice Questions and Answers on PHP.

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