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laurellion’s Tests

PHP Intermediate

A test by Lawrence Badanai.

Test Questions

Question

What colour cables should you use to connect a server running PHP to your network?

Answers

Correct	Answer Text
	Colour doesn't matter.
	White or Grey; coloured cables are to a lower spec than you need for a high performance engine such as PHP, and will give rise to a higher proportion of collisions.
	You should avoid bright colours such as pink or yellow, since these cable tend to be crossed and are designed for use connecting two systems back to back for the syncronisation of data, rather than for the connection of a server to clients.

Question

The regular expression [a-z]{2,3}$ will only match

Answers

Correct	Answer Text
	any string that ends with 2 or 3 lower case letters
	any string that comprises 2 or 3 lower case letters
	any string that starts with 2 or 3 lower case letters
	any string that ends with 2 or more lower case letters

Question

By default, variables that you set in your PHP code are retained

Answers

Correct	Answer Text
	Throughout the piece of PHP ( <?php to >> ) in which they are declared.
	Throughout the current page, and subsequent pages run by the same user on your web site.
	Throughout the piece of PHP ( <?php to >> ) in which they are declared, and in any functions which are called from that block
	Throughout the PHP block ( { to } ) where they are declared, even if that PHP block has intermediate HTML sections within it.

Question

Which of these could be used to maintain a variable from one form to the next?

Answers

Correct	Answer Text
	variable_issaved()
	session_register()
	An image watermark
	static()

Question

Which of these statements is true?

Answers

Correct	Answer Text
	PHP interfaces to a number of relational databases such as MySQL, Oracle and Sybase. A wrapper layer is provided so that code written for one database can easily be transferred to another if you later switch your database engine.
	There's little code in PHP to help you interface to databases, but there's no reason why you can't write such code if you want to.

Question

If you want to change every occurrence of "Mary" to "Maria" in a variable, you would:

Answers

Correct	Answer Text
	$string =~ s/Mary/Maria/;
	Split the string at "Mary", the join it with "Maria".
	Explode the string at "Mary", then Implode it with "Maria".
	$string =~ s/\bMary\b/Maria/ig;

Question

The function used to delete a file is

Answers

Correct	Answer Text
	unlink()
	delete_file()
	del()
	delete()
	rem()
	remove()

Question

To read a file into an array, which function might you use?

Answers

Correct	Answer Text
	There's no single function to do this; you have to use a loop, using fgets() to read each line and checking for completion using feof()
	slurp()
	file_read()
	pull()
	file()
	array_walk()

Question

How would you add 1 to the variable $count?

Answers

Correct	Answer Text
	count++;
	$count =+1
	$count++;
	incr count;
	incr $count;

Question

Which function(s) would you use to read a line of space separated fields, where double quotes and backslashes have been used to protect embedded spaces?

Answers

Correct	Answer Text
	fgetcsv()
	explode(fgets())
	split(fgets())
	fgetsplit()

Question

PHP can be used to generate server side graphics on a web site

Answers

Correct	Answer Text
	False
	True

Question

You can set a cookie (if the user is accepting them)

Answers

Correct	Answer Text
	From within your PHP page, at any time
	From within your PHP page; you can set a cookie at any time if your server is configured to buffer your output, but you can only send it before any regular (HTML) data is send to the browser if your server is configured to NOT buffer (see php.ini)
	From within your PHP page, but only before it send out any data to the browser.
	From instructions held in the php.ini file
	From within your PHP page, but only after you've completed sending out the body of the response page.

Question

Are there regular expressions in PHP?

Answers

Correct	Answer Text
	No - PHP uses "glob" style matching only
	Yes - regular expressions use the POSIX standard
	Yes - two sets. One uses tha POSIX standard and the other uses Perl-like conventions.
	Yes - regular expressions use Perl-like conventions
	Yes - regular expressions handling is the same as in awk and gawk