#zce

Endless list of Celebrity Crushes | Zendaya Coleman (2/-)

And this is the entry in question:

I will concede that it is pretty bare-bones, but not as much as some actual ZCEs I've seen, most of which I personally commented out. What really gets me is that the notification came more than three months after I made the entry, and I can't even ask why because I was suspended from pretty much everything except editing and the TLP earlier this year and am unlikely to be unsuspended. :P

Indexes, keys, values ... they all have some surprises for you

As a PHP programmer you are dealing with arrays every single day, meaning that there is a high probability of hitting some "unexpected" results. In this article we will not deal with array operations and functions.

Try to answer the following questions, we'll explain the results at the end of this article:

a) Problem:

<?php // a.) What is the output of count($array)? $array = array(1 => "Serban", "1" => "Ghita", "John", 2 => "Doe"); ?>

Answer: 2

b) Problem:

<?php // b.) What will the following script display? (1 answer) $array = array('Serban' => 'Ghita', 'John' => 'Smith'); function myName(){ return 'Serban'; } echo $array[myName()]; // 1. Parse error // 2. Ghita // 3. NULL // 4. Notice: Use of undefined constant myName + NULL ?>

Answer: Ghita

c) Problem:

<?php // c.) What is the output of strlen($text) ? // d.) What is the output of count($text) ? $text = 'Serban'; $text[7] = 'Ghita'; ?>

Answer:

8 1 // (ok I know this is not an array question, I'm playing with your mind)

d) Problem:

<?php // e.) What is the resulting key of the value 'Serban' ? $array = array(0 => 'Octav', 1 => 'Bogdan', 2 => 'Marius', 3 => 'Ciprian', 4 => 'Iulian'); foreach($array as $key => $value){ unset($array[$key]); } $array[] = 'Serban'; ?>

Answer: 5

e) Problem:

<?php // f.) What is the result of the var_dump() function? $a = array(false => 'Serban', true => 'Ghita'); $b = array('Serban', 'Ghita'); var_dump($a===$b); ?>

Answer: true

f) Problem:

<?php // g.) What is the output? $a = array(1, 2, 3); $b = &$a[0]; $a2 = $a; $a2[0]++; echo( $a[0] ); ?>

Answer: 2

Answers explained

a) Array keys can only be of integer and string type. '1' will be interpreted as 1, but '01' will be interpreted as '01'. If you provide an array with two identical keys the latter will override the former. If a key is not specified for a value, the maximum of the integer indices is taken and the new key will be that value plus 1.

b) In an array the key between the square brackets [] can be an expression, that means both $arr[test()] and $arr[test($var)] is valid code.

c) and d.) Serban string has a length of 6. $text[7] adds G character on the 8th position and automatically pads the 7th position with a space, resulting Serban G. Obviously count($string) that is not null is always 1. Note that count(null) is 0.

d) Unsetting keys in $array doesn't resets the index value. Doing reset($array) will reset the index, doing unset($array) will destroy the array and reset the index.

e) Remember that array keys can only be strings or integers, so false evaluates to 0 and true to 1. The arrays are identical and the keys are in the same order.

Note that:

<?php $a = array(0 => 'Serban', 1 => 'Ghita'); $b = array(1 => 'Ghita', 0 => 'Serban'); var_dump($a==$b); // bool(true) var_dump($a===$b); // bool(false) ?>

PHP5 supports which of the following XML parsing methods? (Choose 4)

SAX

FastDOM

DOM

XPath

XML to Object mapping

The answer is 1,3,4,5

Passed!

開工大吉，賀！