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1. Which of the following will not add john to the users array?
1. $users[] = 'john';
2. array_add($users,'john'); //wrong
3. array_push($users,'john');
4. $users ||= 'john'; //wrong
2. What's the difference between sort(), asort() and ksort? Under what circumstances would you use each of these?
my an:sort()-排序 asort()-保持key值排序 ksort()-以key順序排序 rsort()-逆排序 arsort()-保持key值逆排序 krsort()-以key逆順序排序
3. What would the following code print to the browser? Why?
$num = 10;
function multiply()
{
$num = $num * 10;
}
multiply();
echo $num;
my an:10 because var scope4. What is the difference between a reference and a regular variable? How do you pass by reference & why would you want to?
5. What functions can you use to add library code to the currently running script?
6. What is the difference between foo() & @foo()?
7. How do you debug a php application?
8. What does === do? What's an example of something that will give true for ‘==', but not ‘==='?
9. How would you declare a class named “myclass” with no methods or properties?
10. How would you create an object, which is an instance of “myclass”?
11. How do you access and set properties of a class from within the class?
12. What is the difference between include & include_once? include & require?
13. What function would you use to redirect the browser to a new page?
1. redir() 2. header() 3. location() 4. redirect()
my an :2
14. What function can you use to open a file for reading and writing?
1. fget(); 2. file_open(); 3. fopen(); 4. open_file();my an :315. What's the difference between mysql_fetch_row() and mysql_fetch_array()?
16. What does the following code do? Explain what's going on there.
$date='08/26/2003'; print ereg_replace(“([0-9]+)/([0-9]+)/([0-9]+)”,2/1/3,$date);17. Given a line of text $string, how would you write a regular expression to strip all the HTML tags from it?
18. What's the difference between the way php and Perl distinguish between arrays and hashes?
19. How can you get round the stateless nature of HTTP using php?
20. What does the GD library do?
21. Name a few ways to output (print) a block of HTML code in php?
22. Is php better than Perl? 主站蜘蛛池模板： 安乡县| 开封县| 资阳市| 曲阜市| 望江县| 伊金霍洛旗| 桃园市| 克东县| 宁明县| 竹溪县| 营山县| 永兴县| 武乡县| 原阳县| 双峰县| 曲麻莱县| 七台河市| 清涧县| 马尔康县| 耿马| 海淀区| 微博| 遵义县| 乐至县| 兴化市| 道真| 漳州市| 定州市| 重庆市| 永州市| 安康市| 耒阳市| 榆林市| 鄂伦春自治旗| 沙田区| 凤城市| 正镶白旗| 合川市| 荆州市| 仙桃市| 茂名市|