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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： 新丰县| 江北区| 平和县| 赤城县| 岚皋县| 中江县| 桂阳县| 郓城县| 广灵县| 浦江县| 莱州市| 富顺县| 昌邑市| 漳州市| 常德市| 汤阴县| 防城港市| 高台县| 安福县| 百色市| 福州市| 天柱县| 湾仔区| 定结县| 城口县| 宣城市| 大埔县| 北辰区| 天峨县| 贵德县| 锡林浩特市| 车致| 璧山县| 堆龙德庆县| 兴城市| 安福县| 丰县| 茶陵县| 调兵山市| 安国市| 成都市|