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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： 亚洲欧美一级久久精品 | 国产成人在线播放视频 | 国产一级一极性活片 | 免费在线国产视频 | 欧美激情视频在线观看免费 | 就要爱综合 | 欧美综合视频在线 | 在线视频免费国产成人 | 亚洲欧美日韩在线2020 | 国产百合一区二区三区 | 国产成人综合亚洲欧洲色就色 | 四虎在线永久免费观看 | 五月婷婷丁香久久 | 国产91在线免费观看 | 国产高清精品自在线看 | 国产精品一区不卡 | 日韩中文字幕一在线 | 精品一区二区三 | 热99精品视频 | 伊人色综合一区二区三区 | 狠狠综合| 亚欧三级 | 911精品国产91久久久久 | 黄色影片在线观看 | 日韩中文有码高清 | 国产成人午夜片在线观看 | 精品国产自在现线看 | jizz亚洲女人高清 | 色多多www视频在线观看免费 | 久久人人爽人人爽人人片宅男 | 国产特黄一级一片免费 | 99热精品成人免费观看 | 一本久道久久综合狠狠爱 | 欧美久草| 国产成人91高清精品免费 | 亚洲精品第一国产综合高清 | 国产在线看不卡一区二区 | 久久久久综合网久久 | 一国产大片在线观看 | 久久久久综合网 | 日韩中文字幕在线亚洲一区 |