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騰訊PHP筆試？
1. 請對POSIX風格和兼容Perl風格兩種正則表達式的主要函數進行類比說明
ereg preg_match
ereg_replace preg_replace
2. 請說明在php.ini中safe_mode開啟之后對于PHP系統函數的影響
3. PHP5中魔術方法函數有哪幾個，請舉例說明各自的用法
__sleep
__wakeup
__toString
__set_state
__construct,
__destruct
__call,
__get,
__set,
__isset,
__unset
__sleep,
__wakeup,
__toString,
__set_state,
__clone
__autoload
4. 請寫出讓，并說明如何在命令行下運行PHP腳本(寫出兩種方式)同時向PHP腳本傳遞參數?
5. PHP的垃圾收集機制是怎樣的
6.使對象可以像數組一樣進行foreach循環，要求屬性必須是私有。
(Iterator模式的PHP5實現，寫一類實現Iterator接口)
7.請寫一段PHP代碼，確保多個進程同時寫入同一個文件成功
8. 用PHP實現一個雙向隊列
9. 使用正則表達式提取一段標識語言(html或xml)代碼段中指定標簽的指定屬性值(需考慮屬性值對不規則的情況，如大小寫不敏感，屬性名值與等號間有空格等)。此處假設需提取test標簽的attr屬性值，請自行構建包含該標簽的串
10.請使用socket相關函數(非curl)實現如下功能：構造一個post請求，發送到指定http server的指定端口的指定請求路徑請求中包含以下變量：
用戶名(username)：溫柔一刀
密碼(pwd)：&123=321&321=123&
個人簡介(intro)：Hello world!
且該http server需要以下cookie來進行簡單的用戶動作跟蹤：
cur_query：you&me
last_tm：...(上次請求的unix時間戳，定為當前請求時間前10分鐘)
cur_tm：...(當前請求的unix時間戳)
設置超時為10秒，發出請求后，將http server的響應內容輸出。復制內容到剪貼板代碼:Function encode($data, $sep = ‘&’){
while (list($k,$v) = each($data)) {
$encoded .= ($encoded ? "$sep" : "");
$encoded .= rawurlencode($k)."=".rawurlencode($v);
}
Return $encoded;
}
Function post($url, $post, $cookie){
$url = parse_url($url);
$post = encode($data, ‘&’);
$cookie = encode($cookieArray, ‘;’);
$fp = fsockopen($url[host], $url[port] ? $url[port] : 80, $errno, $errstr, 10);
if (!$fp) return "Failed to open socket to $url[host]";
fputs($fp, sprintf("POST %s%s%s HTTP/1.0 ", $url[path], $url[query] ? "?" : "", $url[query]));
fputs($fp, "Host: $url[host] ");
fputs($fp, "Content-type: application/x-www-form-urlencoded ");
fputs($fp, "Content-length: " . strlen($encoded) . " ");
fputs($fp, "Cookie: $cookie ");
fputs($fp, "Connection: close ");
fputs($fp, "$post ");
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
$url = ‘http://www.example.com:8080/test’;
$encoded = username=溫柔一刀& pwd=
$post = array(
‘username’=> ‘溫柔一刀’,
‘pwd => ‘&123=321&321=123&’,
‘intro => ‘Hello world!’
);
$cookie = array(
‘cur_query’ => ‘you&me,
‘last_tm’ => time() - 600,
‘cur_tm ‘=> time()
);
Post($url, $post, $cookie);
11.你用什么方法檢查PHP腳本的執行效率(通常是腳本執行時間)和數據庫SQL的效率(通常是數據庫Query時間)，并定位和分析腳本執行和數據庫查詢的瓶頸所在?
1.腳本執行時間，啟用xdebug，使用WinCacheGrind分析。
2.數據庫查詢，mysql使用EXPLAIN分析查詢，啟用slow query log記錄慢查詢。
PHP LAMP Engineer Test Paper
Question 1
What does print out?
A) 3
B) False
C) Null
D) 1
E) 0
Question 2
Which of the following snippets prints a representation of 42 with two decimal places?
A) printf("%.2d ", 42);
B) printf("%1.2f ", 42);
C) printf("%1.2u ", 42);
Question 3
Given
$text = Content-Type: text/xml;
Which of the following prints text/xml?
A) print substr($text, strchr($text, :));
B) print substr($text, strchr($text, :) + 1);
C) print substr($text, strpos($text, :) + 1);
D) print substr($text, strpos($text, :) + 2);
E) print substr($text, 0, strchr($text, :)
Question 4
What is the value of $a?
$a = in_array(01, array(1)) == var_dump(01 == 1);
?>
A) True
B) False
Question 5
What is the value of $result in the following PHP code?
function timesTwo($int) {
$int = $int * 2;
}
$int = 2;
$result = timesTwo($int);
?>;
Answer: NULL
Question 6
The code below ___________ because ____________.
class Foo {
?>
function bar() {
print "bar";
}
}
?>
A) will work, class definitions can be split up into multiple PHP blocks.
B) will not work, class definitions must be in a single PHP block.
C) will not work, class definitions must be in a single file but can be in multiple PHP blocks.
D) will work, class definitions can be split up into multiple files and multiple PHP blocks.
Question 7
When turned on, ____________ will _________ your script with different variables from HTML forms and cookies.
A) show_errors, enable
B) show_errors, show
C) register_globals, enhance
D) register_globals, inject
Question 8
What will be the output of the following PHP code:
echo count(strlen("http://php.net"));
?>
Answer: 1
Question 9
What is the best all-purpose way of comparing two strings?
A) Using the strpos function
B) Using the == operator
C) Using strcasecmp()
D) Using strcmp()
Question 10
What is the difference between "print()" and "echo()"?
Answer: print is a function,echo is a language construct
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