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騰訊PHP筆試？

時間：2022-07-10 21:58:47 筆試我要投稿

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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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