PHP Interview Second bomb

These two days went to find abuse, after the interview feeling born can not love, hehe. Well, don't say much, just go straight to the question.

1, talk about the difference between the session and the cookie.
Don't want to say, self-Baidu bar.
But let's just say that session_id is usually stored in cookies and passed through header headers to the server, and if a cookie is disabled, it can only be passed through the URL.

2, write the results of the following procedure.

     functionchangenum($input){$input= -; } functionchangearray($input){$input[' key '] = -; } functionchangeobj($input){$input->key = -; } functionchangestr($input){$input=' + '; }$input=0; Changenum ($input);Echo$input.'
';$input 2[' key '] =0; Changearray ($input 2);Echo$input 2[' key '].'
';$input 3=NewClass1 ();$input 3->key =0; Changeobj ($input 3);Echo$input 3->key.'
';$input 4=' 123 '; CHANGESTR ($input 4);Echo$input 4; classClass1{}?>

The main research here is the storage of data types and the problem of reference methods.

3, how to exchange the values of A and B without a third variable.

$a1;$b2;list($a,$b)=array($b,$a);echo$a.$b;

Another way to do this is through the interception of strings, which is not introduced here.

The difference between 4,pdo and MySQL.

Well, PDO is better than Php-mysql. Don't ask me where the hell is, I don't know.

5, in at least two ways to implement the display encoding of the specified page

header('content-type:text/html;charset=utf-8');
  
   "utf-8" />

What does the 6,http request header return 200 and 404 represent?

200, indicating that the request was successful.
404, indicating that the request resource does not exist.

Temporarily can only think of these words, and later remembered to add.

'). addclass (' pre-numbering '). Hide (); $ (this). addclass (' has-numbering '). Parent (). append ($numbering); for (i = 1; i <= lines; i++) {$numbering. Append ($ ('

'). Text (i)); }; $numbering. FadeIn (1700); }); });

The above describes the PHP interview second play, including the aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

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