Collection of PHP interview questions compiled by color_PHP tutorial

PHP basic knowledge part

1. Find the value of $a

Copy code The code is as follows:

$ a = "hello";
$b = &$a;
unset($b);
$b = "world";
echo $a;

2. Find the value of $b

Copy code The code is as follows:

$a = 1;
$x = &$a;
$b = $a++;
echo $b;

3. Write a function to delete the specified directory including all subdirectories and files under it

4. Write a function to calculate the relative paths of two files, such as:
$a = '/a/b/c/d/e.php';
$b = '/ a/b/12/34/c.php';


Javascript basic knowledge part

1. Talk about several ways to implement inheritance in js and write a demo

2. Talk about the js framework you are familiar with, and implement the acquisition of the following DOM elements

Required to find drag="true " and index="1" or div without index attribute

Tips: If you can't write it out at once, please complete the following steps
1. Find drag="true" and index="1"

2. Find

with drag="true" and no index attribute. 3. Combine the two to get


3. Implement a mask layer effect, Require the elements to be displayed to be centered on the page

4. Closure knowledge inspection

Copy the code The code is as follows:

function step(a){
return function(x){
return x+a++;
}
}

var a = step(10);
var b = step(20);
alert(a(10));
alert(b(20));
var a="123abc";
alert(typeof(a++ ));
alert(a);

MySQL knowledge part

1. In a content management system, the message table has the following fields
id article id
title article title
content article content
category_id article category id
hits clicks

Create the above table and write the MySQL statement

2. Same as above Content management system: The table comment records user reply content. The fields are as follows:
comment_id reply id
id article id, associated with the id in the message table
comment_content reply content

now needs to be obtained by querying the database A list of article titles in the following format, sorted by the number of replies, with the highest reply at the top

Article id Article title clicks and number of replies

Use a SQL statement to complete the above query, if the article If there is no reply, the number of replies will be displayed as 0


3. In the above content management system, the category information is saved in the table category, and the fields are as follows

category_id int(4) not null auto_increment;
category_name varchar(40) not null;

When the user enters an article, select the article category by selecting the drop-down menu

Write how to implement this drop-down menu [can use PHP, JAVASCRIPT, HTML]


Mysql knowledge extension part

4. The system needs to expand the classification table so that it can support unlimited levels of classification. Please design this table structure and complete the following according to your design Scenario

1. Find all articles under the specified category (including all articles under subcategories)
2. Find the category of the specified article to the level of the root category, for example:
Article "Mysql" Optimization experience" It corresponds to "Programming/Mysql/Operation and Maintenance/"
3. When deleting a category, it is required to also delete all sub-categories under it


5. The system needs to add articles to the article The tag function, (tags and articles are in a many-to-many relationship), is used to implement the "related articles" function. Please design this table structure,
and complete the following scenarios according to your design.

1 . Find the five articles that are most similar to the specified article (the similarity algorithm is based on the number of the same tags, the larger the number, the more similar it is)


Comprehensive knowledge part:

1. Talk about your understanding of Cookies and Sessions, what are their applicable scenarios, and if possible, can you elaborate on how to share Sessions in multiple applications

2. Talk about your understanding of single sign-on understanding, such as principles and implementation, and what issues need to be paid attention to during the implementation process

3. Talk about your understanding of MVC, what are the shortcomings of MVC, and what would you like to do if you were asked to implement an MVC framework? Implementation?

4. Talk about the permission management part that you use in your daily work. How do you understand and implement it?

http://www.bkjia.com/PHPjc/325262.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/325262.htmlTechArticlePHP basic knowledge part 1. Find the value of $a Copy the code The code is as follows: $a = "hello"; $ b = unset($b); $b = "world"; echo $a; 2. Find the value of $b and copy the code as follows: $a = 1; $x = $b = $a+...