New users ask PHP experts to correct code errors, a simple BLOG code. -Php Tutorial

I just got in touch with PHP. now I have learned a simple blog from "no basic learning PHP" compiled by Chen Hao. After I typed the code, I found that an error occurred during execution, when I enter the title and content for submission, click to view the log page to display "request Parameter error", but I do not know where the problem is. And for the following...

I just got in touch with PHP. now I have learned a simple blog from "no basic learning PHP" compiled by Chen Hao. After I typed the code, I found that an error occurred during execution, when I enter the title and content for submission, click to view the log page to display "request Parameter error", but I do not know where the problem is. If you do not understand the following code, please answer them together:

1. What is the role of $ OK in add. php5? The lines of code it appears are not very understandable.

2. Why is the code in if (mkdir ($ folder) and If (strlen ($ result)> 0) use a double slash? It seems that it is not used for annotation.

3. A href = "post. php5? Entry = '. $ entry.' "this line of code does not understand why there are periods before and after $ entry. I hope to explain this line to me.

The related code has been attached. I am a Cainiao with the help of a friend who wishes to understand it. I am very grateful.

Add. php5

  An error occurred while creating the directory. An error occurred while adding the log.
';}}$ Fp = @ fopen ($ file_name, 'w'); if ($ fp) {flock ($ fp, LOCK_EX); $ result = fwrite ($ fp, $ blog_str); $ lock = flock ($ fp, LOCK_UN); fclose ($ fp);} if (strlen ($ result)> 0) {// $ OK = false; $ msg = 'Log added successfully, view this log topic '; echo $ msg ;}}?>            Simple text-based BLOG        
              
 
My BLOG
        
----- I have dream...
        
 
 
Add a new log
                
 
                    
  
                  
            
        
        
 
 
About me
                
I am a PHP enthusiast
            
        
        
CopyRight 2011
    
    

Style.css

body{    font-size:12px;    background-color:#c6c68c;    padding:0;    font-family:Helvetica,sans-serif;}#container{    margin-left:auto;    margin-right:auto;    margin-top:2px;    margin-bottom:0;    padding:0;    width:760px;    background-color:#f6f6f6;    border:1px solid #000;}#header{    margin-left:auto;    margin-right:auto;    padding:8px;    height:80px;    background-color:#E8F3FD;    border-bottom:1px solid #000;    font-size:16px;    font-weight:bold;}#title{    margin-left:auto;    margin-right:auto;    padding:8px;    height:10px;    background-color:#E8F3FD;    border-bottom:1px solid #000;    font-style:italic;}#left{    float:left;    margin:6px 0 4px 2px;    padding:5px;    width:530px;}#right{    float:right;    margin:6px 0 4px 2px;    padding:5px;    width:200px;}#blog_entry{    margin-left:auto;    margin-right:auto;    margin-top:4px;    margin-bottom:10px;    border:1px solid #000;    background-color:#fff;}#blog_title{    border-bottom:1px solid #000;    background-color:#e8ecdb;    margin:0px;    padding:4px;    font-weight:bold;    font-size:13px;}#blog_body{    margin-left:auto;    margin-right:auto;    padding:0 0 8px 0;    font-size:10px;}#blog_date{    margin-left:auto;    margin-right:auto;    padding:0 0 8px 0;    font-size:10px;}#sidebar{    margin-left:auto;    margin-right:auto;    border:1px solid #000;    width:180px;    background-color:#fff;}#menu_title{    border-bottom:1px solid #000;    background-color:#e8ecdb;    margin:0px;    padding:4px;    height:10px;    font-weight:bold;}#menu_body{    margin-left:auto;    margin-right:auto;    margin-top:4px;    padding:6px;}#footer{    clear:both;    text-align:center;    margin-left:auto;    margin-right:auto;    padding:8px;    height:10px;    background-color:#e8f3fd;    border-top:1px solid #000;}#err{    color:red;}

Post. php5

  Log Title:'. $ Content_array [0]; echo'
Release date:'. Date ('Y-m-d H: I: S', $ content_array [1]); echo ""; echo $ content_array [2];?>

Reply content:

I just got in touch with PHP. now I have learned a simple blog from "no basic learning PHP" compiled by Chen Hao. After I typed the code, I found that an error occurred during execution, when I enter the title and content for submission, click to view the log page to display "request Parameter error", but I do not know where the problem is. If you do not understand the following code, please answer them together:

1. What is the role of $ OK in add. php5? The lines of code it appears are not very understandable.

2. Why is the code in if (mkdir ($ folder) and If (strlen ($ result)> 0) use a double slash? It seems that it is not used for annotation.

3. A href = "post. php5? Entry = '. $ entry.' "this line of code does not understand why there are periods before and after $ entry. I hope to explain this line to me.

The related code has been attached. I am a Cainiao with the help of a friend who wishes to understand it. I am very grateful.

Add. php5

  An error occurred while creating the directory. An error occurred while adding the log.
';}}$ Fp = @ fopen ($ file_name, 'w'); if ($ fp) {flock ($ fp, LOCK_EX); $ result = fwrite ($ fp, $ blog_str); $ lock = flock ($ fp, LOCK_UN); fclose ($ fp);} if (strlen ($ result)> 0) {// $ OK = false; $ msg = 'Log added successfully, view this log topic '; echo $ msg ;}}?>            Simple text-based BLOG        
              
 
My BLOG
        
----- I have dream...
        
 
 
Add a new log
                
 
                    
  
                  
            
        
        
 
 
About me
                
I am a PHP enthusiast
            
        
        
CopyRight 2011
    
    

Style.css

body{    font-size:12px;    background-color:#c6c68c;    padding:0;    font-family:Helvetica,sans-serif;}#container{    margin-left:auto;    margin-right:auto;    margin-top:2px;    margin-bottom:0;    padding:0;    width:760px;    background-color:#f6f6f6;    border:1px solid #000;}#header{    margin-left:auto;    margin-right:auto;    padding:8px;    height:80px;    background-color:#E8F3FD;    border-bottom:1px solid #000;    font-size:16px;    font-weight:bold;}#title{    margin-left:auto;    margin-right:auto;    padding:8px;    height:10px;    background-color:#E8F3FD;    border-bottom:1px solid #000;    font-style:italic;}#left{    float:left;    margin:6px 0 4px 2px;    padding:5px;    width:530px;}#right{    float:right;    margin:6px 0 4px 2px;    padding:5px;    width:200px;}#blog_entry{    margin-left:auto;    margin-right:auto;    margin-top:4px;    margin-bottom:10px;    border:1px solid #000;    background-color:#fff;}#blog_title{    border-bottom:1px solid #000;    background-color:#e8ecdb;    margin:0px;    padding:4px;    font-weight:bold;    font-size:13px;}#blog_body{    margin-left:auto;    margin-right:auto;    padding:0 0 8px 0;    font-size:10px;}#blog_date{    margin-left:auto;    margin-right:auto;    padding:0 0 8px 0;    font-size:10px;}#sidebar{    margin-left:auto;    margin-right:auto;    border:1px solid #000;    width:180px;    background-color:#fff;}#menu_title{    border-bottom:1px solid #000;    background-color:#e8ecdb;    margin:0px;    padding:4px;    height:10px;    font-weight:bold;}#menu_body{    margin-left:auto;    margin-right:auto;    margin-top:4px;    padding:6px;}#footer{    clear:both;    text-align:center;    margin-left:auto;    margin-right:auto;    padding:8px;    height:10px;    background-color:#e8f3fd;    border-top:1px solid #000;}#err{    color:red;}

Post. php5

  Log Title:'. $ Content_array [0]; echo'
Release date:'. Date ('Y-m-d H: I: S', $ content_array [1]); echo ""; echo $ content_array [2];?>

What books did you read? Can I photograph the code in your book?

Answer your question by the way:

1. That$okThe variable does not seem to be useful at the moment. it may be used to record whether an error occurs during code execution and assign itfalseAccording to its value, it is displayed as successful or failed to add.

2. Added//That is, the line of code will not be executed.

3. In PHP.Is used to connect strings. in your code, it is used to spell HTML code.
   Example:

As for the error you mentioned at the beginning, I think the reason may be that you did not take it seriously when you typed the code._Underline.
See:

Compare the entered code with the code in your book.


The landlord is a sister.