The simplest PHP program-the stenographer

Principle: & nbsp; 1. the first user browses a page. 2. the number of times the server program reads the page from the database or file. 3. store the number of times and send it back to the first user. 4. the second user browsed a page. 5. the number of times the server program reads the page from the database or file. 6. The principle of SyntaxHighlighter. all is as follows:
1. the first user browses a page.
2. the number of times the server program reads the page from the database or file.
3. store the number of times and send it back to the first user.
4. the second user browsed a page.
5. the number of times the server program reads the page from the database or file.
6. store the number of times and send it back to the second user.
Functions to be understood:
Fopen () open a file
Filesize () to get the file size
Fseek () move file pointer
Fgets () obtains the row content of the file pointer.
Fputs () writes the string as the position of the file pointer.
Fclose () close the file
File_exists () to determine whether a file exists
Exec () executes external programs

The simplest calculator:


Visitor counter prototype


/*
(C) 1998 David W. Bettis
Here is the copyright information
*/

$ CounterFile = "counter.txt ";
# Here is the definition counter file

Function displayCounter ($ counterFile ){
$ Fp = fopen ($ counterFile, "rw ");
# Open a file and use the read/write method

$ Num = fgets ($ fp, 5 );
# Obtain the current number

$ Num + = 1;
# Add 1

Print "you are the". "$ num". "bit boring ";
Exec ("rm-rf $ counterFile ");
Exec ("echo $ num> $ counterFile ");
# The Method of laziness. do not use fputs for writing.
}

If (! File_exists ($ counterFile )){
Exec ("echo 0> $ counterFile ");
} # If the recorder file does not exist, create it and set the content to 0.

DisplayCounter ($ counterFile );

?>


Php (as the mainstream development language) is a relatively simple version:
# No copyright, so easy

$ Fp = fopen ("counter.txt", "r + ");
Flock ($ fp, 3 );
# Open the recorder file and lock it

$ Fsize = filesize ("count.txt ");
$ Count = fgets ($ fp, $ fsize + 1 );
$ Count ++;
# Obtain the digital and add one

Fseek ($ fp, 0 );
Fputs ($ fp, $ count );
Fclose ($ fp );
# Writing new digital data into a file

Echo "you are the $ count visitor ";
?>

Php (as the mainstream development language) stenographer graphic version:
I will not elaborate on creating 10 images and concatenating numbers with pictures.
Fake Image: 0.gif ~ 9. gif

... $ Count is the obtained value.
$ Strcount = strval ($ count );
$ Strcount = chop ($ strcount );
$ Countlen = $ strlen ($ strcount );
$ Shtml = "";
For ($ I = 0; $ I <$ countlen; $ I ++ ){
$ Shtml. = "$ shtml. = $ strcount [$ I];
$ Shtml. = ". gif> ";
}
Echo $ shtml;
?>

Php database version:
Use the SQL calculator to create a table first
Create table counter
(
Counter int not null,
Id