Introduction to Knowledge points:
1. Determine if a file or directory exists in bool
Copy CodeThe code is as follows:
File_exists (string filename)
2. Get the file name
Copy CodeThe code is as follows:
BaseName (filepath)
3. Open File
Copy CodeThe code is as follows:
fopen (Filename,mode)
4. Get File path information
Copy CodeThe code is as follows:
PathInfo (PATH)
5. Writing files
Copy CodeThe code is as follows:
Fwrite (resource,string)
6. Take the absolute path
Copy CodeThe code is as follows:
Realpath (filename)
7. Close the file
Copy CodeThe code is as follows:
Fclose ($handle)
8. Copying files
Copy CodeThe code is as follows:
Copy (Source,dest)
9. Read a row of data
Copy CodeThe code is as follows:
fgets (int handle[,int length])
10. Determine if it is a directory
Copy CodeThe code is as follows:
Is_dir (filename)
11. Read the entire file
Copy CodeThe code is as follows:
ReadFile (filename)
12. Open Directory
Copy CodeThe code is as follows:
Opendir (PATH)
13. Fetch File Size
Copy CodeThe code is as follows:
FileSize (filename)
14. Reading the Directory
Copy CodeThe code is as follows:
Readdir ($handle)
15. deleting files
Copy CodeThe code is as follows:
Unlink ()
16. Close the Directory
Copy CodeThe code is as follows:
Closedir ($handle)
17. Create a Directory
Copy CodeThe code is as follows:
mkdir (dirname)
18. Deleting a directory
Copy CodeThe code is as follows:
Unlink ()
19. Determine if a file or directory exists
Copy CodeThe code is as follows:
BOOL File_exists (string filename)
20. Determine if the file or directory exists, the presence returns True, or False
Format:
Copy CodeThe code is as follows:
if (file_exists ("Hello.txt"))
{
echo "File exists";
}
Open File
Format:
fopen (Filename,mode)
Description: Opens the specified file in the specified format
FileName: The file name to open
Mode: Open modes
fopen ("Hello.txt", "w");
means to open the Hello.txt file as written
Write a file
Format:
Fwrite (resource,string);
Description: Adds the specified content to the open file
Resource: Open File
String: What to write
Cases:
$handle = fopen ("Hello.txt", "w")//If a, data can be appended
Fwrite ($handle, "1\r\n")
Close File
Format:
Fclose ($handle)
Description: Close the Open file
Cases:
Copy CodeThe code is as follows:
$handle = fopen ("Hello.txt", "w");
Fclose ($handle);
Reading a row of data
Format:
fgets (int handle[,int length])
Description: Reads a length-1 character. If length is not specified, the default byte is 1KB.
If you encounter a newline, EOF, or have read length-1 characters, the program terminates,
Returns False when error occurs;
Cases:
Copy CodeThe code is as follows:
$handle = fopen ("Hello.txt", "R");
$buffer = fgets ($handle, 1024);
Echo $handle; Output one line of information
Read the entire file
Format:
ReadFile (filename)
Description: Reads the entire file and outputs it to the browser
Cases:
Copy CodeThe code is as follows:
ReadFile ("Hello.txt");
?>
Fetch file Size
Format:
FileSize (filename)
Description: Gets the specified file size, error returns false
Cases:
FileSize ("A.rar")
deleting files
Format:
Unlink ()
Description: Delete a file, return true if successful, or return false
Cases:
Unlink ("B.txt")
Create a Directory
Format:
mkdir (dirname)
Description: Create a directory
Example: mkdir ("NewFolder"); Create new folder under current directory
Delete Directory
Format:
RmDir (dirname)
Description: Delete a directory
Example: RmDir ("NewFolder");
Get file name
Format:
BaseName (filepath)
Description: Returns the file name from the specified path
Cases:
BaseName ("C:\mytools\a.txt")//Return to A.txt
Get File path information
PathInfo (PATH)
Note: Returns the file path information, the result is saved in the array, the array is labeled
DirName (Path), basename (file name), extension (extension)
Example: PathInfo ("C:\mytools\a.txt")
Take absolute path
Format:
Realpath (filename)
Description: Takes the absolute path of the specified file and returns False if it fails
Example: Realpath ("H.txt")//f:\apache\example\h.txt
Copying files
Format:
Copy (Source,dest)
Description: Copy the source file to Dest
Example: Copy ("H.txt", "Newfloder\a.txt")
Determine if it is a directory
Format:
Is_dir (filename)
Description: Determines whether a given file name is a directory. If filename exists and
Returns true for the directory, otherwise false is returned.
Cases:
Copy CodeThe code is as follows:
if (Is_dir ("NewFolder"))
{
echo "is the file directory";
}
Open Directory
Format: Opendir (PATH)
Description: Opens a specified file directory and returns a resource identifier
Cases:
$hand = Opendir (".")//Open root directory
Read Directory
Format:
Readdir ($handle)
Description: Read an open file directory stream
Readdir ($hand);
Close Directory
Format:
Closedir ($handle)
Description: Closes an Open Directory stream
Example: Closedir ($hand);
http://www.bkjia.com/PHPjc/327325.html www.bkjia.com true http://www.bkjia.com/PHPjc/327325.html techarticle Introduction to Knowledge Points: 1. Determine if a file or directory exists bool copy code code is as follows: file_exists (string filename) 2. Get the file name copy code code as follows: BaseName (filepath) 3 ...
