Php file operation function details. Php provides a large number of file operation functions. below I will summarize the php file functions for file reading and writing operations. For more information about these functions, see. Php provides a large number of functions for file operations. I will summarize the operations of php file functions on file reading and writing, for more information about these functions, see.
1. operate on files to obtain file information
| The code is as follows: |
|
// Open the file
$ File_path = "text.txt ";
If ($ fp = fopen ($ file_path, "r ")){
// Retrieve the file information
$ File_info = fstat ($ fp );
Echo" "; print_r($file_info); echo " "; // Single fetch
$ File_size = $ file_info ['size'];
// The file size is calculated in bytes.
Echo "file size:". $ file_size;
Echo"
Last file access time :". date ("Y-m-d H: I: s", $ file_info ['atime ']); // atime indicates the time when the file was last accessed]
Echo"
Last File Modification time :". date ("Y-m-d H: I: s", $ file_info ['mtime']); // mtime indicates the time when the last file content was modified]
Echo"
Last File change time :". date ("Y-m-d H: I: s", $ file_info ['ctime']); // ctime indicates the time when the last File owner/file Group of the file was modified] } Else {
Echo "failed to open the file ";
}
// Close the file. this is very important.
Fclose ($ fp );
?> |
2. Method 2 for obtaining file information
| The code is as follows: |
|
// Obtain the file information
$ File_path = "text.txt ";
If (! File_exists ($ file_path )){
Echo "the file does not exist ";
Exit ();
} Echo"
". Date (" Y-m-d H: I: s ", fileatime ($ file_path ));
Echo"
". Date (" Y-m-d H: I: s ", filemtime ($ file_path ));
Echo"
". Date (" Y-m-d H: I: s ", filectime ($ file_path )); // Echo"
". Filemtime ($ file_path );
// Echo"
". Filectime ($ file_path );
?> |
II. file read operations
| The code is as follows: |
|
// Read the file
$ File_path = "text.txt "; If (! File_exists ($ file_path )){
Echo "the file does not exist ";
Exit ();
}
// Open the file
$ Fp = fopen ($ file_path, "a + ");
// Read the file
$ Content = fread ($ fp, filesize ($ file_path ));
Echo "file content is:
";
// By default, after the content is output to the webpage, it is not displayed with line breaks because the webpage does not recognize rn.
// All rn =>
$ Content = str_replace ("rn ","
", $ Content );
Echo $ content; Fclose ($ fp );
?>
|
2. Method 2 for reading files
| The code is as follows: |
|
// Method 2
$ File_path = "text.txt ";
If (! File_exists ($ file_path )){
Echo "the file does not exist ";
Exit ();
}
$ Content = file_get_contents ($ file_path ); $ Content = str_replace ("rn ","
", $ Content );
Echo $ content;
?>
|
3. The third method is to read data cyclically (to deal with large files)
| The code is as follows: |
|
// The third method for reading (dealing with large files)
$ File_path = "text.txt ";
If (! File_exists ($ file_path )){
Echo "the file does not exist ";
Exit ();
} // Open the file
$ Fp = fopen ($ file_path, "a + ");
// Define the number of bytes read each time
$ Buffer = 1024;
// Read one side. While determining whether it reaches the end of the file
While (! Feof ($ fp )){
// Read data by 1024 bytes
$ Content = fread ($ fp, $ buffer );
Echo $ content;
} Fclose ($ fp );
?>
|
4. file reading application: when we connect to the database, we can configure the specified data to a file, and then obtain information in real time when PHP is running.
| The code is as follows: |
|
Db. ini file Host = 127.0.0.1
User = root
Pwd = root
Db = test |
Get file
| The code is as follows: |
|
$ Arr = parse_ini_file ("db. ini ");
Echo" "; print_r($arr); echo " ";
Echo $ arr ['host']; // Connect to the database
$ Conn = mysql_connect ($ arr ['host'], $ arr ['user'], $ arr ['pwd']); If (! $ Conn ){
Echo "error ";
} Echo "OK ";
?> |
III. file writing
| The code is as follows: |
|
// Write an object
$ File_path = "text.txt ";
If (! File_exists ($ file_path )){
Echo "the file does not exist ";
Exit ();
}
// "A +" append "w +" to the end of the file to re-write $ Fp = fopen ($ file_path, "w + ");
$ Con = "rn Hello ";
For ($ I = 0; $ I <10; $ I ++ ){
Fwrite ($ fp, $ con );} Echo "added successfully ";
Fclose ($ fp );
?> |
2. The second method uses the file_put_contents function.
| The code is as follows: |
|
// Method 2
$ File_path = "text.txt ";
$ Content = "hello, worldrn ";
// Write a string to the file. the default value is [FILE_USE_INCLUDE_PATH] "w +" re-write.
File_put_contents ($ file_path, $ content, FILE_APPEND ); Echo "OK ";
?> |
Refer file functions for reading and writing files. For more information about these functions, see ....
