How to create, open, read, write and close files with PHP
This article mainly introduces how PHP to create, open, read, write and close file operations, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.
Open file: use the open () function to open the file, and the second parameter specifies the mode of opening the file, such as read (r).
Read the file: use the fread () function to read the open file, and the second parameter specifies the maximum number of bytes to be read.
Close files: it is a good programming practice to use the fclose () function to close open files and close them when you are done with them.
$myfile = fopen ('testfile.txt', 'r') or die (' Unable to open fileholders'); echo fread ($myfile, filesize ('testfile.txt')); fclose ($myfile)
Create a file: when you use the fopen () function to open a file that does not exist, this function creates a file if the file mode is write (w) or add (a).
Write to the file: use the fwrite () function to write to the file, and the second argument is the string being written.
Overwrite file: when writing a file using the fwrite () function, if the file mode is write (w), all existing data will be erased and start with a new file.
Append file: when writing a file using the fwrite () function, if the file mode is added (a), all existing data will be retained and the file pointer starts at the end of the file.
$myfile = fopen ("newfile.txt", "a") or die ("Unable to open file!"); $txt = "Bill Gates is one of the richest people.\ n"; fwrite ($myfile, $txt); $txt = "Steve Jobs is the CEO of Apple.\ n"; fwrite ($myfile, $txt); fclose ($myfile) Thank you for reading this article carefully. I hope the article "how to create, open, read, write and close files in PHP" shared by the editor will be helpful to everyone. At the same time, I hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!
