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This article will explain in detail what are the file manipulation functions in PHP. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

File operation function

Opendir (path): open a path resource (read all data inside the path into memory)

Readdir (path resource): reads the name of the file pointed to by the current resource pointer from the folder resource, and the pointer moves down one bit.

Closedir (resources): release the corresponding file resources

Scandir (path): reads all the file names within a path and returns an array. Each element of the array is a file name.

File_exists: determine whether a file exists (in a broad sense: path and file)

Is_dir: determines whether a specified path exists (folder)

Is_file: determines whether a specified path is a file (file)

Mkdir: create a path that will report an error if it exists

Rmdir: removing folder

File_get_contents: reads the data contents from a specified file.

File_put_contents: writes the specified string to the corresponding file

Fopen: open a file resource

Fgetc:c stands for character, reading one character at a time

Fgets:s stands for string, which means that multiple characters can be read, depending on the specified read length or whether a newline is encountered (a maximum of one row of data can be read)

Both functions operate on the current resource pointer, and both move the pointer down after reading

Fread: gets the specified length of data until the end of the file

Fwrite: writes data to the location of the file resource pointer. Writing will not move back what already exists in the current location, but will overwrite it.

Fseek: assign the pointer to the corresponding location

Fclose: use the corresponding file resources

Copy: copyin

Unlink: deleting fil

Rename: renaming fil

Filemtime:m stands for modify, and the last time the file was modified

Filesize: file size (bytes)

Fileperms: file permissions (octal under Linux)

What language is php php, a nested acronym, is the abbreviation of English Hypertext preprocessing language (PHP:Hypertext Preprocessor). PHP is a kind of HTML embedded language. PHP is somewhat similar to Microsoft's ASP. It is a scripting language that embeds HTML documents on the server. The style of the language is similar to C language, and now it is widely used by many website programmers.

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