File operation of PHP SPL standard library_PHP tutorial

File operation of PHP SPL standard library

This article mainly introduces the file operation (SplFileInfo and SplFileObject) examples of PHP SPL standard library. This article explains how SplFileInfo is used to obtain file details. Information, SplFileObject traversal, search for specified lines, writing to csv files, etc. Friends who need it can refer to it

PHP SPL provides two classes, SplFileInfo and SplFileObject, to handle file operations.

SplFileInfo is used to obtain file details:

The code is as follows:

$file = new SplFileInfo('foo-bar.txt');

print_r(array(

　'getATime' => $file->getATime(), //Last access time

　'getBasename' => $file->getBasename(), //Get basename without path

　'getCTime' => $file->getCTime(), //Get the inode modification time

　'getExtension' => $file->getExtension(), //File extension

'getFilename' => $file->getFilename(), //Get the file name

　'getGroup' => $file->getGroup(), //Get the file group

　'getInode' => $file->getInode(), //Get file inode

'getLinkTarget' => $file->getLinkTarget(), //Get the file link target file

'getMTime' => $file->getMTime(), //Get the last modified time

'getOwner' => $file->getOwner(), //File owner

　'getPath' => $file->getPath(), //File path without file name

　'getPathInfo' => $file->getPathInfo(), //SplFileInfo object of the superior path

'getPathname' => $file->getPathname(), //Full path

'getPerms' => $file->getPerms(), //File permissions

　'getRealPath' => $file->getRealPath(), //Absolute file path

　'getSize' => $file->getSize(),//File size in bytes

　'getType' => $file->getType(),//File type file dir link

　'isDir' => $file->isDir(), //Whether it is a directory

'isFile' => $file->isFile(), //Whether it is a file

　'isLink' => $file->isLink(), //Whether it is a shortcut link

'isExecutable' => $file->isExecutable(), //Whether it is executable

'isReadable' => $file->isReadable(), //Whether it is readable

'isWritable' => $file->isWritable(), //Writable or not

　));

SplFileObject inherits SplFileInfo and implements the RecursiveIterator and SeekableIterator interfaces, which are used to traverse, search, and operate files

Traversal:

The code is as follows:

try {

foreach(new SplFileObject('foo-bar.txt') as $line) {

echo $line;

　}

　} catch (Exception $e) {

echo $e->getMessage();

　}

Find the specified line:

The code is as follows:

try {

$file = new SplFileObject('foo-bar.txt');

$file->seek(2);

echo $file->current();

　} catch (Exception $e) {

echo $e->getMessage();

　}

Write to csv file:

The code is as follows:

　$list = array (

　array( 'aaa' , 'bbb' , 'ccc' , 'dddd' ),

array( '123' , '456' , '7891' ),

array( '"aaa"' , '"bbb"' )

　);

　$file = new SplFileObject ( 'file.csv' , 'w' );

　foreach ( $list as $fields ) {

　$file -> fputcsv ( $fields );

　}