Copy Move Files - PHP

A simple example of imitating elFinder and extracting key member methods
The implemented function is:
Implement multiple file copy or move operations

Note: In order to facilitate testing, some judgments have been briefly processed. And it will be in the directory where the program file is located
Create a new test folder as the destination folder. Modification is required if actual use is required.

?/**
 * Simple example of copy/move operation: >PHP5
 *
*/
/**
 * Determine whether the file exists
 *
*/
function _isFind($filename) {
 return @file_exists($filename);
}

/* *
 * Determine whether the folder exists? Simple processing: only determine the root directory
 *
*/
function _isFindDir($dir) {
 $ls = scandir(dirname(__FILE__));
 foreach ($ls as $val) {
 if ($val == $dir) return TRUE;
 }
 return FALSE;
}

/**
 * Copy or move
 *
 * @param array Source folder array: Simple processing: use the file name as the element value
 * @param string Destination folder
 * @param string Operands: move - move; copy - copy
 * @return bool
*/
function _copy_move($src = array(), $dst = '', $op = 'move') {
 if ( ! is_array($src )) {
 $src = array($src);
 }

 //Determine whether the source file exists?
 foreach ($src as $val) {
 if ( _isFind($val) === FALSE) {
 return _log('Src file not find', $val);
 }
 }

 //Determine whether the destination folder exists? If it does not exist, generate it
 //Simple processing: Actual application needs to be modified
 if (_isFindDir($ dst) === FALSE) {
 @mkdir($dst);
 }

 //Perform a move or copy operation
 foreach ($src as $val) {
 $_dst = $dst.'/'.basename( $val);

 //Determine whether the destination file exists? Operation is not allowed if it exists
 if (_isFind($_dst) === TRUE) {
 return _log('Dst file is exists', $dst);
 } else if (strpos($dst, $val) === 0) {
 return _log('Unable to copy/move into itself');
 }

 if (strtolower($op) === 'move') {
 if ( ! rename($val, $_dst)) {
 return _log('Unable to move files', $val);
 }
 } else if (strtolower($op) === 'copy') {
 if ( ! _copy($val, $_dst)) {
 return _log('Unable to copy files', $val);
 }
 }
 }
 return 'Success!';
}

/**
 * Copy operation
 *
*/
function _copy($src, $dst) {
 if ( ! is_dir($src)) {
 if ( ! copy($src, $dst)) {
 return _log('Unable to copy files' , $src);
 }
 } else {
 mkdir($dst);
 $ls = scandir($src);

 for ($i = 0; $i < count($ls); $i++) {
 if ($ls[$i] == '.' OR $ls[$i] == '..') continue;

 $_src = $src.'/'.$ls[$i];
 $_dst = $dst.'/'.$ls[$i];

 if ( is_dir($_src)) {
 if ( ! _copy($_src, $_dst)) {
 return _log('Unable to copy files', $_src);
 }
 } else {
 if ( ! copy($_src, $_dst)) {
 return _log('Unable to copy files', $_src);
 }
 }
 }
 }
 return TRUE;
}

/**
 * Logging
 *
*/
function _log($msg, $arg = '') {
 if ($arg != '') {
 $msg = "date[" .date('Y-m-d H:i:s')."]tmsg[".$msg."]targ[".$arg."]n";
 } else {
 $msg = "date[".date ('Y-m-d H:i:s')."]tmsg[".$msg."]n";
 }
 echo $msg;
 return @file_put_contents('copy.log', $msg, FILE_APPEND);
 }

/**
 * Example
 * 1. The array parameter of $src needs to be modified; 2. The third parameter of _copy_move can be modified to test the move/copy operation respectively
 *
*/
$src = array('img', 'min', 'phpinfo.php');
$dst = 'test';
var_dump(_copy_move($src, $dst , 'copy'));

/*end of php*/