Example usage of php scandir() function to exclude specific directories-PHP Tutorial-php.cn

Example usage of php scandir() function to exclude specific directories

怪我咯

Release： 2023-03-13 12:42:01

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scandir() returns an array of files and directories in the specified directory. If successful, return an array of files and directories. Returns FALSE on failure. If directory is not a directory, an E_WARNING level error is thrown.

Syntax

scandir(directory,sorting_order,context);

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Optional. Specifies the environment for directory handles.

Parameters	Description
directory	Required. Specifies the directories to be scanned.
sorting_order	##Optional. Specify the order of sorting. The default is 0, indicating ascending alphabetical order. If set to SCANDIR_SORT_DESCENDING or 1, it means sorting in descending alphabetical order. If set to SCANDIR_SORT_NONE, returns unsorted results.
context	context is a set of options that modify the behavior of directory streams.

Parameters

Description

directory

Required. Specifies the directories to be scanned.

sorting_order

##Optional. Specify the order of sorting. The default is 0, indicating ascending alphabetical order.

If set to SCANDIR_SORT_DESCENDING or 1, it means sorting in descending alphabetical order.

If set to SCANDIR_SORT_NONE, returns unsorted results.

context

context is a set of options that modify the behavior of directory streams.

Example:

The code is as follows:

<?php
print_r(scandir(&#39;test_directory&#39;));
?>

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The output is as follows:

Array
(
[0]=>.
[1]=>..
[2]=>1.txt
[3]=>2.txt
)

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In most cases, only this directory is needed The file list array is as follows:

Array
(
[0]=>1.txt
[1]=>2.txt
)

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It is usually solved by excluding "." or ".." array items:

The code is as follows:

<?php
functionfind_all_files($dir)
{
    $root = scandir($dir);
    
foreach
($rootas$value)
    {
        if($value === &#39;.&#39; || $value === &#39;..&#39;){
            
continue
;
        }
        if(is_file("$dir/$value")){
            $result[] = "$dir/$value";
            continue;
        }
        foreach(find_all_files("$dir/$value")as$value)
        {
            $result[] = $value;
            }
        }
    
return
$result;
    }
?>

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Another one This method uses the

array_difffunction to eliminate the array obtained by executing the scandir function: The code is as follows:

<?php
$directory=&#39;/path/to/my/directory&#39;;
$scanned_directory=array_diff(scandir($directory),array(&#39;..&#39;,&#39;.&#39;));
?>

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Normally code management will generate. svn file, or .htaccess and other files that restrict directory access permissions. So it is more convenient to filter through the array_diff function.

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