How to determine how many files there are in a directory in php

php method to determine how many files there are in a directory: 1. Use the scandir() function to get the names of files and folders in the directory, which will return an array containing the names of files and folders; 2. Use "count(array)-2" statement to get the number of files in the directory.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use scandir() and The count() function determines how many files there are in the directory.

Example:

There is an img directory with 8 picture files in it

Implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
$dir = &#39;./img&#39;;
if(is_dir($dir)){
    $arr = scandir($dir);
}
var_dump($arr);

$len=count($arr)-2;
echo "指定img目录上的文件数目：".$len;
?>

Description:

scandir() The function can list the names of files and folders in the specified directory, scandir () The syntax format of the function is as follows:

scandir(string $directory[, int $sorting_order[, resource $context]])

The parameter description is as follows:

• $directory: the directory to be read;
• $sorting_order: is Optional parameter, used to set the default sorting method;
  • If set to SCANDIR_SORT_DESCENDING or 1, the returned results will be sorted in descending alphabetical order;
  • If set to SCANDIR_SORT_NONE, the returned results will not be sorted the result of.
• $context: is an optional parameter that specifies the environment of the directory handle. $context is a set of options that modify the behavior of directory streams.

scandir() function will return an array containing file and folder names if executed successfully. If the execution fails, it will return FALSE. If the parameter $directory is not a directory, the Boolean value FALSE is returned and an E_WARNING level error is generated.

count() The function can count the number of all elements in the array, or the number of attributes in the object.

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