Guide to using is_file() function in PHP, guide to using is_file_PHP tutorial

Guide to the use of is_file() function in PHP, guide to the use of is_file

The is_file() function checks whether the specified file name is a normal file.

is_file — Tells whether the filename is a regular file

Usage:
bool is_file ( string $filename ) $file is a required parameter
Returns TRUE if the file exists and is a normal file.

Let’s look at an example one:

<&#63;php
var_dump(is_file('a_file.txt')) . "\n";
var_dump(is_file('/usr/bin/')) . "\n";
&#63;>

The above example will output:
bool(true)
bool(false)

Example 2:

<&#63;php
function isfile($file){
return preg_match('/^[^.^:^&#63;^-][^:^&#63;]*.(&#63;i)' . getexts() . '$/',$file);
//first character cannot be . : &#63; - subsequent characters can't be a : &#63;
//then a . character and must end with one of your extentions
//getexts() can be replaced with your extentions pattern
}
function getexts(){
//list acceptable file extensions here
return '(app|avi|doc|docx|exe|ico|mid|midi|mov|mp3|
mpg|mpeg|pdf|psd|qt|ra|ram|rm|rtf|txt|wav|word|xls)';
}
echo isfile('/Users/YourUserName/Sites/index.html');
&#63;>

Example 3:

<&#63;php
function deletefolder($path)
{
if ($handle=opendir($path))
{
while (false!==($file=readdir($handle)))
{
if ($file<>"." AND $file<>"..")
{
if (is_file($path.'/'.$file))
{
@unlink($path.'/'.$file);
}
if (is_dir($path.'/'.$file))
{
deletefolder($path.'/'.$file);
@rmdir($path.'/'.$file);
}
}
}
}
}
&#63;>

This function will delete all files and folders.

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