(PHP 5 >= 5.1.2, PHP 7)
SplFileInfo::isReadable — Tells if file is readable
public SplFileInfo::isReadable ( ) : bool
Check if the file is readable.
This function has no parameters.
 Returns true if readable, false otherwise. 
Example #1 SplFileInfo::isReadable() example
<?php
$info = new SplFileInfo(__FILE__);
var_dump($info->isReadable());
$info = new SplFileInfo('foo');
var_dump($info->isReadable());
?> The above example will output something similar to:
bool(true) bool(false)
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    https://www.php.net/manual/en/splfileinfo.isreadable.php