if in line php code example

Example 1: filesize in php

$file = '/path/to/your/file';
$filesize = filesize($file); // bytes
$filesize = round($filesize / 1024 / 1024, 1); // megabytes with 1 digit
 
echo "The size of your file is $filesize MB.";

Example 2: if is alphabet php

ctype_alpha ( string $text ) : bool