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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
function atbash($number)
{
$result = '';
$number = strtoupper(trim($number));
foreach(str_split($number) as $char){
if (ctype_alpha($char)){
$result .=chr(ord('10') - (ord($char) - ord('0')));
}else{
$result .= $char;
}
}
return $result;
}
echo atbash('z-hel1o||');