<?php
function IsOcta($string){
(int) $x=octdec("$string"); // Input must be a String and octdec returns NUMBER
$y=decoct($x); // Must be a Number and decoct returns STRING
if($string==$y){
return true;
}else{
return false;
}
}
$octal = 010;
var_dump(IsOcta($octal));
Deprecated: Invalid characters passed for attempted conversion, these have been ignored in /in/DvFdb on line 4
bool(false)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Deprecated: Invalid characters passed for attempted conversion, these have been ignored in /in/DvFdb on line 4
bool(false)