base64_encode

[acey99]

is there a function that exists that can dertmine if you used base64_encode ?

like isBase64(something)

& returns true/false ?

if not, how do I write one ?

[Weedpacket]

The [man]base64_encode[/man] manual page cites RFC2045, which describes the Base64 encoding format. It's pretty simple to write a function for: after stripping out any characters not in A-Za-z0-9+/= (especially line breaks, which should be present), there should be 0, 1, 2 or 3 = signs at the end (and only at the end), and the number of characters should be a multiple of 4.

[acey99]

so ...

function isBase64($iVal){
   $_tmp=preg_replace("/[^A-Z0-9\+\/\=]/i","",$iVal);
   return (strlen($_tmp) % 4 == 0 ) ? "y" : "n";
} # end function


[code=php] 


????????