I'm trying to append a number of NULL characters '\0' to a string in PHP.
$s = 'hello';
while(strlen($s) < 32) $s .= '\0';
However, PHP adds 2 characters (\ and 0), instead of escaping the character and adding NULL. Does anyone know to add a NULL character to a string?
I don't know if \0 is correct in your case, but you should use ":
$s = 'hello';
while(strlen($s) < 32) $s .= "\0";
Caused by ' you should use ".
Using simple quote PHP doesn't interpret code or special char like (\n\r\0), by using double quote PHP will.
This appears to work:
$result = str_pad($str, 32, "\0");
echo strlen($result); // output: 32
Try the following code
echo $str="Hello ";
echo ' Length : '.strlen($str);
while(strlen($str)<32)
{
$str.=' ';
}
echo '<br/>';
echo $str;
echo ' Length : '.strlen($str);
Hope this will solve your problem
Just the following line is enough:
$s = pack('a32', 'hello');
.= null;maybe? Will result in an endless loop though.str_pad($s, 32, "\0");