Quicker String Verification

Jay · 12-12-2007, 07:49 AM

I thought of a way to validate string length earlier today, and when I went to go benchmark it, it proved to be faster/more efficient than using strlen.

My method:

PHP Code:


			
// We want strings less than or equal to 32 characters
if( isset( $string[32] ) )
{
    // Failed! This string is 33 characters! (arrays are 0 indexed, so 32 characters is index 31, and 33 is index 32!)
}

After ten-thousand iterations, it proved to only be 0.001500s, where as:

PHP Code:


			
if( strlen( $string ) > 32 )
{
    // Failed! This string is 33+ characters!
}

Took about 0.006000s

So as I see it, using my method proves to be very efficient (3x's faster than strlen). Any objections, comments, or complaints before I state this as a standard in my mind?