Prime Numbers

by: Yi Ho-Han

August 13, 2001

Version: 0.02b

Type: Full Script

Category: Math Functions

License: GNU General Public License

Description: This simple script generate prime numbers (2,3,5,7,11,13,17 ...) Using method recursive.

<? 
function check_prime_number ( $f ) { 

        $no = 0; 

        for( $b=2 ; $b<=$f ; $b++ )        { 

                for( $d=2 ; $d<$b ; $d++ )        { 
                        $res = $b / $d; 
                    if( $res!=1 && intval($res)==$res )        { 
                                $no=1; 
                                $d=$b; 
                       } 
                } 

            if( $no!=1 ) $result = $b; 
                $no=0; 
        } 

        if( $result == $f )        return 1; 
        else        return 0; 
} 

$result = check_prime_number(11); 
echo( $result ); 

?>

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