source: extensions/edit_gmaps/admin/include/fonctions.php @ 9377

<?php 
  //
  // DECIMAL TO FRACTION
  //
  function dec2frac( $decimal ) {
    $decimal = (string)$decimal;
    $num = '';
    $den = 1;
    $dec = false;

    // find least reduced fractional form of number
    for( $i = 0, $ix = strlen( $decimal ); $i < $ix; $i++ )
    {
     // build the denominator as we 'shift' the decimal to the right
     if( $dec ) $den *= 10;

     // find the decimal place/ build the numberator
     if( $decimal{$i} == '.' ) $dec = true;
     else $num .= $decimal{$i};
    }
    $num = (int)$num;

    // whole number, just return it
    if( $den == 1 ) return $num;

    $num2 = $num;
    $den2 = $den;
    $rem  = 1;
    // Euclid's Algorithm (to find the gcd)
    while( $num2 % $den2 ) {
     $rem = $num2 % $den2;
     $num2 = $den2;
     $den2 = $rem;
    }
    if( $den2 != $den ) $rem = $den2;

    $ret1->Numerator =($num / $rem ) ;
        $ret1->Denominator=($den / $rem);

    // now $rem holds the gcd of the numerator and denominator of our fraction
    return $ret1;
  }

 
function dec2dms($value) { 
        $value= abs($value);
        $degrees= floor($value);
        $tmp=($value-$degrees)*60; 
        $minutes= floor($tmp); 
        $seconds= round(($tmp-$minutes)*6000)/100;
       
        $sec=  dec2frac($seconds);
 
        $ret[0]['Numerator'] =$degrees ;
        $ret[0]['Denominator'] = 1 ;        
        $ret[1]['Numerator']  =$minutes ;
        $ret[1]['Denominator']=1;  
        $ret[2]['Numerator']  =$sec->Numerator ;
        $ret[2]['Denominator']=$sec->Denominator;
  $ret[3]= " Deg: " . $degrees . " Min: " . $minutes . " Sec: " . $seconds."  " ;
        
return( $ret); 

}


/*
//Array ( 
[GPSLatitudeRef] => S 
[GPSLatitude] => 
Array ( [0] => 41/1 
[1] => 54/1 
[2] => 26543/3238 ) 
[GPSLongitudeRef] => E 
[GPSLongitude] => Array ( 
[0] => 146/1 
[1] => 21/1 
[2] => 61393/1729 ) ) 
*/

function toFraction($number){

echo  ($number)."<br />" ;
$numerator = 1; 
$denominator = 0; 
$reste1->min =$number;


for(  ; $numerator < 100; $numerator++){ 

$temp =   ($numerator / $number);
$reste=ceil($temp) - $temp;
echo "<br />
$reste --- $reste1->min " ; 
if ($reste<$reste1->min) {
        $reste1->numerator = $numerator;
        $reste1->min =$reste ;
        $reste1->denominator =$temp ;
}

    if(ceil($temp) - $temp == 0){ 
                $denominator = $temp;
                 break;
        } 
} 
echo "<br />". $reste1->numerator . " /  " .$reste1->denominator ;

return ($denominator > 0) ? $numerator . '/' . $denominator : false; 
} 

 function Parse_Fract( $f )
{
  $nd = explode( '/', $f );
  return $nd[0]/$nd[1];
}


function Parse_Lat_Lon( $arr )
{
  $v=0;
  $v += parse_fract( $arr[0] );
  $v += parse_fract( $arr[1] )/60;
  $v += parse_fract( $arr[2] )/3600;
  return $v;
}
?>