November 6, 2012

# Find ratio for any number of variables in php?

## Question by neha thamman

I want to find ratio for any number of variables in php.

For example: 1:2 10:100:50
30:90:120:150

How can I get such rations?

One way would be convert the values to decimal values and covert them to fraction.

I found a function that will do this: [Source]

``````function decToFraction(\$float) {
// 1/2, 1/4, 1/8, 1/16, 1/3 ,2/3, 3/4, 3/8, 5/8, 7/8, 3/16, 5/16, 7/16,
// 9/16, 11/16, 13/16, 15/16
\$whole = floor ( \$float );
\$decimal = \$float - \$whole;
\$leastCommonDenom = 48; // 16 * 3;
\$denominators = array (2, 3, 4, 8, 16, 24, 48 );
\$roundedDecimal = round ( \$decimal * \$leastCommonDenom ) / \$leastCommonDenom;
if (\$roundedDecimal == 0)
return \$whole;
if (\$roundedDecimal == 1)
return \$whole + 1;
foreach ( \$denominators as \$d ) {
if (\$roundedDecimal * \$d == floor ( \$roundedDecimal * \$d )) {
\$denom = \$d;
break;
}
}
return (\$whole == 0 ? '' : \$whole) . " " . (\$roundedDecimal * \$denom) . "/" . \$denom;
}
``````

Now

``````\$total = 1 / 2;
echo decToFraction(\$total);
``````

Or, you could use PEAR’s Math_Fraction [Source]

``````include "Math/Fraction.php";

\$fr = new Math_Fraction(1,2); //Put your variable like this

// print as a string
// output: 1/2
echo \$fr->toString();

// print as float
// output: 0.5
echo \$fr->toFloat();
``````

## Author: Nabin Nepal (Starx)

Hello, I am Nabin Nepal and you can call me Starx. This is my blog where write about my life and my involvements. I am a Software Developer, A Cyclist and a Realist. I hope you will find my blog interesting. Follow me on Google+