Description:
------------
Running the test script below tries to format a number using
%d %e $f and %g formats in sprintf

However the output is blank for %g format

It appears %g isn't supported

Output:
15.5 d value is 15
15.5 e value is 1.55000e+1
15.5 f value is 15.500000
15.5 g value is 
0.5 d value is 0
0.5 e value is 5.00000e-1
0.5 f value is 0.500000
0.5 g value is 
155 d value is 155
155 e value is 1.55000e+2
155 f value is 155.000000
155 g value is 


Test script:
---------------
<?php
        echo "15.5 d value is ",sprintf('%d',15.5),"\n";
  	echo "15.5 e value is ",sprintf('%e',15.5),"\n";
  	echo "15.5 f value is ",sprintf('%f',15.5),"\n";
  	echo "15.5 g value is ",sprintf('%g',15.5),"\n";
  	echo "0.5 d value is ",sprintf('%d',0.5),"\n";
  	echo "0.5 e value is ",sprintf('%e',0.5),"\n";
  	echo "0.5 f value is ",sprintf('%f',0.5),"\n";
  	echo "0.5 g value is ",sprintf('%g',0.5),"\n";
  	echo "155 d value is ",sprintf('%d',155),"\n";
  	echo "155 e value is ",sprintf('%e',155),"\n";
  	echo "155 f value is ",sprintf('%f',155),"\n";
  	echo "155 g value is ",sprintf('%g',155),"\n";
?>

Expected result:
----------------
Expecting %g format to output similar to the C sprintf function

example:

15.5 g value is 15.5
0.5 g value is 0.5
155 g value is 155