Description:
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Round and number_format seem to be rounding the same numbers in different ways, also the output of the "round" function does not match the example given in the php documentation. 

Round just seems to be always rounding up.  Number format seems to be rounding either up or down depending on the value of the number before the decimal point.  

In my php.ini I have changed precision = 14.

Reproduce code:
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echo "round 0.045 = " . round(0.045, 2) . "<br>";
echo "number format 0.045 = " . number_format(0.045, 2) . "<br><br>";
echo "round 0.055 = " . round(0.055, 2) . "<br>";
echo "number format 0.055 = " . number_format(0.055, 2) . "<br><br>";
echo "round 5.045 = " . round(5.045, 2) . "<br>";
echo "number format 5.045 = " . number_format(5.045, 2) . "<br><br>";
echo "round 5.055 = " . round(5.055, 2) . "<br>";
echo "number format 5.055 = " . number_format(5.055, 2) . "<br><br>";
echo "round 3.025 = " . round(3.025, 2) . "<br>";
echo "number format 3.025 = " . number_format(3.025, 2) . "<br><br>";
echo "round 4.025 = " . round(4.025, 2) . "<br>";
echo "number format 4.025 = " . number_format(4.025, 2) . "<br><br>";


Actual result:
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round 0.045 = 0.05
number format 0.045 = 0.05

round 0.055 = 0.06
number format 0.055 = 0.06

round 5.045 = 5.05
number format 5.045 = 5.04

round 5.055 = 5.06
number format 5.055 = 5.05

round 3.025 = 3.03
number format 3.025 = 3.02

round 4.025 = 4.03
number format 4.025 = 4.03