Round numbers with long floating in php

Question

5.6063031659674E-8
0.049384616190426
0.041345497234064
0.013279709725645
0.3620935249019
4.5741615668742E-6
0.0454423017838
9.6445838196105E-6
3.1555173304188E-7
5.8474349007938E-7
1.8171531995817E-5
0.0015936353073957
9.9344709993503E-8
1.3762311862235E-6
0.01668723044222
0.00015548477586444
1.3631509003722E-7
0.00016099844756336
2.2468529825075E-6
7.1749367787711E-6
1.3941796415447E-7
1.4811123370548E-11

I tries number_format or round functions but results are wrong , the proper result would be this :

Possible duplicate of [Set precision for a float number in PHP](https://stackoverflow.com/questions/19875583/set-precision-for-a-float-number-in-php) — Derek Pollard, Jun 12 '18 at 17:26
If that is so please do that in a demo and show me you can do that with number_format ! look at the E- part , I myself think the only possible way is to cut it and act as it is a string not a number !?! — Mac Taylor, Jun 12 '18 at 17:28
https://eval.in/1019979 , this demo , if you put a number from the question on this demo , you can see , it returns error. — Mac Taylor, Jun 12 '18 at 17:31
What are you actually trying to accomplish here, and why? You cannot simply discard the exponent part of the number without completely destroying what your data represents. — Sammitch, Jun 12 '18 at 18:05

score -1 · Answer 1 · answered Jun 12 '18 at 17:32

-1

Try the following, because I think all other math related functions will not give the result you want.

$str =(string) 5.6063031659674E-8; $str = substr($str,0,6);

answered Jun 12 '18 at 17:32

Sugumar Venkatesan

4,019
8
46
77

yeah right , I said it in the comment , but thanks for the answer . – Mac Taylor Jun 12 '18 at 17:46
1

`5.60630` and `5.60630E-8` are *Vastly* different numbers, and this is a comically bad idea. – Sammitch Jun 12 '18 at 18:00
you have a better idea ?! – Mac Taylor Jun 12 '18 at 18:02
@Sammitch this is what he wants. and this is mentioned in the question – Sugumar Venkatesan Jun 12 '18 at 18:03
1

@Sammitch's comment should probably be addressed to the question itself, not the answer. – Barmar Jun 12 '18 at 18:04
But maybe it's not worthwhile answering such an obviously misguided question. – Barmar Jun 12 '18 at 18:04
@MacTaylor You need to think about whether what you want is reasonable to begin with. Why is `5.60630` the correct result? – Barmar Jun 12 '18 at 18:05

Round numbers with long floating in php

1 Answers1