I would like to truncate numbers at 3 decimals with php :
3.236665 3.236
3.236111 3.236
Thanks
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`round(3.236665, 3) === 3.237`. – Bartosz Zasada Nov 04 '16 at 08:24
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wrong, I dont want to round the number but to truncate it – mlwacosmos Nov 04 '16 at 08:35
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Try this man, $value = explode('.',$value*1000)[0] / 1000; Just parse to float if you want it to be float. – AFwcxx Apr 18 '18 at 02:12
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And BTW, this is not a duplicate question as suggested by @Rizier123. Definitely a separate case. Perhaps understand the case before taking action. – AFwcxx Apr 18 '18 at 02:13
1 Answers
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To truncate a number up to p decimals, multiply the number by p-th power of 10, truncate the fraction by casting to integer, then divide the result by p-th power of 10.
The following truncates $n up to the 3rd decimal:
intval($n * 1e3) / 1e3;
Ruslan Osmanov
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2I would like to say this solution is mostly accurate but there exceptions where the result is wrong. Example : if $n = 1.005, int ($n * 1e3) = 1004 and not 1005 due to float approximation – mlwacosmos Nov 15 '16 at 15:36