PHP number format, number every three bits plus a comma, you can keep decimals

In order to give the visitors more clear and clear figures in the quotation, so need to use the number format, there are two methods, one of their own write function, the other of course is the system comes with, in fact, I prefer the system comes with.

First come the system simple:

String Number_format (float number [, int decimals [, String Dec_point, String thousands_sep]):

View Code 1 Echo number_format (' 169856420 ');

The output will be: 169,856,420

View Code 1 Echo number_format (' 1000000 ', 2);

The output will be: 1,000,000.0

View Code 1 Echo number_format (' 1000000 ', 2, ', ', '. ');

The output will be: 1.000.000,00

Again read the function:

function Num_format ($num) {if (!is_numeric ($num)) {return false; } $num = Explode ('. ', $num);//separates integers and decimals $rl = $num [value of 1];//fractional part $j = strlen ($num [0])% 3;//integer how many bits $sl = su       A BSTR ($num [0], 0, $j);//The number of the front less than three bits is taken out to $SR = substr ($num [0], $j);//The number of full three digits after it is taken out to $i = 0;      while ($i <= strlen ($SR)) {$rvalue = $rvalue. ', '. substr ($SR, $i, 3);//three-bit three-bit remove and merge, separated by commas $i = $i + 3;      } $rvalue = $sl. $rvalue; $rvalue = substr ($rvalue, 0,strlen ($rvalue)-1);//Remove the last comma $rvalue = explode (', ', $rvalue);//Decompose the array if ($rvalue [0]= =0) {array_shift ($rvalue);//If the first element is 0, delete the first element} $RV = $rvalue [0];//front less than three digits for ($i = 1; $i < Coun T ($rvalue);       $i + +) {$rv = $rv. ', '. $rvalue [$i]; } if (!empty ($RL)) {$rvalue = $rv. '. '.  $RL;//decimal is not empty, integer and decimal merge}else{$rvalue = $RV;//Decimal is empty, only integer} return $rvalue; }

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