PHP number three-bit comma-plus functional function _php tips

PHP implementation of the number format, the number of three-bit comma function function, the specific code is as follows:

function Num_format ($num) { 
 if (!is_numeric ($num)) {return 
  false; 
 } 
 $num = Explode ('. ', $num);/to separate integers and decimals 
 $rl = $num [1];//Fractional part value 
 $j = strlen ($num [0])% 3;//integer number 
 $SL = substr ($ Num[0], 0, $j)//Before the number of three digits out 
 $SR = substr ($num [0], $j), and/or after three-digit number 
 $i = 0; 
 while ($i <= strlen ($SR)) { 
  $rvalue = $rvalue. ', '. substr ($SR, $i, 3);//three-bit three-bit removed and merged, separated by commas 
  $i = $i + 3; 
 } 
 $rvalue = $sl. $rvalue; 
 $rvalue = substr ($rvalue, 0,strlen ($rvalue)-1)//Remove the last comma 
 $rvalue = explode (', ', $rvalue);//decompose the array of 
 if ($ rvalue[0]==0) { 
  array_shift ($rvalue);//If the first element is 0, delete the first element 
 } 
 $rv = $rvalue [the number of less than three digits in front of 0];//= for 
 ($i = 1; $i < count ($rvalue); $i + +) { 
  $rv = $rv. ', '. $rvalue [$i]; 
 } 
 if (!empty ($RL)) { 
  $rvalue = $rv. '. ' $RL//decimal is not null, integer and decimal merge 
 }else{ 
  $rvalue = $RV;//Decimal is empty, only integer 
 } return 
 $rvalue; 

You can also use the system's self-contained function string Number_format (float number [, int decimals [, String Dec_point, String thousands_sep]]):

Example:

the output will be:169,856,420

echo Number_format (' 1000000 ', 2); 

the output will be:1,000,000.00

echo Number_format (' 1000000 ', 2, ', ', '. '); 

the output will be:1.000.000,00

The above is the PHP implementation of the number of every three comma code, just beginning to see the topic is not no ideas, small series is also, hope that through this article can give you some inspiration.