PHP numeric format. each three digits contain a comma, which can retain decimal places.

PHP numeric formatting. each three digits contain commas (,). decimals can be retained. to give the viewer a clearer and clearer number during quotation, you need to format the numbers in two ways, one is to write functions by myself, and the other is of course the built-in function. In fact, I prefer the built-in function .? First, the system is simple: stringnumber_format (float PHP number formatting. each three digits are added with a comma, and decimals can be retained.

In order to give the viewer a clearer and clearer number during the quote, you need to use number formatting. There are two methods: one is to write the function by yourself, and the other is of course the system's own, in fact, I prefer the built-in system.

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First, the system is simple:

String number_format (float number [, int decimals [, string dec_point, string thousands_sep]):

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View Code 1 echo number_format ('20140901 ');

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Output result: 169,856,420

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View Code 1 echo number_format ('20140901', 2 );

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Output result: 1,000,000.00

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View the code 1 echo number_format ('20140901', 2 ,',','.');

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Output result: 1.000.000, 00

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Let's look at the written functions:

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Function num_format ($ num) {if (! Is_numeric ($ num) {return false;} $ num = explode ('. ', $ num); // separate integers from decimals $ rl = $ num [1]; // the decimal part value $ j = strlen ($ num [0]) % 3; // Number of digits in the integer $ sl = substr ($ num [0], 0, $ j ); // Obtain the number of less than three digits in the front $ sr = substr ($ num [0], $ j); // Obtain the number of the full three digits in the back $ I = 0; while ($ I <= strlen ($ sr) {$ rvalue = $ rvalue. ','. substr ($ sr, $ I, 3); // three digits are extracted and then merged, separated by commas $ I = $ I + 3;} $ rvalue = $ sl. $ rvalue; $ rvalue = substr ($ rvalue, 0, strlen ($ rvalue)-1); // remove the last comma $ r Value = explode (',', $ rvalue); // break it into an array if ($ rvalue [0] = 0) {array_shift ($ rvalue ); // if the first element is 0, delete the first element} $ rv = $ rvalue [0]; // for ($ I = 1; $ I <count ($ rvalue); $ I ++) {$ rv = $ rv. ','. $ rvalue [$ I];} if (! Empty ($ rl) {$ rvalue = $ rv. '. '. $ rl; // The decimal place is not empty. the integer and decimal places are merged.} else {$ rvalue = $ rv; // The decimal place is empty. only the integer} return $ rvalue ;}

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