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Filling the integer part of PHP

I need to fill in the integer part with 0, the integer part must be at least two characters

str_pad( 2 ,2,"0",STR_PAD_LEFT);// 02 -> works str_pad( 22 ,2,"0",STR_PAD_LEFT);// 22 -> works str_pad( 222 ,2,"0",STR_PAD_LEFT);// 222-> works str_pad( 2. ,2,"0",STR_PAD_LEFT);// 2. -> fails -> 02. or 02 str_pad( 2.11 ,2,"0",STR_PAD_LEFT);// 2.11-> fails -> 02.11

Is there any simple code for this?

If the same is possible in Java, please

 double x=2.11; String.format("%02d%s", (int) x, String.valueOf(x-(int) x).substring(1))

not only ugly, but also prints 02.10999999999999988

edit for Java: Populating the integer part of Java

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5 answers

You can also use printf() functions to enter an integer:

Something like ( codepad ):

 <?php function pad($n) { $n = explode('.', (string)$n); if (2 === count($n)) { return sprintf("%02d.%d\n", $n[0], $n[1]); } return sprintf("%02d\n", $n[0]); } foreach (array(2, 22, 222, 2., 2.11) as $num) { echo pad($num); } // returns 02, 22, 222, 02, 02.11
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No, there is no easy way.

 function padIntegerPart($n, $len) { $intPart = (int)$n; return str_repeat('0', max(0, $len - 1 - floor(log($intPart, 10)))) . $n; }
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Quick fix: http://codepad.org/EXcbqGos

 $num = 2.11; echo str_pad( floor($num) ,2,"0",STR_PAD_LEFT).substr($num-floor($num), 1);

It will only work for non-negative numbers.

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If you want to find the result of 02.11 , try sprintf() :

 sprintf("%05.2f", 02.11); // Output: 02.11 ^ ^--- float precision |--- total string length sprintf("%07.2f", 02.11); // Output: 0002.11

Links that may help you:

http://us2.php.net/sprintf

Extra leading zeros when printing float using printf?

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Other:

 function my_str_pad ($input ,$pad_length, $pad_string) { $pad_length += strlen($input) - strlen(intval($input)); return str_pad($input, $pad_length, $pad_string, STR_PAD_LEFT); }

Next test:

 str_pad(2., 2, "0", STR_PAD_LEFT);// 2. -> fails -> 02. or 02

It does not work because str_pad is working on a string, but you entered a number with a decimal point, but without a decimal part, so it is considered an integer. If you want to save '.' use the following instead:

 str_pad("2.", 2, "0" , STR_PAD_LEFT);// 2. -> works
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