How to convert 1 to 01 in php

In PHP, you can use the sprintf() function to convert "1" into "01". This function can write the formatted string into a variable when the parameter is set to "d" You can pad zeros in a string with the syntax "sprintf(" d",1)".

The operating environment of this tutorial: windows10 system, PHP7.1 version, DELL G3 computer

How to convert 1 in php to 01

sprintf() function writes a formatted string into a variable.

arg1, arg2, parameters will be inserted into the main string at the percent sign (%) symbol. This function is executed step by step. At the first % sign, insert arg1, at the second % sign, arg2, and so on.

The syntax is:

sprintf(format,arg1,arg2,arg++)

The parameters are expressed as follows:

format Required. Specifies a string and how to format variables within it.

Possible format values:

• ##%% - Returns a percent sign %

##%b - Binary number
%c - The character corresponding to the ASCII value
%d - The decimal number containing the sign (negative number, 0, positive number)
%e - Use lowercase scientific notation (e.g. 1.2e 2)

• ##%E - Use uppercase scientific notation (e.g. 1.2 E 2)

• %u - Decimal number without sign (greater than or equal to 0)

• %f - Floating point number (local settings)

• %F - floating point (non-native settings)

• %g - shorter %e and %f

• %G - shorter %E and %f

• ##%o - octal number

• %s - String

• %x - Hexadecimal number (lower case letters)

• %X - Hexadecimal number (upper case letters)

• Additional format value. Must be placed between % and a letter (e.g. %.2f):

(Add or - in front of the number to define the sign of the number. By default, only negative numbers are mark, positive numbers are not marked)

• ' (specifies what to use as padding, the default is spaces. It must be used with the width specifier. For example: %'x20s (use " x" as padding))

• - (left adjustment variable value)

• [0-9] (specifies the minimum width of the variable value)

• .[0-9] (Specify the number of decimal places or the maximum string length)

• Note: If you use more than one of the above formats Values, they must be used in the order above and cannot be disrupted.

arg1 Required. Specifies the parameters to be inserted at the first % symbol in the format string.

arg2 Optional. Specifies the parameters to be inserted into the format string at the second % symbol.

arg Optional. Specifies the parameters to be inserted into the format string at the third, fourth, etc. % symbols.

The example is as follows:

<?php
  $s1=sprintf("%02d",1);
  $s2=sprintf("%02d",2);
  echo $s1 ,"<br>";
  echo $s2;
?>

Output result:

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