vfprintf

Name:vfprintf

Category:String

Programming Language:php

One-line Description:Writes the formatted string to the specified output stream.

Definition and usage

vfprintf() function writes the formatted string to the specified output stream (for example: a file or a database).

Unlike fprintf() , the parameters in vfprintf() are in the array. The array element will be inserted at the percent sign (%) symbol in the main string. This function is executed step by step. At the first % symbol, insert the first array element, at the second % symbol, insert the second array element, and so on.

Note: If the % symbol is more than the arg parameter, you must use placeholders. The placeholder is inserted into the % symbol and consists of a number and "\$". See Example 3.

Related functions:

fprintf()
printf()
sprintf()
vprintf()
vsprintf()

grammar

 vfprintf ( stream , format , argarray )

parameter	describe
stream	Required. Specifies where to write/output strings.
format	Required. Specifies the string and how to format the variables therein. Possible format values: %% - Returns a percent sign %b - binary number %c - Characters corresponding to ASCII value %d - Decimal number containing positive and negative signs (negative number, 0, positive number) %e - Use lowercase scientific notation (e.g. 1.2e+2) %E - Scientific notation using capitals (e.g. 1.2E+2) %u - Decimal number without signs (greater than or equal to 0) %f - Floating point number (local setting) %F - Floating point number (non-local setting) %g - shorter %e and %f %G - Shorter %E and %f %o - octal number %s - string %x - Hexadecimal number (lowercase letters) %X - Hexadecimal number (caps) Additional format value. Necessarily placed between % and letters (for example %.2f): + (Present + or - before the number to define the positive and negative nature of the number. By default, only negative numbers are marked, and positive numbers are not marked) ' (Specify what to use as padding, default is a space. It must be used with the width specifyer. For example: %'x20s (use "x" as padding)) - (Left adjustment variable value) [0-9] (Specify the minimum width of the variable value) .[0-9] (Specify the number of decimal places or maximum string length) Note: If you use multiple format values, they must be in the above order.
argarray	Required. An array with parameters that are inserted into the % symbol in the format string.

parameter

describe

stream

Required. Specifies where to write/output strings.

format

Required. Specifies the string and how to format the variables therein.

Possible format values:

%% - Returns a percent sign
%b - binary number
%c - Characters corresponding to ASCII value
%d - Decimal number containing positive and negative signs (negative number, 0, positive number)
%e - Use lowercase scientific notation (e.g. 1.2e+2)
%E - Scientific notation using capitals (e.g. 1.2E+2)
%u - Decimal number without signs (greater than or equal to 0)
%f - Floating point number (local setting)
%F - Floating point number (non-local setting)
%g - shorter %e and %f
%G - Shorter %E and %f
%o - octal number
%s - string
%x - Hexadecimal number (lowercase letters)
%X - Hexadecimal number (caps)

Additional format value. Necessarily placed between % and letters (for example %.2f):

+ (Present + or - before the number to define the positive and negative nature of the number. By default, only negative numbers are marked, and positive numbers are not marked)
' (Specify what to use as padding, default is a space. It must be used with the width specifyer. For example: %'x20s (use "x" as padding))
- (Left adjustment variable value)
[0-9] (Specify the minimum width of the variable value)
.[0-9] (Specify the number of decimal places or maximum string length)

Note: If you use multiple format values, they must be in the above order.

argarray

Required. An array with parameters that are inserted into the % symbol in the format string.