printf

Name:printf

Category:String

Programming Language:php

One-line Description:Output a formatted string.

Definition and usage

printf() function outputs a formatted string.

The arg1 , arg2 , arg++ parameters will be inserted at the percent sign (%) symbol in the main string. This function is executed step by step. At the first % symbol, insert arg1 , at the second % symbol, insert arg2 , 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 2.

Related functions:

fprintf()
sprintf()
vfprintf()
vprintf()
vsprintf()

grammar

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

parameter	describe
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 specifier.) - (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 above, they must be used in the order above and cannot be disrupted.
arg1	Required. Specifies the parameters inserted into the first % symbol in the format string.
arg2	Required. Specifies the parameter inserted into the second % symbol in the format string.
arg++	Optional. Specifies the parameters inserted into the third, fourth, etc. % symbols in the format string.