c语言formatted string

c语言formatted string

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sprintf

(PHP 4, PHP 5, PHP 7, PHP 8)

sprintf — Return a formatted string

说明

sprintf ( string $format , mixed ...$values ) : string

Returns a string produced according to the formatting string format.

参数

format

The format string is composed of zero or more directives: ordinary characters (excluding %) that are copied directly to the result and conversion specifications, each of which results in fetching its own parameter.

A conversion specification follows this prototype: %[argnum$][flags][width][.precision]specifier.

Argnum

An integer followed by a dollar sign $, to specify which number argument to treat in the conversion.

Flags

Flag 说明

- Left-justify within the given field width; Right justification is the default

+ Prefix positive numbers with a plus sign +; Default only negative are prefixed with a negative sign.

(space) Pads the result with spaces. This is the default.

0 Only left-pads numbers with zeros. With s specifiers this can also right-pad with zeros.

'(char) Pads the result with the character (char).