PHP vfprintf() Function
PHP vfprintf() Function
The vfprintf() function in PHP writes a formatted string to a specified output stream.
Syntax
vfprintf ( resource $handle , string $format , array $args )
Parameter
handle(required)- This parameter represents where to write the string.
format(required)- This parameter specifies the string and how to format the variables in it.
The conversion specification of this parameter follows the given prototype: %[flags][width][.precision]specifier.
Flags
| Flag | Description |
| - | Left-justify within the given field width and by default, it follows the right justification |
| + | It signifies the prefix positive numbers with a plus sign (+). By default, only negative is prefixed with a negative sign. |
| (space) | It pads the result with spaces. This is the default. |
| 0 | It only left-pads numbers with zeros. With “s” specifiers this can also right-pad with zeros. |
| (char) | It pads the result with the character (char). |
Width
It signifies an integer that states how many characters (minimum) this conversion should result in.
Precision
- e, E, f and F specifiers: The number of digits to be printed after the decimal point (by default, it is 6).
- g and G specifiers: The maximum number of significant digits to be printed.
- s specifier: It acts as a cutoff point, setting a maximum character limit to the string.
If the period is specified without an explicit value for precision, 0 is assumed.
Specifiers
| Specifier | Description |
| % | It represents a literal percent character, and no other argument is required. |
| B | In this, the argument is treated as an integer and presented as a binary number. |
| C | In this, the argument is treated as an integer and presented as the character with that ASCII. |
| D | In this, the argument is treated as an integer and presented as a (signed) decimal number. |
| E | In this, the argument is treated as scientific notation. The precision specifier stands for the number of digits after the decimal point. |
| E | It is like the “e” specifier, but it uses the uppercase letter. |
| F | The argument is treated as a float and presented as a floating-point number (locale aware). |
| F | The argument is treated as a float and presented as a floating-point number (non-locale aware). |
| G | It represents a general format. |
| G | Unlike the “g” specifier but it also uses E and F. |
| O | In this, the argument is treated as an integer and presented as an octal number. |
| S | In this, the argument is treated and presented as a string. |
| U | In this, the argument is treated as an integer and presented as an unsigned decimal number. |
| X | The argument is treated as an integer and presented as a hexadecimal number (with lowercase letters). |
| X | The argument is treated as an integer and presented as a hexadecimal number (with uppercase letters). |
Type Handling
| Type | Specifiers |
| String | S |
| Integer | d, u, c, o, x, X, b |
| Double | g, G, e, E, f, F |
args(optional)- This parameter represents an array with arguments inserted at the third, fourth, etc. %-sign in the format string.
Return
This function returns the length of the outputted string
Example 1
Output: The given text will be written at file text.txt.
432.000000321.000000
Example 2
Output
The number with 2 decimals: 213.00
The number with no decimals: 213