PHP fprintf() Function
 Complete PHP String Reference
Definition and Usage
The fprintf() function writes a formatted string to a
specified output stream (example: file or database).
The arg1, arg2, ++ parameters will be inserted at percent (%)
signs in the main string. This function works "step-by-step". At the first % sign,
arg1 is inserted, at the second % sign, arg2 is inserted, etc.
The fprintf() function returns the length of the written string.
Syntax
fprintf(stream,format,arg1,arg2,arg++)
|
| Parameter |
Description |
| stream |
Required. Specifies where to write/output the string |
| format |
Required. Specifies the string and how to format the
variables in it. Possible format values:
- %% - Returns a percent sign
- %b - Binary number
- %c - The character according to the ASCII value
- %d - Signed decimal number
- %e - Scientific notation (e.g. 1.2e+2)
- %u - Unsigned decimal number
- %f - Floating-point number (local settings aware)
- %F - Floating-point number (not local settings
aware)
- %o - Octal number
- %s - String
- %x - Hexadecimal number (lowercase letters)
- %X - Hexadecimal number (uppercase letters)
Additional format values. These are placed between the % and the letter
(example %.2f):
- + (Forces both + and - in front of numbers. By
default, only negative numbers are marked)
- ' (Specifies what to use as padding. Default is space. Must be used
together with the width specifier.
Example: %'x20s (this uses "x" as padding)
- - (Left-justifies the variable value)
- [0-9] (Specifies the minimum width held of to the variable value)
- .[0-9] (Specifies the number of decimal digits or maximum
string length)
Note: If multiple additional format values are used, they must be in the same
order as above. |
| arg1 |
Required. The argument to be inserted at
the first %-sign in the format string |
| arg2 |
Optional. The argument to be inserted
at the second %-sign in the format string |
| arg++ |
Optional. The argument to be inserted
at the third, fourth, etc. %-sign in the format string |
Tips and Notes
Note: If there are more % signs than arguments, you must use placeholders. A placeholder is
inserted after the % sign,
and consists of the argument- number and "\$". See example three.
Tip: Related functions: printf(), sprintf(), vfprintf(), vprintf(),
and vsprintf().
Example 1
<?php
$str = "Hello";
$number = 123;
$file = fopen("test.txt","w");
echo fprintf($file,"%s world. Day number %u",$str,$number);
?>
|
The output of the code above will be:
The following text will be written to the file "test.txt":
Hello world. Day number 123
|
Example 2
<?php
$number = 123;
$file = fopen("test.txt","w");
fprintf($file,"%f",$number);
?>
|
The following text will be written to the file "test.txt":
Example 3
Use of placeholders:
<?php
$number = 123;
$file = fopen("test.txt","w");
fprintf($file,"With 2 decimals: %1\$.2f
\nWith no decimals: %1\$u",$number);
?>
|
The following text will be written to the file "test.txt":
With 2 decimals: 123.00
With no decimals: 123
|
Complete PHP String Reference
Make your web applications look like a million bucks
|
|
Most web applications today use boring methods to present data to their viewers using grids or simple HTML tables. FusionCharts induces "life" into the web applications by converting monotonous data into lively charts, gauges & maps.
FusionCharts works with all technologies like ASP, ASP.NET, PHP, ColdFusion, Ruby on Rails, JSP, HTML pages etc.
and connects to any database to render animated & interactive charts. It takes less than 15 minutes and no expertise
whatsoever to build your first chart and just a glance of it to captivate your audience. This fact is endorsed by our
12,000 customers and 150,000 users which include a majority of the Fortune 500 companies.
And yeah, your applications could look like a million bucks by spending just $69.
So go ahead, download your
copy of FusionCharts and start "wow-ing" your customers now!
|
|
