PHP sprintf () function How to use _php tutorial

Source: Internet
Author: User
Tags cdata uppercase letter
We know that the sprintf () function writes a formatted string to a variable, and we often see this type of code, let me introduce the sprintf () function using the method, a friend who needs to refer to the reference.

Usage

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

Description
The parameters format is the converted format, starting with the percent sign ("%") to the end of the converted character. The following possible format values are:

%%-return percent symbol
%b-binary number
%c-Characters in accordance with ASCII values
%d-Signed decimal number
%e-Sustainable counting method (e.g. 1.5e+3)
%u-Unsigned decimal number
%f-Floating point (Local settings Aware)
%f-Floating point number (not local settings aware)
%o-Eight binary number
%s-String
%x-16 decimal digits (lowercase letters)
%x-16 decimal digits (uppercase letters)
Arg1, arg2, + + etc parameters will be inserted into the main string percent percent (%) Symbol. This function is executed step-by. In the first% symbol, insert arg1, insert arg2 at the second% symbol, and so on.

I will see the following code on the open platform

The code is as follows Copy Code

$POSTOBJ = simplexml_load_string ($postStr, ' simplexmlelement ', libxml_nocdata);
$fromUsername = $POSTOBJ->fromusername;
$toUsername = $POSTOBJ->tousername;
$keyword = Trim ($postObj->content);
$time = time ();
$msgType = "text";
$TEXTTPL = "
%s
%s
%s
%s
%s
0
";
if (!empty ($keyword))
{

$CONTENTSTR = $this->keyrep ($keyword);
if (empty ($CONTENTSTR))
{
$CONTENTSTR = "You deliberately, no culture is terrible";//You deliberately, no culture is really scary;
}
$CONTENTSTR = @iconv (' UTF-8 ', ' gb2312 ', $keyword);
$RESULTSTR = sprintf ($TEXTTPL, $fromUsername, $toUsername, $time, $msgType, $CONTENTSTR);
Echo $resultStr;

}else{
$contentStr = ' No culture really scary, can't actually type! ';//$this->keyrep ($keyword);
$CONTENTSTR = @iconv (' UTF-8 ', ' gb2312 ', $keyword);
$RESULTSTR = sprintf ($TEXTTPL, $fromUsername, $toUsername, $time, $msgType, $CONTENTSTR);
Echo $resultStr;
}

The above is used in the XML, the following look at a netizen to write an example

The code is as follows Copy Code


/**
* the sprintf () function uses
* @date 2012-12-17
* @author Cntnn11
*/
/**
* Manual definition: The function writes a formatted string to a variable.
* His recognizable format
* Percent%-return percentage symbol
*%b-binary number
*%c-Characters in accordance with ASCII values
*%d-Signed decimal number
*%e-scientific notation (e.g. 1.5e+3)
*%u-Unsigned decimal number
*%f-floating point (Local settings Aware)
*%F-floating point number (not local settings aware)
*%o-Eight binary number
*%s-string
*%x-16 binary number (lowercase letter)
*%x-16 binary number (capital letter)
* sprintf ($STR, Arg1, arg2, arg3 ...);
*/

/**
* 1. %%
* Replace percent to%
*/
$TESTSTR = ' Test the percent of this parameter. will be replaced by what? ';
echo sprintf ($testStr), '
';
Test% of this parameter. will be replaced by what?
There's only one percent left.
It seems really just to return a '% '. But how do you use it in real-world applications?
And I don't know ~
Echo '


';
/**
* 2. %b
* This parameter can only replace integer data. If it is a floating-point type, then he will only take the integer part. After the decimal point will be ignored
* If it is a non-integer data, then return 0
*/
$TESTSTR = ' heard that%b will be replaced with binary numbers, really? ';
$arg = ' 10 ';
Echo sprintf ($TESTSTR, $arg), '
';
-1010; $arg = 10; It's really a replacement!
-101; $arg =4.5
-0; $arg =str/bool ...
Echo '

';

/**
* 3. %c returns the ASCII code for character encoding
* tip:[He is not returning ASCII code]
* $arg accepts an int. numeric value that is passed in as ASCII and returns the character corresponding to that value
*/
$TESTSTR = ' Let's Test the next%c: try to return the ASCII code ';
$arg = ' 122 ';
Echo sprintf ($TESTSTR, $arg);
A; $arg = 65;
-Z; $arg =122
Echo '

';
/**
* 4. %d replaces a segment of character%d with type int
* TIP: This can be any int integer type.
* If it is a floating-point data, it will only replace the integral part of the
* If it is non-digital, then replace it with 0
*/
$TESTSTR = "This is a id,id number is%d,";
$arg = '-4 ';
Echo sprintf ($TESTSTR, $arg);
-4; $arg =4.5
-0; $arg =[a-za-zs];
Echo '

';

/**
* 5. %e Scientific Counting method
* TIP: A long, long, int integer data is presented in the form of scientific notation
* Same as%d, the function will also ignore the decimal point, any non-numeric data replaced by 0
*/
$TESTSTR = "I am very long, there are n many ... %e ";
$arg = ' 46498464654864564642449463699789789313 ';
Echo sprintf ($TESTSTR, $arg);
-4.649846e+14; $arg =464984646548645.64642449463699789789313
-0.000000e+0; $arg =ASDFASDF;
Echo '

';

/**
* 5. %u-Unsigned decimal number
* Don't understand ... If there is a negative number, he doesn't know what the value is.
*/
$TESTSTR = "I am an unsigned decimal number ... %u ";
$arg = ' 456 ';
Echo sprintf ($TESTSTR, $arg);
Echo '

';

/**
* 6. %f-Floating point (Local settings Aware)
* Is it the opposite of%d?
* This will return a floating-point number, and only a fixed 6-bit after the decimal point
* The string is also 0;
*/
$TESTSTR = "What's the difference between that and d?" %f ";
$arg = ' 456.235645 ';
Echo sprintf ($TESTSTR, $arg);
Echo '

';

/**
* 7. %F-Floating point number (not local settings aware)
* Is it the opposite of%f? What's the difference between a little f? No way
*/
$TESTSTR = "What's the difference between that and that lowercase f?" %F ";
$arg = ' 12312316.46898 ';
Echo sprintf ($TESTSTR, $arg);
Echo '

';

/**
* 8. %o-Eight binary number
* Same as%d. Only the parameter is passed in an octal value
*/
$TESTSTR = "Replace octal number with decimal%o";
$arg = ' 8 ';
Echo sprintf ($TESTSTR, $arg);
Echo '

';

/**
* 9. %x-16 binary number (lowercase letters)
* Same as%d/%o. Only the parameter is passed in a lowercase hexadecimal value
*/
$TESTSTR = "Replace hexadecimal number with decimal%o";
$arg = ' 456d12 ';
Echo sprintf ($TESTSTR, $arg);
Echo '

';

/**
* 10. %x-16 decimal digits (uppercase letters)
* Same as%d/%o/%x. Only the parameter is passed in a hexadecimal value of an uppercase letter
* Seemingly%x%x two letter case No difference ...
*/
$TESTSTR = "Replace the hexadecimal number of uppercase letters with the decimal%o";
$arg = ' 456d12 ';
Echo sprintf ($TESTSTR, $arg);
Echo '

';

/**
* 11. %s-String
* Replace%s with the string you passed in
*/
$string = "This is the string used to test the sprintf (%s). Today, we consumed%f yuan. There are%d stops from the West two flags to the known spring Road. Work ";
$arg = ";
Echo sprintf ($string, $arg, 234, 10);
Echo '

';


?>

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