PHP sprintf() Funksie
Voorbeeld
Vervang die persentasieteken (%) deur 'n veranderlike wat as 'n argument geslaag is:
<?php
$number = 9;
$str = "Beijing";
$txt = sprintf("There are %u million bicycles in %s.",$number,$str);
echo $txt;
?>
Definisie en gebruik
Die sprintf()-funksie skryf 'n geformateerde string na 'n veranderlike.
Die arg1, arg2, ++ parameters sal by persent (%) tekens in die hoofstring ingevoeg word. Hierdie funksie werk "stap-vir-stap". By die eerste % teken word arg1 ingevoeg, by die tweede % teken word arg2 ingevoeg, ens.
Let wel: As daar meer % tekens as argumente is, moet jy plekhouers gebruik. 'n Plekhouer word na die %-teken ingevoeg en bestaan uit die argument-nommer en "\$". Sien voorbeeld twee.
Wenk: Verwante funksies: printf() , vprintf() , vsprintf() , fprintf() en vfprintf()
Sintaksis
sprintf(format,arg1,arg2,arg++)
Parameterwaardes
| Parameter | Description |
|---|---|
| format | Required. Specifies the string and how to format the variables in it. Possible format values:
Additional format values. These are placed between the % and the letter (example %.2f):
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 |
Tegniese besonderhede
| Terugkeerwaarde: | Wys die geformateerde string |
|---|---|
| PHP weergawe: | 4+ |
Meer voorbeelde
Voorbeeld
Gebruik die formaatwaarde %f:
<?php
$number = 123;
$txt = sprintf("%f",$number);
echo $txt;
?>
Voorbeeld
Gebruik van plekhouers:
<?php
$number = 123;
$txt = sprintf("With 2 decimals: %1\$.2f
<br>With no decimals: %1\$u",$number);
echo $txt;
?>
Voorbeeld
'n Demonstrasie van alle moontlike formaatwaardes:
<?php
$num1 = 123456789;
$num2 = -123456789;
$char = 50; // The ASCII Character 50 is 2
// Note: The format value "%%" returns a percent sign
echo sprintf("%%b = %b",$num1)."<br>"; // Binary number
echo sprintf("%%c = %c",$char)."<br>"; // The ASCII Character
echo sprintf("%%d = %d",$num1)."<br>"; // Signed decimal number
echo sprintf("%%d = %d",$num2)."<br>"; // Signed decimal number
echo sprintf("%%e = %e",$num1)."<br>"; // Scientific notation (lowercase)
echo sprintf("%%E = %E",$num1)."<br>"; // Scientific notation (uppercase)
echo sprintf("%%u = %u",$num1)."<br>"; // Unsigned decimal number (positive)
echo sprintf("%%u = %u",$num2)."<br>"; // Unsigned decimal number (negative)
echo sprintf("%%f = %f",$num1)."<br>"; // Floating-point number (local settings aware)
echo sprintf("%%F = %F",$num1)."<br>"; // Floating-point number (not local sett aware)
echo sprintf("%%g = %g",$num1)."<br>"; // Shorter of %e and %f
echo sprintf("%%G = %G",$num1)."<br>"; // Shorter of %E and %f
echo sprintf("%%o = %o",$num1)."<br>"; // Octal number
echo sprintf("%%s = %s",$num1)."<br>"; // String
echo sprintf("%%x = %x",$num1)."<br>"; // Hexadecimal number (lowercase)
echo sprintf("%%X = %X",$num1)."<br>"; // Hexadecimal number (uppercase)
echo sprintf("%%+d = %+d",$num1)."<br>"; // Sign specifier (positive)
echo sprintf("%%+d = %+d",$num2)."<br>"; // Sign specifier (negative)
?>
Voorbeeld
'n Demonstrasie van snaarspesifiseerders:
<?php
$str1 = "Hello";
$str2 = "Hello world!";
echo sprintf("[%s]",$str1)."<br>";
echo sprintf("[%8s]",$str1)."<br>";
echo sprintf("[%-8s]",$str1)."<br>";
echo sprintf("[%08s]",$str1)."<br>";
echo sprintf("[%'*8s]",$str1)."<br>";
echo sprintf("[%8.8s]",$str2)."<br>";
?>
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