php中sprintf函数用法详细

$query = sprintf('INSERT INTO %sUSER (USERNAME, PASSWORD, ' .  
   'EMAIL_ADDR, IS_ACTIVE, PERMISSION) VALUES ("%s", "%s", "%s", %d, %d)',  
DB_TBL_PREFIX,  
   mysql_real_escape_string($this->username, $GLOBALS['DB']),  
   mysql_real_escape_string($this->password, $GLOBALS['DB']),  
  mysql_real_escape_string($this->emailAddr, $GLOBALS['DB']),  
   $this->isActive,  
$this->permission);

int printf(string $format[,mixed $arg1[,mixed args2...]])
string sprintf(string $format[,mixed $arg1[,mixed args2...]])

<?PHP 
$str=&#39;let\&#39;s study php!&#39;; 
echo $str."<br/>"; 
$number=print $str."<br/>"; 
echo $number."<br/>"; 
$format="%b%c%d"; 
$number1=printf($format,88,88,88); 
echo "<br/>".$number1; 
echo "<br/>".sprintf($format,88,88,88); 
?>