sprintf php sprintf function makes your sql operations safer

$bookSQL=sprintf("UPDATE book SET pass=%s WHERE id=%d",
                                                             GetSQLValueString($_GET['id'],"int "));
GetSQLValueString This function can be replaced by other functions
But if the sprintf() function is used in the sql statement! It is relatively safer. For example, we can use %d for id
or when there are many sql operations, use this
$Result = $db->query($bookSQL) or die(mysql_error());
Add below the description of the sprintf function:
Quote
sprintf
Format the string.
Syntax: string sprintf(string format, mixed [args]...);
Return value: String
Function type: Data processing
Content description
This function is used to format a string. The parameter format is the conversion format, starting with the percent sign % and ending with the conversion character. The converted formats include
fill-in-the-blank characters in sequence. If 0 , it means that the blanks are filled with 0; blanks are the default value, which means that the blanks are left alone.
Alignment. The default is right-aligned, with negative tables aligned left.
Field width. is the minimum width.
Accuracy. Refers to the number of floating point digits after the decimal point.
Type, see the table below % prints the percentage symbol without conversion.
b Convert integer to binary.
c Convert integers to corresponding ASCII characters.
d Convert integer to decimal.
f times precision numbers are converted into floating point numbers.
o Convert integers to octal.
s Convert integer to string.
x Convert integer to lower case hexadecimal.
X Convert integer to uppercase hexadecimal.