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代码编辑器：

<?php

$num1 = 123456789;
$num2 = -123456789;
$char = 50; 
// The ASCII Character 50 is 2
// Note: The format value "%%" returns a percent sign
printf("%%b = %b ",$num1);

// Binary number
printf("%%c = %c ",$char);

// The ASCII Character
printf("%%d = %d ",$num1) ;

// Signed decimal number
printf("%%d = %d ",$num2);

// Signed decimal number
printf("%%e = %e ",$num1);

// Scientific notation (lowercase)
printf("%%E = %E ",$num1);

// Scientific notation (uppercase)
printf("%%u = %u ",$num1);

// Unsigned decimal number (positive)
printf("%%u = %u ",$num2);

// Unsigned decimal number (negative)
printf("%%f = %f ",$num1);

// Floating-point number (local settings aware)
printf("%%F = %F ",$num1);

// Floating-point number (not local sett aware)
printf("%%g = %g ",$num1) ;

// Shorter of %e and %f
printf("%%G = %G ",$num1) ;

// Shorter of %E and %f
printf("%%o = %o ",$num1) ;

// Octal number
printf("%%s = %s ",$num1) ;

// String
printf("%%x = %x ",$num1);

// Hexadecimal number (lowercase)
printf("%%X = %X ",$num1);

// Hex a decimal number (uppercase)
printf("%%+d = %+d ",$num1) ;

// Sign specifier (positive)
printf("%%+d = %+d ",$num2) ;

代码编辑器：

运行结果：