what is the syntax of the PRINTF() function in php?
printf(format,arg1,arg2,arg++)| Parameter | Description |
|---|---|
| format | Required. Specifies the string and how to format the variables in it.Possible format values:%% – Returns a percent sign%b – Binary number%c – The character according to the ASCII value%d – Signed decimal number (negative, zero or positive)%e – Scientific notation using a lowercase (e.g. 1.2e+2)%E – Scientific notation using a uppercase (e.g. 1.2E+2)%u – Unsigned decimal number (equal to or greather than zero)%f – Floating-point number (local settings aware)%F – Floating-point number (not local settings aware)%g – shorter of %e and %f%G – shorter of %E and %f%o – Octal number%s – String%x – Hexadecimal number (lowercase letters)%X – Hexadecimal number (uppercase letters)Additional format values. These are placed between the % and the letter (example %.2f):+ (Forces both + and – in front of numbers. By default, only negative numbers are marked)’ (Specifies what to use as padding. Default is space. Must be used together with the width specifier. Example: %’x20s (this uses “x” as padding)- (Left-justifies the variable value)[0-9] (Specifies the minimum width held of to the variable value).[0-9] (Specifies the number of decimal digits or maximum string length)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 |
examples of the PRINTF() function
Examples 1. In this example, we output a formatted string.
<?php
$number = 9;
$str = "Beijing";
printf("There are %u million bicycles in %s.",$number,$str);
?>Examples 2. In this example, we Using the format value %f.
<?php
$number = 123;
printf("%f",$number);
?>Examples 3. In this example, we Use of placeholders.
<?php
$number = 123;
printf("With 2 decimals: %1\$.2f
<br>With no decimals: %1\$u",$number);
?>
