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PHP printf() Function

PHP printf() Function

PHP string printf() function is used to get the output as a formatted string. We can pass multiple parameters in this function. The arguments will be inserted at percent (%) signs one by one in the respected order. Args1 will be inserted at first percent(%) sign, args2 will be inserted at second percent (%) sign and so on.

Syntax:

 printf($format,$arg1,$arg2,$arg++);  

Parameter Values

Parameter Description
format This is a required parameter. This parameter contains the string and how to format the variables in it. Some of the possible format values:
  • %% - Returns a percent sign.
  • %b – Inserts a binary number.
  • %c – Inserts the character according to the ASCII value.
  • %d – Inserts a signed decimal number.
  • %e – Inserts a scientific notation using a lowercase.
  • %E – Inserts a scientific notation using a uppercase.
  • %u – Inserts a unsigned decimal number.
  • %f – Inserts a floating-point number.
  • %o – Inserts an octal number.
  • %s – Inserts a string.
  • %x – Inserts a hexadecimal number.
arg1 This is a required parameter. This parameter contains the argument to be inserted at the first %-sign.
arg2 This is an optional parameter. This parameter contains the argument to be inserted at the second %-sign.
arg++ This is an optional parameter. This parameter contains the argument to be inserted at the upcoming %-sign.

Here is an example of printf() function in PHP:

<html>
<body>

<?php
$age = 18;
$name = "Someone";
printf("%s is %u years old.",$name,$age);
?>

</body>
</html>
Output:
Someone is 18 years old.

Here is an another example of printf() function in PHP:

<html>
<body>

<?php
$price = 736;
printf("%f",$price);
?>

</body>
</html>
Output:
736.000000

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