Sams Teach Yourself PHP in 24 Hours, Third Edition

Functions Revisited

Now that we have covered arrays, we can examine some built-in functions that could help you make your own functions more flexible. If you have programmed in Perl before, you will know that you can easily create subroutines that accept a variable number of arguments. PHP provides functions that make it just as easy.

Imagine that you have created a function that accepts three string arguments and returns a single string containing each of the provided arguments wrapped in an HTML table, which includes the sum of the numbers in its final row:

 function addNums( $num1, $num2 ) { $result = $num1 + $num2; $ret = "<table border=\"1\">"; $ret .= "<tr><td>number 1: </td><td>$num1 </td></tr>"; $ret .= "<tr><td>number 2: </td><td>$num2 ...