Using your own functions

Before long, you will want to use your own functions. Here is an example of some code that declares and uses a function:

0045: <?php
0046:    function in_range($numrowspara)
0047:    {
0048:       if ($numrowspara>=1 && $numrowspara<=10)
0049:          return true;
0050:       else
0051:          return false;
0052:    }
0053:    echo "<HTML><BODY>\n";
0054:    $numrows = $_POST["numrows"];
0055:    if (! in_range($numrows))
0056:    {
0057:       echo "<P>numrows is not within range: $numrows</P>\n";
0058:       echo "</BODY></HTML>\n";
0059:       return;
0060:    }
0061:    for ($rownum = 0; $rownum<$numrows; $rownum++)
0062:    {
0063:       echo "<P>hello world</P>\n";
0064:    }
0065:    echo "</BODY></HTML>\n";
0066: ?>

Go to: http://www.dur.ac.uk/barry.cornelius/papers/phpintro/code/helloformcheck.htm to access a WWW form that actions the above PHP script.