PHP4 Practical Application (5)

PHP also provides you with a "IF-ELSEIF-ELSE" structure that handles a variety of possible ways. A typical "IF-ELSEIF-ELSE" structure statement looks like this:

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if (the first condition is correct)
{

Do this!
}
ElseIf (second correct condition)
{

Do this!
}
ElseIf (third condition correct)
{

Do this!
}
... Wait a minute...
Else
{

Do this!
}
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Here is an example of how to use this:

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< html>
< head>
< style type= "Text/css" >
td {Font-family:arial;}
</style>

< body>

< font face= "Arial" size= "+2" >
Amazing Fortune Cookie Production program
</FONT>

< form method= "get" action= "cookie.php" >
< table cellspacing= "5" cellpadding= "5" border= "0" >

< tr>
< TD align= "Center" >
Please select a date
</td>
< TD align= "right" >
< select Name= "Day" >
< option value= "Monday" >monday
< option value= "Tuesday" >tuesday
< option value= "Wednesday" >wednesday
< option value= "Thursday" >thursday
< option value= "Friday" >friday
< option value= "Saturday" >saturday
< option value= "Sunday" >sunday
</select>
</td>
</tr>

< tr>
< tr>
< TD colspan= "2" align= "Center" >
< input type= "submit" value= "click me!" >
</td>
</tr>

</table>
</form>
</body>

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You will see that this simple form allows you to choose a day of the week. The real processing work is done by submitting the PHP script "cookie.php".

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<?

if ($day = = "Monday")
{
$fortune = "Do not make it simple and effective when you can find a complex and wonderful way to make everything work."
}
ElseIf ($day = = "Tuesday")
{
$fortune = "Life is the bridge of the game?"-you must have some kind of cunning. ";
}
ElseIf ($day = = "Wednesday")
{
$fortune = "What makes the sane person live in this world and never go mad?" ";
}
ElseIf ($day = = "Thursday")
{
$fortune = "Do not be crazy, be interesting";
}
ElseIf ($day = = "Friday")
{
$fortune = "Just follow the times, follow the ethos, and when you get promoted you will find that the type is a demon." ";
}
Else
{
$fortune = "Sorry, closed on weekends";
}

?>

< html>
< head>
< Basefont face= "Arial" >

< body>
Is this you <? Echo $day;?> 's lucky words:
< br>
< b><? echo $fortune;?></b>

</body>
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In this case, we use control sentences to assign different lucky words to each day.

One important point to note here-when an "if" statement in a struct is found to be true, PHP executes the code, ignores the "if" statement in the remaining structure, and immediately jumps out of the "IF-ELSEIF-ELSE" structure and executes the line behind the entire structure.