Specifications

</tr>

<tr>

</tr>

<tr>

</tr>

<tr>

</tr>

<tr>

</tr>

</table>

</body>

</html>

It would be helpful if, rather than requiring an easily bored human—who must be paid for his

time—to type the HTML, a cheap and tireless computer could do it.

Loop statements tell PHP to execute a statement or block repeatedly.

while Loops

The simplest kind of loop in PHP is the while loop. Like an if statement, it relies on a condi-

tion. The difference between a while loop and an if statement is that an if statement executes

the following block of code once if the condition is true. A while loop executes the block

repeatedly for as long as the condition is true.

You generally use a while loop when you don’t know how many iterations will be required to

make the condition true. If you require a fixed number of iterations, consider using a for loop.

The basic structure of a while loop is

while( condition ) expression;

The following while loop will display the numbers from 1 to 5.

$num = 1;

while ($num <= 5 )

{

Using PHP

ART I

LISTING 1.3 Continued

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