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ISBN: Order
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1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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2 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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3
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4 <!-- Fig. 26.3: data.php -->
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5 <!-- Demonstration of PHP data types -->
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6 ;
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7 "http://www.w3.org/1999/xhtml">
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8 <head>
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9 <title>PHP data types</title>
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10 </head>
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11
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12 <body>
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13
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14 <?php
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15
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16 // declare a string, double and integer
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17 $testString = "3.5 seconds";;
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18 $testDouble = 79.2;
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19 $testInteger = 12;
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20 ?>
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21
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22 <!-- print each variable's value -->
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23 <?php print( $testString ); ?> is a string.<br />
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24 <?php print( $testDouble ); ?> is a double.<br />
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25 ;<?php print( $testInteger ); ?> is an integer.<br />
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26
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27 <br />
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28 Now, converting to other types:<br />
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29 <?php
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30
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31 // call function settype to convert variable
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32 // testString to different data types
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33 print( "$testString" );
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34 settype( $testString, "double" );
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35 print( " as a double is $testString <br />" );
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36 print( "$testString" );
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37 settype( $testString, "integer" );
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38 print( " as an integer is $testString <br />" );
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39 settype( $testString, "string" );
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40 print( "Converting back to a string results in
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41 $testString <br /><br />" );
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42
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43 $data = "98.6 degrees";
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44
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45 // use type casting to cast variables to a
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46 // different type
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47 print( "Now using type casting instead: <br />
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48 As a string - " . (string) $data .
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49 "<br />As a double - " . (double) $data .
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50 "<br />As an integer - " . (integer) $data );
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51 ?>
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52 </body>
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53 </html>
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