Learning PHP and MySQL
Chapter 3 Code
Source code from the 3rd chapter.
Wednesday, July 19, 2006
Example 03-16 Correct escaping of special characters
<?php
// OK because we used single quotes
echo "<h2 class=\"specialH2\">Margaritaville!</h2>";
echo '<h2 class="specialH2">Margaritaville!</h2>';
?>
Chapter 3 Code • (27) Comments • (163) Trackbacks • Permalink
Example 03-17 Using strcmp to compare two stings
<?php
$name1 = "Bill";
$name2 = "BILL";
$result = strcasecmp($name1, $name2);
if (!$result){
echo "They match.";
}
?>
Returns:
They match.
Example 03-18 Concatenating strings together
<?php
$my_string = "Hello Max. My name is: ";
$newline = "<br />";
echo $my_string . "Paula" . $newline;
echo "Hi, I'm Max. Who are you? " . $my_string . $newline;
echo "Hi, I'm Max. Who are you? " . $my_string . "Paula";
//The last line is the same as echo "Hi, I’m max. Who are you? $my_string Paula";
?>
Chapter 3 Code • (27) Comments • (4) Trackbacks • Permalink
Example 03-19 Combining a string and a number
<?php
$str = "This is an example of ". 3 ." in the middle of a string.";
echo $str;
?>
Displays:
This is an example of 3 in the middle of a string.
Example 03-20 Using a constant in your program
<?php
define("HELLO", "Hello world!");
echo HELLO; // outputs "Hello world."
?>
Outputs:
Hello world!
Chapter 3 Code • (0) Comments • (45) Trackbacks • Permalink
Example 03-22 PHP mathematical function usage
<?php>
$sunny_days=300;
$Margaritaville_sunny_days_ratio=$sunny_days/365;
echo $Margaritaville_sunny_days_ratio;
?>
Example 03-23 Using autoincrement to add to a variable
<?php
$counter=1;
$counter++;
echo $counter
?>
Produces:
2
Example 03-24 Using the autodecrement operator
<?php
$counter=1;
$counter--;
echo $counter
?>
Produces:
0
Example 03-25 Using pre- and post-increment
<?php
$test=1;
echo "Preincrement: ".(++$test);
echo "<BR>";
echo "Value afterwords: ".$test;
echo "<BR>";
$test=1;
echo "Postincrement: ".($test++);
echo "<BR>";
echo "Value afterwords: ".$test;
?>
Produces:
Preincrement: 2
Value afterwords: 2
Postincrement: 1
Value afterwords: 2
Chapter 3 Code • (26) Comments • (2) Trackbacks • Permalink
Example 3-21 Echoing the line and file predefined constants for a script called predefined_constants
<?php
echo "Executing line ". __LINE__ . " of PHP script " . __FILE__ . '.';
?>
Returns:
Executing line 2 of PHP script /home/www/html/oreilly/ch3/predefined_constants.php.
Chapter 3 Code • (0) Comments • (1067) Trackbacks • Permalink
Statistics
This page has been viewed 375193 times
Page rendered in 0.2150 seconds
Total Entries: 224
Total Comments: 16
Total Trackbacks: 307338
Most Recent Entry: 09/27/2006 12:39 pm
Most Recent Comment on: 10/26/2007 10:00 am
Total Members: 2
Total Logged in members: 0
Total guests: 11
Total anonymous users: 0
Most Recent Visitor on: 02/10/2012 09:24 am
The most visitors ever was 1103 on 11/20/2007 12:50 pm
