Learning PHP and MySQL
Wednesday, July 19, 2006
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";
?>
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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!
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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
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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.
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Thursday, July 06, 2006
Googling now a verb!
’The Oxford English Dictionary (OED), which bills itself as “The definitive record of the English language,” added the company name as a verb in the latest round of updates, placing Google in such august company as FedEx, TiVo, and Xerox.’
Taken from this article: Googling
PHP Variable
<?php
$age = 30;
?>
Then reassign the value with:
<?php
$age = 30;
$age = 31;
echo $age;
?>
You should get the new $age as 31.
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