PHP 5 Recipes A Problem-Solution Approach 2005 phần 8 pptx

... type and thenassign a value to it (as in languages such as C++ and Java), PHP automatically assigns a datatype to a variable when a value is allocated to it. This makes PHP rather simple to ... of markup recipes. 50 92_Ch00_FM_FINAL 8/ 26/ 05 5:32 PM Page xxOverview of PHP Data Types and Concepts PHP began life as a way to manage a small personal website and was imagined and realizedby ... programming language such as C++ will feel right at home,as PHP 5 has a truly formidable set of array functionality.Many types of arrays are available to you in PHP 5, and you have many different ways...

... 'supervisor', 'assistant manager', 'manager');public static $payRates = array (5, 8. 25, 12. 45, 17 .5) ;Try making this modification to Employee, and you will find that the example code ... class declaration by prefacing the name of the class withthe abstract keyword, as shown here:abstract class Bird2 -8 ■ USING ABSTRACT CLASSES AND METHODS50 50 92_Ch02_FINAL 8/ 26/ 05 9:46 AM Page ... AM Page 78 List each parameter name with a colon and then the parameter’s data type. Some languages have bothinput and output parameters, and for this reason, you can precede parameter names...

... this:array('country' => array('Spain', 'France', 'Argentina', 'UK','Germany', 'Canada', 'Austria', 'Mexico'),'language' ... value of an array's elements# prototype (returns a number or FALSE if an average cannot be calculated):# mixed array_average(array $array)function array_average($array){$retval = FALSE;if(is_array($array) ... 'Mexico'),'language' => array('Spanish', 'French', 'Spanish', 'English','German', 'English', 'German', 'Spanish'),'visitors'...

... andparagraphs) as it runs through the file. Assume a paragraph is separated by an end line charac-ter, and a word is separated by a blank character. Naturally, you will accept any character forthe character ... $e->getmessage();}?>7 -5 ■ READING AND WRITING COMMA-SEPARATED DATA 299 50 92_Ch07_FINAL 8/ 26/ 05 9 :53 AM Page 299Basically, str_split() returns an array filled with a character (or blocks of characters) ... then parses through the array and waits until itfinds a character that is not in the current array of end characters. After it finds such a character,6-14 ■ USING A PAGE READER CLASS 289 50 92_Ch06_FINAL...

... 55 5-1234" ;80 0 .55 5.1234", // (80 0) 55 5-1234" ;80 0 -55 5-1234", // (80 0) 55 5-1234" ;80 0 .55 5.1234", // (80 0) 55 5-1234" ;80 0 55 51234", // (80 0) 55 5-1234" ;55 51234", // () 55 5-1234);// ... create a blank canvas.if ($animage = imagecreate (50 0, 50 0)){//Now, let's allocate the background color and line color.$white = imagecolorallocate ($animage, 255 , 255 , 255 );$black = imagecolorallocate ... create a title for the graph. 8 -5 ■ CREATING AND USING COLORS 329 50 92_Ch 08_ FINAL 8/ 26/ 05 9 :53 AM Page 329imagestring($animage, 5, $xcoord, 50 , $_GET['whattosay'], $black);//Designate...

... Example 10 -8- 1 .php $fruits = array('apple', 'orange', 'pear', 'apricot','apple', 'apricot', 'orange', 'orange');$str ... VARIABLE TYPES 3 95 5092_Ch10_FINAL 8/ 26/ 05 9 :56 AM Page 3 95 The Code< ?php // Example 10-2-3 .php $a = 5; $b = $a; $a = 7;echo "\ $a = $a and \$b = $b\n"; $a = 5; $b = & $a; $a = 7;echo ... 4 25 5092_Ch10_FINAL 8/ 26/ 05 9 :56 AM Page 4 25 Objects are usually created as an instance of a class or are generated by the engine, andthey will contain methods and/or properties. Properties and methods are accessed...

... and other parts of the document are parsed by the engine. 51 3CHAPTER 14■ ■ ■ 50 92_Ch14_FINAL 8/ 26/ 05 9 :59 AM Page 51 3 50 92_Ch13_FINAL 8/ 26/ 05 9 : 58 AM Page 51 2RSS feeds are available from a ... create a database structure: Example rss.sql Database structure needed for local caching create table tRSSFeed (Xid int default unique,Title varchar (50 0) ,Link varchar(200) ,Url varchar(200) ... $story->getElementsByTagName("url");foreach($urls as $url) {echo $url->nodeValue . "\n";}}?>14 -5 ■ PARSING XML 52 5 50 92_Ch14_FINAL 8/ 26/ 05 9 :59 AM Page 52 514 -5. Parsing XMLSo far...