A Programmer’s Introduction to PHP 4 0 phần 3 ppt

... returned value is associated with the keys 1and value.Chapter 51 04 Gilmore _05 12/5 /00 10: 23 AM Page 1 04 A call to a variable function is nothing more than a variable name followed by a set of parentheses. ... array)array_walk()The array_walk() function provides an easy way to apply a function to several orall elements in an array. Its syntax is:int array_walk(array array, string func_name, [mixed data])Arrays 107 NOTE ... to N arrays together, appending each to another in the order in which they appear as input parameters. The function’ssyntax is:array array_merge (array array1, array array2, . . ., array arrayN)The...

... following table would be shown:Order ID Customer ID Product ID Quantity 100 005 200 0cu 100 2pr 11 100 0 04 200 2cu 100 0pr 9 100 0 03 200 0cu 100 0pr 12 100 002 200 3cu 100 1pr 5 100 001 200 1cu 100 2pr 3 As you can ... 100 2pr 11 100 0 04 200 2cu 100 0pr 9 100 002 200 3cu 100 1pr 5 100 001 200 1cu 100 2pr 3 Notice that there are four links shown as table headers. Since Quantity is des-ignated as the default sorting attribute, ... information retrieved from the company database (Figure 11-1),the default table displayed by Listing 11-6 follows.Order ID Customer ID Product ID Quantity 100 0 03 200 0cu 100 0pr 12 100 005 200 0cu 100 2pr...

... 6-5.Chapter 6 132 NOTE Keep in mind that although a class can inherit characteristics from a chain of parents, the parents’ constructors are not called automaticallywhen you instantiate an object ... and insteadwill just act as the base for a derived class. This kind of class is known as an ab-stract class. An abstract class is useful when a program designer wants to ensurethat certain functionality ... respectively.Chapter 61 34 Gilmore _06 12 /4/ 00 1 :05 PM Page 1 34 Listing 6-5: Building abstract classes<?class Vehicle {Attribute declarations. . . function Vehicle() {die("Cannot create Abstract...

... LinkingJust as a link can be used to direct a user to an HTML page, it can be used to lead to a PHP- enabled page, as shown here:< ;a href = "date .php& quot;>View today's date< /a& gt;2 13 Gilmore _09 ... POSIXsection.MetacharactersAnother cool thing you can do with Perl regexps is use various metacharacters to search for matches. A metacharacter is simply an alphabetical character precededby a backslash that acts to ... get_meta_tags() function will search an HTML file for what are known asMETA tags.META tags are special descriptive tags that provide information, primarily to search engines, about a particular page....

... querying: SQL can retrieve data in the database and present it in aneasily readable format.• Data manipulation: SQL can insert, update, and delete database data.• Data access control: SQL makes it ... the email address is of valid syntaxif (! @eregi('^ [0- 9a- z]+'.'@'.'( [0- 9a- z-]+\.)+'.'( [0- 9a- z]){2 ,4} $', $email)) :Forms 249 Gilmore_ 10 12/5 /00 2: 23 PM ... build make use of database information to display content, there are always a few pages that aren’t going to change much. PHP and Dynamic Site Development225Gilmore _09 12 /4/ 00 1 :07 PM Page 225<td...

... for a storage media would be a database, since this also facilitates useful features suchas searching and ordering data. I’ll use a MySQL database to store the addressinformation. The table ... are created and assigned values, and then all ofthis information is encoded using session_encode() and inserted into a MySQLdatabase.Chapter 13 338 Gilmore_ 13 12 /4/ 00 1 :09 PM Page 33 8session_destroy()The ... Internet Explorer, the same cookie would be stored as:bgcolorbluelocalhost /php4 /php. exe/book/ 13/ 0 21 548 87 04 0 2 93 7 43 8552262 5 40 82 93 7 43 77* To correctly view a cookie stored by Internet Explorer,...