ch.7a array and time

8/9/2019 Ch.7a Array and Time

1/30

Hong Kong Baptist University

Week 7

Array and Time

01/03/2010

Dr. Tony Chun-Kuen WONG

Coordinator, BBA(Hons) Information Systems Management Major

Coordinator, BBA(Hons Information S stems and e-Business Mana ement

Concentration

Department of Finance and Decision Sciences

School of Business


2/30


Arrays

n arrays s a s o var a es

The index number start with 0 rrays n exe y str ngs are nown as assoc at ve arrays

Arrays that contain arrays as their elements are known as


3/30


Example (using number as index)

$users = array (Ludwig, Tony,Billy);

// or

$users[ ] = Ludwig;

=

$users[ ] = Billy;

print $users[1]; //return Tony


4/30


Example (using string as index)

$character = array (name=>Ludwig,occupat on=> teac er ,

age=>30,

special knowledge=>SMALL expert);

// or$character[name] = Ludwig;

$character[occupation] = teacher;

$character[age] = 30;

$character[special knowledge] = SMALL expert;


5/30


Multidimensional Array

amp e rogramme

http://isem03.hkbu.edu.hk/~isemuser20/array/Array01.php

previous two examples.

Assessing by $user[numerical index][string index]


6/30


Accessing arrays

The index of the last element is count($users)1

The Count ( ) will return the size of the array

Looping through an array (Sample Programme 2 and 3) http://isem03.hkbu.edu.hk/~isemuser20/array/Array02.php

http://isem03.hkbu.edu.hk/~isemuser20/array/Array03.php

foreach($array as $temp)

{

//

}

//or

foreach($array as $key=>$value)

//}


7/30


an pu a ng rrays

Joining two arrays with array_merge()

Adding multiple variables to an array with array_push() Removing the first element of an array with array_shift()

Slicing arrays with array_slice()

Sorting an associative array by value with asort()

Sorting an associative array by key with ksort()


8/30


Arrays more.

rsort() opposite of sort()

krsort() opposite of ksort()

select the next data in the array and its value

end() point to the end of the array

pos(), prev(), shuffle()


9/30


Forms Revisited

testform.html

http://isem03.hkbu.edu.hk/~isemuser20/form2/testform.html

testform01.html

~


10/30


Form

orm ac on = a ress

method=transmission method>t e content o t e orm


11/30


GLOBALS

ou can assess a unc ons y us ng e u - n

associative array call

.

p: sem . u.e u. ~ semuser orm g o a .p p


12/30


Globals.php

Global demonstration


13/30


ome re e ne var a es

$HTTP_USER_AGENT The name and version of the client

_ e a ress o e c en

$REQUEST_METHOD Whether the request was GET or POST

$QUERY_STRING For GET requests, the encoded data senda ended to the URL

$REQUEST_URI The full address of the request including query

$HTTP_REFERER The address of the page from which the requestwas made


14/30


Associative Array s ng or oop to pr nt t e ata out

The variable is either _ or

$_POST


15/30


.

foreach ($ POST as $ke id => $var)_

{

if (gettype($var) == "array")

print "$keyid ==EQUAL TO==

\n";

foreach ($var as $two_dim_value)

rint ".............. $two dim value
";_ _

}else

print "$keyid =equal to= $var

\n";

}

}Calling program : formdemo01.html

http://isem03.hkbu.edu.hk/~isemuser20/form2/formdemo01.html


16/30


More flexible

Extracting Parameters from either a GET or POST

Extract parameter between get and post by using isset

Syntax

_

?$_POST:$_GET

Use $methodused in the for loop


17/30


Combining HTML and PHP

yn ax


18/30


An HTML From Calls Itself

HTML form that calls


19/30


Example

ony uess ng s ame orm .p p

http://isem03.hkbu.edu.hk/~isemuser20/form2/form201.php

Notes

How to count the number of trial

How to generate the number to guess


20/30


Question

Table define the format

Form to collect data

Php to process the data captured and present the information

(Need looping skill with array)

But how to store date, we need a database

y s a ree a a ase a we can use o s ore e a a


21/30



22/30


First Program : time01.phphttp://isem03.hkbu.edu.hk/~isemuser20/time/time01.php


23/30


Meaning of the output time ( )

e num er o secon s e apse s nce m n g on

January 1, 1970

We will use getdate ( ) to convert it to the normal Time

getdate ( ) optionally accepts a time stamp and returns anassociative array containing the information about the date


24/30


The associative array returned by getdate ( )

Key Description Exampleseco n s econ s pas e m nu es -

minutes Minutes past the hour (0 59) 7

mday Day of the month (1 31) 20

m on Month of the year (1 12) 1

ear Year 4 di its 2000

yday Day of year (0 365) 19

weekday Day of the week(name) Thursday

month Month of the year (name) January0 Timestamp 948370048


25/30


.

http://isem03.hkbu.edu.hk/~isemuser20/time/time02.php

Part of the program

date_default_timezone_set('Asia/Hong_Kong');

emo_ a e_array = ge a e ;

//no argument passed so today's date will be used

=_ _

{ print "$key = $val
"; }

print "Today's date :$demo_date_array[mday]/$demo_date_array[mon]/$d

< >"_ _


26/30


Converting a Time Stamp with date ( )

e a e unc on re urns a orma e s r ng

representing a date

Formatting

. . . .


27/30


.


Portion of the code

print date("m/d/y G.i:s
", time());

Hour.minute:second

print "Today is ";

" ", . ,// Today is Day ofMonth Year, at hour.minutes am/pm

lowercase

H K B i U i i


28/30


Creating Time Stamps with mktime ( )

,

yeat work with arbitrary dates. mktime ( ) returns a time stamp that

you can then use with date ( ) or getdate ( ).

mktime ( ) accepts up to six integer arguments in the following order :

minute second

month

day of month

ear

H K B ti t U i it


29/30



Portion of the code

// make a timestamp for 4/18/98 at 8.00 am

$ts = mktime(8, 0, 0, 4, 18, 1998);

print date("m/d/y G.i:s
", $ts);

print "The date is ";

pr nt ate o , a t g. a , ts ;

H K B ti t U i it


30/30


Checking for a date with checkdate ( )

input before you work with this date, or store it in a

database. checkdate ( ) accepts three integers : month, day, and

year. checkdate ( ) return true if

Month is between 1 and 12, The day is acceptable for the given month and year (accounting

,

.http://isem03.hkbu.edu.hk/~isemuser20/time/time05.php

ch.7a array and time

Documents