HTML and Php r13

7/24/2019 HTML and Php r13

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WORLD WIDE WEB ,

HTML AND PHPK.VENKATESWARA RAO

ASST.PROFESSOR

DEPT. OF COMPUTER SCIENCE &ENGINEERING


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Typical Life cycle of a web


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Typical Life cycle of a webpage


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PHP INTRODUCTION

PHP stands for Personal Home Page, HypertextPreprocessor.

PHP is used to develop dynamic web

applications PHP is server side scripting language

implemented by Rasmus Lerdorf in 199 using! and Perl tec"nologies.


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#eatures of PHP

!ross platform$ %t can run under any type ofoperating system.

!ross server$ %t can run under di&erent typesof web servers, li'e %%(, )pac"e , Tomcat etc.

!ross database$ %t supports any type ofdatabase server.

PHP .* +y(L$ p"p .* is providing +y(L

library to interact wit" +y(L -atabase. PHP is a open source.


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#eatures cont.

P"p provides number of security functions toapply security to applicationsaut"entication/.

P"p supports few ob0ect oriented conceptsalso.

P"p supports di&erent types of editors todevelop programs li'e notepad, edit etc.

2end organi3ation provides complete support

to p"p developers t"roug" online. P"p is easy to understand and easy to

develop.


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P"p is partially case sensitive language. %n

functions point of view case insentive andvariables point of view case sensitive.

4very statement in p"p s"ould end wit"semicolon.

P"p is loosely typed language t"at5s w"y noneed to specify data types at t"e time ofdeclaration.

6ariable names in p"p starts wit" 785 symbol.

P"p script we s"ould include wit"in t"e scriptdeclation tag :p"p ;. :uest and sends responsebac' to t"e client.

=eb browser$ it is software used to

open web application from webserver.

!lient side script$ t"e script is

executed by t"e client system wit"t"e "elp of web browser.

examples?HT+L , @ava(cript etc.

(erver side script$ t"e script is


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Tools to wor' wit" PHP:

=)+P L)+P

A)+PP

)fter installation of xampp we can Bnd xamppfolder in destination location.it contains number ofsubfolders

"tdocs

tmp

p"papac"e

mys>l

(teps to create and execute p"p


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(teps to create and execute p"pprogram

Cpen editor and implement p"pscript using declaration style tags.

(ave t"is Ble in t"e root directory

wit" extension 7.p"p5. Cpen xampp control panel and start

apac"e server.

Cpen browser and send re>uest tot"e server to get t"e output of p"pBle.

l i l


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-eclaration style tagsP"p is providing di&erent types of declaration style tags.

1.Dniversal style tag$:p"p ;;. :lZconnect[local"ost[,[root[,[[/O

ec"o 8conO

print [br


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Types of operators

Cperator is a decision ma'er in p"p? simple as additionsubtraction

? complex as andor conditional statement

Types of operators

? assignment operator I/

i.e. 8varIvalueO? arit"matic operators ,Z,\,,G/

i.e. 8var1I1EO

8varEI1*?FO

8varFI1E\O

8varI1EO? modulus is t"e remainder of a division operator

i.e. 1*FIF

1*GFI1


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? concatination operator . /

i.e. 8var1I8var1. JredKO

CR 8var1.IJredKO

? increment / and decrement ?? /operators.

i.e. 8aO 8b??O- placement of increment and decrement

operators are important.

- preBxing 8aO / will

incrementdecrement and return t"e value.

- PostBxing 8aO / will return t"e value,and t"e incrementdecrement.

example


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example

:p"p8aIEO

print 8aO

print [br


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? assist in t"e decision ma'ing process ofconditional statements

? result in a boolean valuei.e. ]es or no, 1 or *

? X main operators II,^I,,


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Logical operators

Cften used in con0unction wit" logical operators.? logical operators __,``,^,xor /

? and, __ / returns true if left and rig"t sidesare not false.

? or, `` / returns true if left or rig"t sides aretrue.

? ^ / exclamation sign modiBes a true, falsestatement.

? xor / returns true of eit"er t"e left or rig"t aretrue.

example


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example

8aIO8bIXO

8cI8a8bO

8dI8aO

8a __ 8b ^IO

8a `` 8b II8dO

8a 8b II 8cO

Logi.p"p:p"p8aIO8bIXO8cI8a8bO8dI8aOif8a__8b^I/if8a __ 8b


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)rrays

)rray is a collection of

"eterogeneous data types.

P"p is loosely typed language t"at5sw"y we can store any type of values

in arrays. )rray contains number of elements ,

eac" element is a combination of

element 'ey and element value.(yntax$ variablenameIarrayele1,eleE,eleF,;/O4x$ 8arrIarray1*,E*,F*/O

4xample 1


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4xample?1:p"p

8arrIarray1*,E*,F*/OprintZr8arr/O

ec"o 8arrEUO

print [br


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8arrIarray/O

8arr*UIE*O

8arr1UI*O

8arrEUINmanagerNO

printZr8arr/O

print [br


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sort8arr/Oascending order wit" new 'eys

printZr8arr/O

print [br


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explode/,implode/

explode/?(plits up a string by aspeciBed delimiter and creates anarray of strings.

implode/? !reates a string by gluingtoget"er array elements by a speciBcseparator.

4xample$8statsZarray I arrayNnameN, NssnN, Np"oneN/O implode/ createsa string froman array

8statsZstring I implode[,[, 8array/O:p"p8colorsI[red green orange blue[O !reate a stringec"o 8colorsOec"o [b


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!rr!(2*$nt23!l$e'45 Returns anarray consisting of t"e values of anarray and t"e number of times eac"

value occurs in an array.:p"p8colorsIarray[red[, [blue[, [green[, [red[, [yellow[,[red[,[blue[/O8uni>ueZcount I arrayZcountZvalues8colors/O

printZr8uni>ueZcount/.[br


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)rrayZmerge/?to merge t"e elements of E arrays.

("ue/? it s"ues t"e array elements.:p"p

8arrIarray1*,E*,F*/O

s"ue8arr/O

printZr8arr/Oprint [br


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(trings

PHP provides many functions wit" w"ic" you can format andmanipulate strings.

Fr%!tt"ng Str"ng' 6"t- PHP

S#e*"7er De'*r"#t"n

d -isplay argument as a decimal number

b -isplay an integer as a binary number

c -isplay an integer as )(!%% e>uivalent

f -isplay an integer as a Voating?point number double/

o -isplay an integer as an octal number

( -isplay argument as a stringx -isplay an integer as a lowercase "exadecimal number

A -isplay an integer as an uppercase "exadecimal number

4xample$str1 p"p"tdocs/


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4xample$str1.p"p"tdocs/

:p"p8number I FO

printfN-ecimal$ Gdbr


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strlen/ function returns lengt" of


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t"e string.

S#l"tt"ng t-e 'tr"ng "nt !n !rr!( 8 e9#le4'e#er!tr,'tr"ng5:

;"n"ng t-e !rr!( ele%ent' "nt ! '"ngle 'tr"ng l db.

%t is available wit" xampp download. T"e url address to open p"pmyadmin is

"ttp$local"ostp"pmyadmin.

"n'ert we can insert records in a table

r6'e we can browse t"e table records'tr$*t$re to c"ange t"e structure of a table

'0l we can execute our s>l statements

e9#rt we can export database tables into

text Bles,pdf,excell,etc.

"%#rt we can import t"e exported Ble

e%#t( we can delete t"e table records

r# we can delete t"e table structure

+y s>l interaction wit" p"p
http://localhost/phpmyadminhttp://localhost/phpmyadmin


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p"pZmys>l.dll provides more functions to connect wit" mys>ldatabase.

%('0l2*nne*t+

Sy using t"is we can create a connection between p"p and mys>l database.itcontains F arguments$

servername

Dsername

password

%('0l2'ele*t2+to select database from mys>l server,arguments are s>l statementand connection id.

%('0l20$er(+

Toexecute s>l >uery in mys>l database. arguments are s>l

statement and connection id. %('0l2errr+

To get t"e error messages w"ile executing mys>l statements.

%('0l2errn+

To get t"e error number w"ile executing mys>l statements.

To create connection between mys>land p"p


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and p"p

:p"pif8conImys>lZconnectJlocal"ostK, JrootK, J K//

ec"o JconnectedK. JbrlZerror/O:lZ>uery[create database ven'at[,8con//

ec"o [database created[O

else

ec"o mys>lZerror/O

:lZselectZdbJdbZnewK,8con/O

ifmys>lZ>uery[create table customersno int/[,

8con//ec"o Jtable created[O

else

ec"o mys>lZerror/O

:l."tml

insert.p"p

!oo'ies and sessions


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) coo'ie is often used to identify auser.

) coo'ie is a small Ble t"at t"e

server embeds on t"e userNscomputer.

4ac" time t"e same computer

re>uests a page wit" a browser, itwill send t"e coo'ie too.

=it" PHP, you can bot" create and

retrieve coo'ie values

T"e )natomy of a !oo'ie


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!oo'ies are usually set in an HTTP

"eaderHTTP1.1 E** C-ate$ #ri, * #eb E*** E1$*F$FW +T(erver$ )pac"e1.F.9 DY%A/ PHP.*bF (et!oo'ie$ nameIxy3O expiresI#riday, *?#eb?* EE$*F$FW+TOpat"IOdomainItutorialspoint.com!onnection$ close!ontent?Type$ text"tml

(etting !oo'ies wit" PHP


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PHP provided 'et*1"e45function to set

a coo'ie. T"is function re>uires upto six arguments

and s"ould be called before "tml< tag.

#or eac" coo'ie t"is function "as to becalled separately.

E9#lr"ng *1"e !ttr"$te'+N!%e 3!l$e


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P!t- identiBes sites wit"in variouspat"s in t"e same domain. (etting

t"is to t"e root J/K

allows entire domain to accessinformation stored in t"e coo'ie.

Se*$r"t( T"is can be set to 1 tospecify t"at t"e coo'ie s"ould onlybe sent by secure transmission using

HTTP( ot"erwise set to * w"ic" meancoo'ie can be sent by regular HTTP.

#ollowing example will create twocoo'ies n!%eand !get"ese coo'ies will be

i d ft "


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expired after one "our

:p"psetcoo'ie[name[, [@o"n =at'in[, time/FX**, [[,[[, */O

setcoo'ie[age[, [FX[, time/FX**, [[, [[, */O

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