PHPMySQL_CH02.ppt

7/25/2019 PHPMySQL_CH02.ppt

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LEARN THE QUICK AND EASY WAY!

VISUAL QUICKPROGUIDE

PHP and MySQL for

Dynamic Web Sites 4th Edition

Instructors NotesChapter 2: Programming with PHP

Copyright 2012 by Larry Uman


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Leanin O"t#o$e%

! I"enti#y how $ey pieces o# an H%&L #orm reate to PHP

! Choose the proper H%&L #orm metho"

! Han"e H%&L #orm "ata in a PHP script! Use common con"itionas

! 'ecogni(e an" use the stan"ar" operators

! )ai"ate #orm "ata in se*era ways


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Leanin O"t#o$e%

! I"enti#y what arrays are

! 'ecogni(e the supergoba arrays

! Create arrays using "i##erent approaches! +ccess e*ery eement in an array

! ,ort arrays

! Con*ert between arrays an" strings

! Use oops


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An HT&L 'o$

Name:

Email !!ress:

#en!er: %ale &emale

ge:

omments:


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Choo%in a &ethod

GET

! %he stan"ar" metho" #ora ser*er re-uests

! .ata appen"e" to theU'L

! Can be boo$mar$e"

! User can cic$ /ac$

! Use" #or re-uestingin#ormation

POST

! .ata is not *isibe in theU'L

! &uch arger imit on theamount o# "ata that canbe submitte"

! Can sen" #ies

! Users see warnings i#they cic$ /ac$

! Use" #or re-uesting action


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Hand(in a 'o$

! Use '3U,%45name56

! 7r use 8%45name56 an" P7,%45name569"epen"ing upon the #orms metho" *aue

! +ways oa" the #orm through a U'L


7/21LEARN THE QUICK AND EASY WAY!


Hand(in a 'o$




Co$$on Po)(e$%

! ;aiure to oa" the #orm through a U'L

! Incorrect re#erence to the PHP script

! Case?sensiti*ity issue with PHP *ariabes

! Incorrect eement names in the H%&L #orm




Conditiona(%

i# @

AA .o this

Bi# @

AA .o this

B ese @

AA .o thatB

i# @

AA .o this

B esei# @AA .o that

B ese @

AA .o whate*er

B




What i% t"e*

! *ar9 i# *ar has a *aue other than 09 an emptystring9 ;+L,9 or NULL

! isset9 i# *ar has any *aue other than NULL9incu"ing 09 ;+L,9 or an empty string

! %'U9 true9 %rue9 etc=




O+eato%Symbol Meaning Type

is e-ua to comparison

is not e-ua to comparison

D ess than comparison

E greater than comparison

D ess than or e-ua to comparison

E greater than or e-ua to comparison

not ogica

FF an" ogica+N. an" ogica

GG or ogica

7' or ogica

7' an" not ogica




Va(idatin 'o$ Data

! Ne*er trust eterna "ata

! Use isset to con#irm *ariabe has a *aue

! Use empty to con#irm *ariabe has a non?empty*aue

! Chec$ the "atas type9 when appropriate9 #oreampe9 using isnumeric

! Chec$ the "atas *aue9 when appropriate=


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A##e%%in Aa,%

// *se array notation to a''ess in!i$i!ual elements:

7ban! = 7artists;0

e'ho 7states;%

// Fou 'anGt !o this:

e'ho "%y list of states: 7states"

// r this:

e'ho "H is 7states;H5" // ,I




S"+e(o)a( Aa,%

! 8%

! P7,%

! '3U,%! ,')'

! N)

! ,,,I7N

! C77JI




Ceatin Aa,%

7ban!; = Jemaine

7ban!; = ,ret

7ban!; = %urray

7ban!;fan = %el7ban!;fan = a$e // Ne- $alue

7fruit;2 = apple

7fruit;2 = orange // Ne- $alue

7states = array K

=> o-aA

% => %arylan!L

7artists = array Klem 1ni!eA 1hinsA EelsL




Loo+in Tho"h Aa,%

forea'h K7array as 7$alueL M

// o something -ith 7$alue5

// r:

forea'h K7array as 7@ey => 7$alueL M

e'ho "he $alue at 7@ey is 7$alue5"




Sotin Aa,%

! sort9 by *aue9 "ropping the $eys

! asort9 by *aue9 maintaining the $eys

! $sort9 by $ey9 maintaining the *aues! rsort9 sort in re*erse or"er

! arsort9 asort in re*erse or"er

! $rsort9 $sort in re*erse or"er

VISUAL QUICKPRO GUIDE




Aa,% and Stin%

7array = explo!e KseparatorA 7stringL

7string = implo!e KglueA 7arrayL

7sO = %on(ue(Be!(hu(&ri7!ays6array = explo!e K(A 7sOL

// 7!ays6array no- a fi$e(element arrayA -ith %on in!exe! at 05

7s2 = implo!e KA A 7!ays6arrayL

// 7s2 no- a 'omma(separate! list of !ays: %onA ueA Be!A huA &ri5





Whi(e Loo+%

-hile KconditionL M

// o something5





'o Loo+%

for Kinitial expression condition closing expressionL M

// o something5

for K7i = O 7i

PHPMySQL_CH02.ppt

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