Website Development

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Website Development Management
CIT 3353 -- Fall 2006 www.clt.astate.edu/jseydel/m
is3353

• More PHP Odds Ends

Instructor John Seydel, Ph.D.
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Student Objectives

• Upon completion of this class meeting, you
  should be able to
• Create an onLoad event handler for a web page
• Use the foreach() construct to loop through an
  array of data
• Use ereg() to validate email addresses
• Use switch() in place of the if()/elseif()
  construct
• Discuss how data are stored and processed using
  arrays

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Some Other Things (continued)

• Note some things in the FKAuto calculator page
  (calc.php)
• JavaScript
• Arrays
• foreach() construct
• Review and enhancement of email handling
• Replace if() construct with switch() construct
• Check for a valid email address
• Use ereg()
• Case-sensitive use eregi() for case-insensitive
• Alternative to preg_match(), which is a
  Perl-compatible function
• Search for an at symbol (_at_)
• Syntax ereg(_at_,strTo)
• Add onLoad event handler to ltbodygt
• Review and revision of the script writing process

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What Weve Looked at Today

• Using JavaScript to create an onLoad event
  handler
• How for() and foreach() constructs work
• The ereg() function
• Comparison of switch() and if()/elseif()
• Array concepts

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Appendix
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Arrays

• Creating a simple array
• arrTerm array(2,3,4,5,6,7)
• or
• arrTerm range(2,7)
• This is an indexed array
• For element arrTerm0
• Index is 0
• Value is 2
• For element arrTerm5
• Index is 5
• Value is 7
• To add an element
• arrTerm6 8
• or
• array_push(arrTerm,8)
• The number of array elements is count(arrTerm)

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Associative Arrays

• Creating an associative array
• arrCustomerPerson Jenny
• arrCustomerPhone 867-5309
• or
• arrCustomer array(PersongtJenny,Phonegt8
  67-5309)
• Array contents
• For element arrCustomerPerson
• Name is Person
• Value is Jenny
• For element arrCustomerPhone
• Name is Phone
• Value is 867-5307
• Some typical associative arrays
• Form data, e.g., _POSTtxtCustomer and other
  elements
• Database recordset rows e.g., strResultModel
  and other

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Review Sending eMail

• Makes use of the mail() function
• String Arguments accepted
• Recipient
• Subject
• Message
• Header
• From (overrides value specified in php.ini)
• Reply-to
• Other . . .
• Consider a one-line example (poor coding)

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Process Guidelines for Writing Scripts Original
Recommendation

• Start by initializing
• Assign initial values to variables
• Define constants if any
• Get data
• From form
• From other sources
• Prepare data for processing
• Write the processing logic
• Branching as appropriate
• Calculations as appropriate
• String manipulations as appropriate
• Other processing (e.g., send mail, write to
  database, . . . )
• Format results for output as appropriate

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Revised Script Writing Process

• Prior to the XML/HTML
• Initialization
• Get data
• From forms and other sources (but not databases)
• Validate as appropriate
• After lthtml . . . gt and before ltheadgt
• Prepare data for processing
• Get data from database
• Write the processing logic
• Branching, calculations, and string manipulations
  as appropriate
• Other processing (e.g., send mail, write to
  database, . . . )
• Other database queries
• Format results for output as appropriate
• Within ltheadgt and ltbodygt, limit PHP to scriptlets
  that display pre-generated HTML output blocks