Tutorial: Install Apache With IIS
Tutorial : Install PHP-IIS-Apache
2] PHP pages have the extension .php
3] As a middleware scripting language, PHP co-exists with HTML scripting; it was designed for Web Programmers.
4] PHP has built-in support for a large collection of databases.
5] PHP is much faster than Perl and CGI alternatives.
6] PHP is open source. It is well maintained and portable.
1] The files for this lab shall be placed in directory C:\Inetpub\wwwroot\PHP (See Below!)
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2] Short Tags <? ....................................... ?. [Don't recommend since used for XML processing instructions!]
3] <SCRIPT LANGUAGE = "php". ........ <SCRIPT>
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2] Both the Echo and the Print commands can be used to create dynamic HTML code. (See Below!)
3] PHP Commands end with a semi-colon.
4] Double Quotes bound the string.
5] HTML Code scripting my be included within the string.
6] The PHP commands
are not case sensitive.
<?PHP
Echo "<CENTER><H1>Hello.PHP Application</H1>";
print "<H2>Written By</H2>";
Print ("<H3>Dr. Thomas E. Hicks</H3>");
?>
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7] Just like ASP code, the server strips all of the middleware scripting from the page and returns traditional HTML code. The screen capture below shows the source code from the web rendered by the server at the start of this section. (See Below!)
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8] Things output by the Print() function generally wind up in the browser window! Although data is generally placed to the function within the parentheses, it will work on some servers without them.
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1] // Comment 1
2] # Comment 2
3] /* Comment 3
Comment 4
Comment 5 */
1] Variable Names are preceded by a $
2] Assignment Statement ==> $Name = "Dr. Thomas Hicks;
3] Variables may contain Numbers [0-9], Letters[A-Z, a-z], Underscore [_]
4] Standard Data Types : Integer, Double, String, Boolean, Object, and Array
5] Special Data Types: NULL [Un-Initialized Variables] & Resource [Third Party Objects Such As Databases]
6] Dynamic Data Typing
$A = 2;
$A = "tom";
$A = true;
1] Integer Dynamic data-typing
$Quantity = 5;
2] Double Dynamic data-typing
$PayPerHour = 15.75;
3] String Dynamic data-typing
$Name = "Tom";
4] Boolean Dynamic data-typing
$Valid = true;
5] Array Dynamic data-typing
$Stooges = array("Larry", "Curley", "Moe");
GetType(5) = integer GetType(15.75) = double GetType(Tom) = string GetType(1) = boolean GetType(Array) = array |
1] Function SetType is used to change/cast the datatype (See Below!)
<?PHP
$Quantity = "5";
Print ("<BR> $ Quantity = $Quantity");
Print ("<BR> GetType($ Quantity) = ");
Print (GetType($Quantity));
SetType ($Quantity, 'integer');
Print ("<BR> GetType($ Quantity) = ");
Print (GetType($Quantity));
$Quantity = $Quantity * 2;
Print ("<BR> $ Quantity = $Quantity");
?>
2] The output from the code above may be seen below:
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$ Quantity = 5
GetType($ Quantity) = string GetType($ Quantity) = integer $ Quantity = 10 |
1] + Addition ==> X$ = 2 + 3; // $X = 5
2] - Subtraction ==> X$ = 8 - 3; // $X = 5
3] * Multiplication ==> X$ = 2 * 3; // $X = 6
4] + Division ==> X$ = 15 / 3; // $X = 5
5] % Modulus ==> X$ = 11 % 3; // $X = 2
6] X$ = 2 += ==> X$ += 3; // $X = 5
7] X$ = 2 *= ==> X$ *= 3; // $X = 6
8] X$ = 2 -= ==> X$ -= 3; // $X = -1
9] X$ = 8 /= ==> X$ /= 2; // $X = 4
10] X$ = 7 %= ==> X$ %= 3; // $X = 1
2] != Non-Equivalence ==> if ($X != 5) ... true/false
3] > Greater Than ==> if ($X > 5) ... true/false
4]
< Less Than ==> if ($X < 5) ... true/false5] >= Greater Than Or Equal To ==> if ($X >= 5) ... true/false
6] <= Less Than Or Equal To ==> if ($X <= 5) ... true/false
7]
|| OR
==> if ($X || $Y) ... true/false
8]
&& AND ==> if ($X || $Y) ... true/false9] ! NOT ==> if (! $X) ... true/false
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<?PHP $FacultyNo = 1; if ($FacultyNo == 1) { Print ("<H1>Eggen</H1>"); } ?> |
<?PHP
$FacultyNo = 2;
If ($FacultyNo == 1)
Print ("<H1>Eggen</H1>");
Else
Print ("<H1>Not Eggen</H1>");
?>
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<?PHP
$FacultyNo = 1;
If ($FacultyNo == 1)
Print ("<H1>Eggen</H1>");
Else
Print ("<H1>Not Eggen</H1>");
Print ("<H1>Might Be Hicks!</H1>");
?>
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2] Since there are no braces around the two print statements in the else clause, only the first is associated with the conditional statement.
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<?PHP
$FacultyNo = 4;
if ($FacultyNo == 1)
print ("<H1>Eggen</H1>");
elseif($FacultyNo == 2)
print ("<H1>Hicks</H1>");
elseif($FacultyNo == 3)
print ("<H1>Pitts</H1>");
else
print ("<H1>UnKnown</H1>");
?>
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<?PHP
$FacultyNo = 2;
Switch ($FacultyNo)
{
Case 1:
Print ("<H1>Eggen</H1>");
Break;
Case 2:
Print ("<H1>Hicks</H1>");
Break;
Case 3:
Print ("<H1>Pitts</H1>");
Break;
Default:
Print ("<H1>UnKnown</H1>");
}
?>
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<?PHP
$Pos = 1;
While ($Pos <= 20)
{
$RandNo = rand() % 100 + 1;
Print ($RandNo);
Print ("<BR>");
$Pos = $Pos + 1;
}
?>
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2] Output shall be something similar to the following: [Specific numbers will vary unless you set the seed using srand( ). (See Below!)
<?PHP
$Pos = 1;
Do
{
$RandNo = rand() % 100 + 1;
Print ($RandNo);
Print ("<BR>");
$Pos = $Pos + 1;
}
While ($Pos <= 20)
?>
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2] Output shall be something similar to the following: [Specific numbers will vary unless you set the seed using srand( ). (See Below!)
<?PHP
For ($Pos = 1; $Pos <= 20; $Pos ++)
{
$RandNo = rand() % 100 + 1;
Print ($RandNo);
Print ("<BR>");
}
?>
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2] Output shall be something similar to the following: [Specific numbers will vary unless you set the seed using srand( ). (See Below!)
Function BigGreetings()
{
Print ("<H1><CENTER> Greetings From Trinity University </CENTER></H1>");
}
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2] The function is called with the line
BigGreetings( );
<?PHP
Function BigGreetings()
{
Print ("<H1><CENTER> Greetings From Trinity University </CENTER></H1>");
}
BigGreetings();
?>
<HR><CENTER> Separator </CENTER><HR> <?PHP BigGreetings(); ?> |
4] I recommend placing all functions at the top of the page. They may be called where needed. (See Below!)
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1] Write the PHP code for a function, called Square( ) which will display
the square of the passed numerical value centered in the biggest and boldest
font one to a line. Assume that this is the the portion of the page which
evokes/calls your Square function. Assume the following code
to evoke/call your function.
<?PHP
For ($Pos = 5; $Pos >= 1; $Pos --)
{
Square($Pos);
}
?>
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2] The function is called with the line
Square($Pos);
3] The Code For The Square function.
Function Square($No)
{
Print ("<H1><CENTER>");
Print ($No * $No);
Print ("</CENTER></H1>");
}
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4] Putting it all together: (See Below!)
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<?PHP Function Square($No) { Print ("<H1><CENTER>"); Print ($No * $No); Print ("</CENTER></H1>"); } ?> <?PHP For ($Pos = 5; $Pos >= 1; $Pos --) { Square($Pos); } ?> |
5] I recommend placing all functions at the top of the page. They may be called where needed. (See Below!)
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1] Write the PHP code for a function, called Sum ( ) which will explicitly return the sum of the two passed numerical arguments. Assume the following code to evoke/call your function.
<?PHP
For ($Pos = 1; $Pos <= 9; $Pos ++)
{
Print ("<BR> 2 + ");
Print ($Pos);
Print (" = ");
Print Sum(2, $Pos);
}
?>
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2] The function is called with
Sum(2, $Pos)
3] The Code For The Sum function.
Function Sum($No1, $No2)
{
$ReturnValue = $No1 + $No2;
return ($ReturnValue);
}
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4] Putting it all together: (See Below!) Variables declared within a
function are local/available only within that function.
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<?PHP Function Sum($No1, $No2) { $ReturnValue = $No1 + $No2; return ($ReturnValue); } ?> <?PHP For ($Pos = 1; $Pos <= 9; $Pos ++) { Print ("<BR> 2 + "); Print ($Pos); Print (" = "); Print Sum (2, $Pos); } ?> |
5] I recommend placing all functions at the top of the page. They may be called where needed. (See Below!)
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2]Variable $No1 is not local to any function. It is a Global, On Demand, Variable. Any function, that includes the global statement Global $No1; shall have access to the contents of $No1. (See Below!)
<?PHP
$No1 = 2;
Function Sum($No2)
{
Global $No1;
$ReturnValue = $No1 + $No2;
return ($ReturnValue);
}
?>
<?PHP
For ($Pos = 1; $Pos <= 9; $Pos ++)
{
Print ("<BR> ");
Print ($No1);
Print (" + ");
Print ($Pos);
Print (" = ");
Print Sum($Pos);
}
?>
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3] Although the Sum function in the previous example is much better designed, the output from the code above will look much like the output from the previous example. (See Below!)
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<?PHP
$Names = Array ("Tom", "Dick", "Harry");
For ($Pos = 0; $Pos <= 2; $Pos ++)
{
Print ($Names[$Pos]);
Print ("<BR> ");
}
Print ("<P> No Elements In Array Names = ");
Print (Count($Names));
?>
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2
] The array subscripting begins with element 0. The Count function explicitly returns the number of elements in the array.|
Tom Dick Harry No Elements In Array Names = 3 |
<?PHP
$Names[4] = "Ann";
$Names[2] = "Sally";
$Names[17] = "Judy";
ForEach ($Names As $Name)
{
Print ($Name);
Print ("<BR> ");
}
Print ("<P> No Elements In Array Names = ");
Print (Count($Names));
?>
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2
] As you can see, the array subscripts need not be sequential. When using the ForEach statement, they are rendered in exactly the same order in which they are filled.|
Ann Sally Judy No Elements In Array Names = 3 |
1] Write the Output from the following PHP code.
<?PHP
$Names[1] = "Ann";
$Names[2] = "Sally";
$Names[0] = "Judy";
For ($Pos = 0; $Pos <= 2; $Pos ++)
{
Print ($Names[$Pos]);
Print ("<BR> ");
}
Print ("<P> No Elements In Array Names = ");
Print (Count($Names));
?>
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2
] When consecutive subscripts are used, the for loop will output data in sequential order.|
Judy Ann Sally No Elements In Array Names = 3 |
<?PHP
$Names[0] = "Tom";
$Names[1] = "Hicks";
$Names[2] = "999-7483";
$Names[3] = "Male";
$Names[4] = 50;
$Names[5] = true;
For ($Pos = 0; $Pos <= 5; $Pos ++)
{
Print ($Names[$Pos]);
Print ("<BR> ");
}
Print ("<BR> No Elements In Array Names = ");
Print (Count($Names));
?>
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2
] Just as normal variables utilize dynamic data-typing, each element in the array also can accept dynamic data-typing.|
Tom Hicks 999-7483 Male 50 1 No Elements In Array Names = 6 |
<?PHP
$Names[] = "Tom";
$Names[] = "Dick";
$Names[] = "Harry";
ForEach ($Names As $Name)
{
Print ($Name);
Print ("<BR> ");
}
Print ("<P> No Elements In Array Names = ");
Print (Count($Names));
Print ("<P> ");
$Names[] = "Jennifer";
$Names[] = "Monica";
$Names[] = "Susan";
ForEach ($Names As $Name)
{
Print ($Name);
Print ("<BR> ");
}
Print ("<P> No Elements In Array Names = ");
Print (Count($Names));
?>
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2] $Names[] = ???? appends a new value to the array!
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Tom Hicks 999-7483 Male 50 1 No Elements In Array Names = 6 |
1] Write the Output from the following PHP code.
<?PHP
$Users = Array( "First" => "Tom",
"Last" => "Hicks",
"Phone" => "999-7483",
"Dept" => "CompSci");
Print "<BR> First : ";
Print $Users["First"];
Print "<BR> Last : ";
Print $Users["Last"];
Print "<BR> Phone : ";
Print $Users["Phone"];
Print "<BR> Dept : ";
Print $Users["Dept"];
?>
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2] This sort of allows us to easily access a record within the array structure.
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First : Tom |
3] What if we had several users? See the next section!
1] Write the Output from the following PHP code.
<?PHP
$Users = Array (
Array ( "First" => "Tom",
"Last" => "Hicks",
"Phone" => "999-7483",
"Dept" => "CompSci"),
Array ( "First" => "Maurice",
"Last" => "Eggen",
"Phone" => "999-7487",
"Dept" => "CompSci"),
Array ( "First" => "Suzanne",
"Last" => "Williams",
"Phone" => "999-7543",
"Dept" => "Communications")
);
ForEach ($Users as $User)
ForEach ($User As $Key=>$Data)
Print ("$Key: $Data<BR>");
?>
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2] It is amazing what one can do with just three lines of output at the bottom.
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First: Tom |
