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► KB ► To/From Guides ► PHP ► Statements

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Cross Ref > Statements

By Mike Prestwood

PHP versus Corel Paradox: A side by side comparison between PHP and Corel Paradox.

Statements

Common statements such as if statements, loops, etc.

Exception Trapping

[Other Languages]

Languages Focus

A common usage of exception handling is to obtain and use resources in a "try-it" block, deal with any exceptions in an "exceptions" block, and release the resources in some kind of "final" block which executes whether or not any exceptions are trapped.

[Not specified yet. Coming...]

Corel Paradox: try...onFail

ObjectPAL has a try...onFail statement but does not have a finally-type component. However, the code afer endTry will execute.

try

onFail

endTry

Syntax Example:

var
  i SmallInt
endVar

try
  i = 0
  i = 1/i
onFail
  msgInfo("", "You cannot divide by zero.")
endTry

Debugging ObjectPAL Code

If Statement

[Other Languages]

PHP: if..elseif..else

The PHP if statement consists of using if, elseif, and else.

Syntax Example:

$x = 8;

if ($x == 10) {
 echo "x is 10.";  
} elseif ($x < 10) {
 echo "x is less than 10.";
} else {
 echo "x must be greater than 10.";  
};

Corel Paradox: If..Else..EndIf, or switch

ObjectPAL supports a simple If...Else...EndIf statement.

Notice ObjectPAL does not support an ElseIf feature as part of an if statement. Instead use a switch statement

Syntax Example: 1 certification question.

'Does ObjectPAL evaluate the math correctly? No!

If (.1 + .1 + .1) = .3 Then
  msgInfo("", "Correct")
Else
  msgInfo("", "Not correct")
EndIf

'Switch statement example.
switch
  case x = "Nate": MsgInfo("", "Hi Nate")
  case x = "Felicia": MsgInfo("", "Hi Felly")

  otherwise: MsgInfo("", "Who are you?")

endSwitch