PHP Try-catch Statement usage tips, try-catch tips _php Tutorials

PHP Try-catch Statement Usage tips, Try-catch use tips

PHP try-catch Statements
To further handle the exception, we need to use the Try-catch statement----include a try statement and at least one catch statement. Any code that calls a method that might throw an exception should use a try statement. The catch statement is used to handle the exceptions that may be thrown. The following shows the way we handle exceptions thrown by Getcommandobject ():

<?php try {   $mgr = new Commandmanager ();   $cmd = $mgr->getcommandobject ("Realcommand");   $cmd->execute (); } catch (Exception $e) {   print $e->getmessage ();   Exit (); }?>

As you can see, by using the Throw keyword together with the Try-catch statement, we can avoid the value returned by the error flag "contaminated" class method. Because "exception" itself is a type of PHP built-in that differs from any other object, it does not create confusion.

If an exception is thrown, the script in the Try statement stops executing and then immediately turns to the script in the Execute Catch statement.

If the exception is thrown and is not captured, a fatal error is generated.

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