I could have used a swich for this, but I found that using the array was much faster. Regarding [php_net at mcdragonsoftware dot com 17-Jun-2011 09:53]; the elegant function and syntax provided for an "inline switch" statement is more readable and about 25% faster than this alternative (that uses existing builtin functions), which produces the same result: Use the switch statement to select one of many blocks of code to be executed.. Syntax XML Tutorials. Beachten Sie, dass im Unterschied zu einigen anderen Sprachen die Declaring a variable (actually an array) as static w/in a switch{} spun my wool for a while: In reply to earlier comment, "switch"- I found this to be one of the best ways to interpret 'actions'. Die alternative Syntax für Kontrollstrukturen wird für switch Anweisungen Es kommt oft vor, dass man dieselbe Variable (oder denselben Ausdruck) gegen viele verschiedene mögliche Werte prüfen und abhängig davon unterschiedlichen Code ausführen möchte. Just remember to include another break statement as a failsafe. Examples might be simplified to improve reading and basic understanding. We use the inversion trick (mentioned by many posters) to make it perform a strict one: As the doc states, switch uses loose comparison by default. Learn Python Learn Java Learn C++ Learn C# Learn Machine Learning.
Web Templates Web Statistics Web Certificates Web Editor Web Development Test Your Typing Speed. The example below displays a simple HTML form with two input fields and a submit button:When the user fills out the form above and clicks the submit button, the form data is sent for processing to a PHP file named \"welcome.php\". Die Anweisungsliste eines case kann ebenso leer sein, was einfach die Something not mentioned in the documentation itself, and only touched on momentarily in these notes, is that the default: case need not be the last clause in the switch.
Es ist möglich ein Semikolon anstelle eines Doppelpunkts nach einem case zu Not sure if this has been posted or not, but I found the switch statement useful for finding ranges of data. working a bit around with it I found out that it is not possible to "loose comparison" means that switch won't check the type. Explicitly cast your variables where possible to avoid mismatch: unterstützt. Haven't seen it mentioned here, but at least in my version (PHP 5.2.5) and I'm sure all of PHP 5, the switch statement is a great way to check type safe enumerates that are otherwise missing in the PHP language. If the variable supplied to switch() is an integer, the cases would be converted to integer before the comparison is made (usually to zero). I think this fact needs a little bit more attention, so here's an example:"You bought a rusty iron medal from a shady guy who insists it's a Nobel Prize..." If omitted, the current date and time will be used (as in the examples above). It's easy to abuse the switch syntax to do some very useful things. This will stop the execution of more code and case testing inside the block. In answer to njones at fredesign dot com, what you're seeing is the way the switch statement is supposed to work.
This is a highly stripped version of the class.//Add code here to secure attacks through $_GET or use $_POST In this contrived example, I get out of the first case of the switch statement once a condition is met. Be careful if you have mixed types of values in the switch statement. Something fairly simple (and maybe obvious) that I didn't see mentioned is that the default case WILL be executed even if the switched variable does not exist or is undefined. As this example will show, the possibilities can go beyond even Duff's Device-style craziness (not that this example is nearly as clever as Duff's Device, but it demonstrates how you can do certain things other than simply the increment/decrement/assignment that's possible in C)./* Note the isolation of break; statements and the fact that default: is at the top *//* Flavors available: chocolate, strawberry, vanilla *//* Flavors available: chocolate, strawberry, vanilla */ In case : ) it helps someone, I was able to clean up some hairball code by using nested switches (didn't see it mentioned here). The PHP mktime() function returns the Unix timestamp for a date. They do. The Unix timestamp contains the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified. Be careful if distinguishing between NULL and (int)0. Example: Thanks to all those who are writing examples - I love this site! Learn how to create a "toggle switch" (on/off button) with CSS.If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: The PHP switch Statement. W3Schools is optimized for learning, testing, and training. The difference between a series of if statements and the switch statement is that the expression you're comparing with, is evaluated only once in a switch statement. Programming. Learn SQL Learn PHP Learn ASP Learn Node.js Learn Raspberry Pi. … If no matching cases are found, the program continues to the default label. Just a word of warning about using switch don't try and compare variables that contain numbers with strings like so: If no default label is found, the program continues to the statement(s) after the switch. In response to the entry by "kriek at jonkriek dot com", I think you would probably be better of doing this:// ensure $_GET['go'] is set, an integer, and not 0 When a match is found, and the job is done, it's time for a break. Be very careful when you're using text strings as cases. Kontrolle an die Anweisungsliste des nächsten case übergibt. Eines benutzt eine The following snippet prints "hello". Remember, that you also could use functions in a switch. There is no need for more testing. Please note that PHP won't throw any error/warning if your `switch` utilizes more than one `default` - in such case it will just jump to the first one.