Break current script, but run next

[Sandman]

Ok, so I have PHP set upp to ato_prepend and auto_append files to every script
I run. So if I someone surfs to /index.php, these scripts run:

init.php -> set up DB connections and stuff. Buffers output
index.php -> The current page with it's layout, output is buffered.
postprocess.php -> Fetches buffer, applies layout to page.
Now, sometimes I want to break the execution of index.php (or whatever page
that is in the middle). For example, when someone submits a form with
insufficient data, I want to quit executing code and just put up an alert. But
if I use "die;", then PHP will stop executing all code, it won't just stop
executing the code in index.php.

Is there a way to tell PHP to stop executing code in the current script, but
continue with the next? I would guess that the same could apply to include()'d
files, where I want the execution of the included file to stop, but the page
that included the file shouldn't stop executing. I.e.:

<?
print "Hello ";
include("world.php");
print "!";
?>

And "world.php" would in this case just output "World", but by using some
method, I could just break the execution of world.php from within world.php
(without using large IF blocks) and the result would then be "Hello !" from the
page, and not "Hello " which happens if I use "die;" in world.php.

Any suggestions?

--
Sandman[.net]

[Pieter Nobes]

Sandman wrote:

Any suggestions?

Perhaps you could use something like:

<?php
while (true) {
// ...
if ( NOT_ALL_FIELS_CORRECT ) {
$message = ERRORMSG;
break;
}
// Rest of code
break; // Don't forget this or you're thrown in an infinite loop
}
?>

--
Pieter Nobels

[Sandman]

In article <jH***********************@phobos.telenet-ops.be>,
Pieter Nobes <pi******@MOVE.opengate.be> wrote:

Sandman wrote:

Any suggestions?

Perhaps you could use something like:

<?php
while (true) {
// ...
if ( NOT_ALL_FIELS_CORRECT ) {
$message = ERRORMSG;
break;
}
// Rest of code
break; // Don't forget this or you're thrown in an infinite loop
}
?>

I don't get it. How do I apply this to my files? In which file do I add this? I
would very much prefer not to have index.php (in this case) be something like:
if (condition){
(alert of error and break script
} else {
huge block of application, several K's big that would ordinarely be executed
}

--
Sandman[.net]

[Pieter Nobes]

Sandman wrote:

In article <jH***********************@phobos.telenet-ops.be>,
Pieter Nobes <pi******@MOVE.opengate.be> wrote:

Sandman wrote:

Any suggestions?
Perhaps you could use something like:
...

I don't get it. How do I apply this to my files? In which file do I add this? I
would very much prefer not to have index.php (in this case) be something like:

You use it in all your pages. You start a while loop (just an example,
first possible way I could think of), and when something goes wrong, you
/break out/ out the wile loop, and the other script (postproccess.php)
will be executed (since that code isn't in the while loop). Process:

load page
include init.php
execute init.php
go into while loop
check wether $_GET['name'] is empty
$_GET['name'] is empty, break out of while loop

the rest of the code in the while loop isn't executed, since we

broke out
include postprocess.php
execute postprocess.php
if (condition){
(alert of error and break script
} else {
huge block of application, several K's big that would ordinarely be executed
}

Why don't you want this? You *have* to say *somewhere* what the
interpreter has to in which conditions. This seems like a very good and
fast solution (beter than the while loop ;-) )

--
Pieter Nobels

[Sandman]

In article <ES***********************@phobos.telenet-ops.be>,
Pieter Nobes <pi******@MOVE.opengate.be> wrote:

Sandman wrote:

In article <jH***********************@phobos.telenet-ops.be>,
Pieter Nobes <pi******@MOVE.opengate.be> wrote:

Sandman wrote:

Any suggestions?

Perhaps you could use something like:
...

I don't get it. How do I apply this to my files? In which file do I add
this? I
would very much prefer not to have index.php (in this case) be something
like:

You use it in all your pages. You start a while loop (just an example,
first possible way I could think of), and when something goes wrong, you
/break out/ out the wile loop, and the other script (postproccess.php)
will be executed (since that code isn't in the while loop). Process:

load page
include init.php
execute init.php
go into while loop
check wether $_GET['name'] is empty
$_GET['name'] is empty, break out of while loop

>>>> the rest of the code in the while loop isn't executed, since we

broke out
include postprocess.php
execute postprocess.php

if (condition){
(alert of error and break script
} else {
huge block of application, several K's big that would ordinarely be
executed
}

Why don't you want this? You *have* to say *somewhere* what the
interpreter has to in which conditions. This seems like a very good and
fast solution (beter than the while loop ;-) )

Ok, before I set up and start trying this, are you saying that I could initiate
the loop in init.php and end it in postprocess.php? Like this:

init.php
print "Hello";
while (true){

index.php
if (!$_GET["name"]) break
print "Index";

postprocess.php
break;
}
print "World!";
So if the IF in index.php fails, will it only print "HelloWorld!"? What if I
have a loop in index.php and want to break from that? That is, if you can even
set a loop to span several scripts...

I am using the apache option php_append_file and php_prepend_file to include
init.php and postprocess.php to all scripts.

--
Sandman[.net]

[Pieter Nobes]

Sandman wrote:

So if the IF in index.php fails, will it only print "HelloWorld!"? What if I
have a loop in index.php and want to break from that? That is, if you can even
set a loop to span several scripts...

No, that's not possible. You'd have to do it in every script. I think
this solution is better because if you'd use if/else you'd have almost
*no* space left because of indenting... i.e.:

<?php
if (empty($var1)) break;
else {
// do some things
if ($connection == false) break;
else {
// do some things
if ($numrows = 0) break;
else {
// ...
}
}
}
?>

which would, in the end, become *VERY* unclear.

--
Pieter Nobels

[Jonathan Epps]

Pieter Nobes wrote:

Sandman wrote:

Any suggestions?

Perhaps you could use something like:

<?php
while (true) {
// ...
if ( NOT_ALL_FIELS_CORRECT ) {
$message = ERRORMSG;
break;
}
// Rest of code
break; // Don't forget this or you're thrown in an infinite loop
}
?>

The manual available at php.net uses a do-while loop to do the same
thing, except that with a do-while loop, you don't have to worry about
infinite loops if you use do { // ... } while(0);

<?php
do {
// ...
if ( BOZO_CANNOT_FILL_OUT_FORMS_CORRECTLY ) {
$message = ERRORMSG;
break;
}
// ...
} while (0);
?>

Here's the part of the php.net manual I'm talking about:
http://www.php.net/manual/en/control...s.do.while.php