How to break a for loop from inside of a fuction - php

Question

i have the following code
function do_function($name, $value, $age){
$sql = mysql_fetch_array(mysql_query("INSERT into `table` Values('','$name','$value','$age')"));
if (!$sql) {
// basicly will return false on duplicate key
//do something to break the calling for_loop ?
//i`ve tried break(); and continue(); but this will break/skip just the
//function not the for loop
}
}
$presetnumber = 25;
for($x = 0; $x <= $presetnumber; $x++){
do_function($name[$x], $value[$x], $age[$x]);
//return something on duplicate key to break the for loop ???
}
so i wannt to be able to just skip the entire loop if there is a duplicate key not just the function?
How can i do this, i don`t seem to understand quite entirely why break(); or continue(); is not working.
Please note that this is just a sample code to give you an ideea what i am trying to achieve.

Answer 1

Just return TRUE or FALSE in your function and then you can do a simple check in your loop like this:
(Pseudo code):
function do_function($name, $value, $age) {
//your stuff
if(!$sql)
return TRUE;
return FALSE;
}
for($x = 0; $x <= $presetnumber; $x++){
if(do_function($name[$x], $value[$x], $age[$x])) //breaks the loop if you return TRUE
break;
}

Answer 2

break will not work outside of the for loop. It must be inside the loop to be activated. So you could add a function like:
for(foo; bar; baz) {
if (checkForBreak()) {break};
}
Also, if you're working in PHP then break is a statement, not a function. So it's break;, not break();.

Answer 3

I believe your SQL query is always returning TRUE. Replace this:
$sql = mysql_fetch_array(mysql_query("INSERT into `table` ... "));
With this:
$sql = mysql_query("INSERT into `table` Values('','$name','$value','$age')");
I would also suggest for you to start using mysqli rather than mysql since it is deprecated