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@NogDogDec 22.2014 — #Might be informative to do this, so we know what's actually being worked with:
@NogDogDec 22.2014 — #Ah, so you're attempting to get the min()/max() on an array of objects, not an array of numeric values. Therefore, you'd need to loop through that array to extract the 'num' value from each into a separate 1-D array, which you could then run through min() or max(). Not 100% sure what the syntax would be, but something like this (maybe?):
Sorry I can't be more exact, as I avoid XML whenever possible. ?
(min(), max()) + xpath() = nonsense
Okay, I am using an XML “database” with my PHP (due to having mirror sites), and my xpath() function is not playing nice with min() and max(). The relevant XML is:
[code=html]
<novel>
<chapters>
<chap num=”1″ />
<chap num=”2″ />
<chap num=”3″ />
<chap num=”4″ />
<chap num=”5″ />
<chap num=”6″ />
<chap num=”7″ />
<chap num=”8″ />
<chap num=”9″ />
</chapters>
</novel>
The PHP in question is:
[code=php]$chapnums = $novel->xpath(‘./child::chapters/child::chap/attribute::num’);
$first=min($chapnums);
$last=max($chapnums);
For some reason, I’m getting the last node with min() and the first node with max() (I’ve discovered this via rearranging the elements), but as it stands, $first ends up being “9” and $last is “1”, the opposite of what I want.
What’s going on?
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@NogDogDec 22.2014 — #Might be informative to do this, so we know what's actually being worked with:[code=php]
$chapnums = $novel->xpath('./child::chapters/child::chap/attribute::num');
echo "<pre>".var_export($chapnums, 1)."</pre>";
[/code]0
@NogDogDec 22.2014 — #Ah, so you're attempting to get the min()/max() on an array of objects, not an array of numeric values. Therefore, you'd need to loop through that array to extract the 'num' value from each into a separate 1-D array, which you could then run through min() or max(). Not 100% sure what the syntax would be, but something like this (maybe?):[code=php]
$chapNumsOnly = array();
foreach($chapnums as $obj) {
// not sure which (if either of these is right:
$chapNumsOnly[] = $obj['num'];
// or...
$chapNumsOnly[] = $obj->num;
}
$max = max($chapNumsOnly);
[/code]Sorry I can't be more exact, as I avoid XML whenever possible. ?