[SOLVED] Finding Highest ID in an Array

[JSHINER]

I have an array that is displayed using:

 

foreach($page['array'] as $c) {

echo 'some stuff';

}

 

Each has an id .. $c['id'] ... how can I find the highest ID in that array and on that echo have an if statement... so for example the highest ID would read "some stuff HIGHEST".

[.josh]

max()

[JSHINER]

I tried that it didn't work.

[Mchl]

$maxId = 0;
foreach($page['array'] as $c) {

$maxId = max($maxId,$c['id'])

}
foreach($page['array'] as $c) {

echo 'some stuff';
if ($c['id'] == $maxId) {
  echo "Highest ID";
}

}

 

I don't like it, as it's looping the array twice, but can't think of anything else right now.

 

Perhaps array_walk_recursive()  ??

[Adam]

Could try something like:

 

$highestID = 0;

foreach($page['array'] as $c) {
   if ($c['id'] > $highestID) $highestID = $c['id'];
}

foreach($page['array'] as $c) {
   if ($c['id'] == $highestID) {
       echo 'some stuff';
   } else {
       echo 'some other stuff';
   }
}

 

It's not that efficient as it needs two loops, I dare say there's another way but.. I dont know it...

 

Adam

[Ken2k7]

What about:

$maxId = 0;
$results = array();
foreach($page['array'] as $c) {
     $id = $c['id'];
     if ($maxId < $id) {
          $maxId = $id;
          $results = array();
     }
     if ($maxId == $id) $results[] = $c;
}

echo "Highest id is: " . $maxId;

 

The $results array would have all the results that has the highest ID in case you wanted those too. You can definitely loop through the $results array as well.

[.josh]

foreach($page['array'] as $c) {
   $ids[] = $c['id'];
}
echo max($ids);

 

[tibberous]

function crap($a, $b){

return $a['id'] > $b['id'];

}

 

usort($page['array'], 'crap');

 

That work?

[JSHINER]

thanks guys! Figured it out.