Nested foreach()

Question

I have the following array:

Array ( 
  [1] => Array ( 
    [spubid] => A00319 
    [sentered_by] => pubs_batchadd.php
    [sarticle] => Lateral m         


        

Answer 1

Just for fun. If you really want to avoid loops, try this:

// Pre PHP 5.3:

function cb2($e)
{
    return $e['slast'] . ', ' . $e['sfirst'];
}

function cb1($e)
{
    $authors = array_map('cb2', $e['authors']);
    echo implode('; ', $authors) . ":<br />\n" . $e['sarticle'] . "<br />\n";
}

array_walk($data, 'cb1');



// PHP 5.3 (untested):

array_walk($data, function($e)
{
    $authors = array_map(function($e)
    {
        return $e['slast'] . ', ' . $e['sfirst'];
    },
    $e['authors']);

    echo implode('; ', $authors) . ":<br />\n" . $e['sarticle'] . "<br />\n";
});

Answer 2

Take a look at this

Answer 3

If your problem is that you have the same author on multiple articles and thus getting output more than once, the simplest solution is to build an array of authors instead of outputting them right away.

When you have an array of all the authors you've processed so far you can easily compare if this author is already in there or not.

Answer 4

Why don't you do

foreach($apubs as $apub) {
  $sauthors = '';
  $stitle = $apub['sarticle'];
  foreach($apub['authors'] as $author) {
    $sauthors .= $author['slast'].", ".$author['sfirst']."; ";
  }

  echo "$sauthors<br />\n$stitle<br />\n";
}