foreach循环中的Foreach循环？

Question

I have a list of names and each name consist of 2-4 words: name, (if exist) middle name(s), surname.

These are the names:

• Ali Yilmaz
• Taha Ugur Unal
• Omer Ibrahim Tahsin Son
• Recai Sahin

etc.

I want to print this names as this: Surname, name middle name(s) (if exist)

The names above will be:

• Ali Yilmaz -> Yilmaz, Ali
• Taha Ugur Unal -> Unal, Taha Ugur
• Omer Ibrahim Tahsin Son -> Son, Omer Ibrahim Tahsin
• Recai Sahin -> Sahin, Recai

etc.

If I had only one name I can use that code:

    <?php $exp1 = explode(" ", $author1); ?>        
    <?php if (count($exp1) == 2) {?>
    <?php print ($exp1[1] .', ' .$exp1[0]); ?>

    <?php } elseif (count($exp1) == 3) {?>
    <?php print ($exp1[2] .', ' .$exp1[0] .' ' .$exp1[1]); ?>

    <?php } elseif (count($exp1) == 4) {?>
    <?php print ($exp1[3] .', ' .$exp1[0] .' ' .$exp1[1] .' ' .$exp1[2]); ?>        

    <?php }?>

Each page can have different numbers of author and I thought I could use foreach to apply the above code for each author name but I couldn't do this.

I tried a piece of code such that:

        <?php foreach $author as $obj): ?>
            <?php $a = explode (" ", $obj) ?> 
        <?php endforeach ?>
        ...

But it gives error:

explode() expects parameter 2 to be string, array given.

How can I do this?

Answer 1

<?php
$names = array(
  'Ali Yilmaz',
  'Taha Ugur Unal',
  'Omer Ibrahim Tahsin Son',
  'Recai Sahin'

);

// First you should iterate through:
foreach ($names as $name) {
  // and now, let make the job
  // split by words
  $parts = explode(' ', $name);
  if (count($parts) == 1) {
    echo "{$name}<br/>";
    continue;
  }
  // get last word
  $last = array_pop($parts);
  // Print last one, comma, and rest of name
  echo "{$last}, " . implode(' ', $parts) . "<br/>";
}