How can I iterate through two arrays at the same time without re-iterating through the parent loop? [duplicate]

Answer 1

Not the most efficient, but a demonstration of SPL's multipleIterator

$mi = new MultipleIterator();
$mi->attachIterator(new ArrayIterator($a));
$mi->attachIterator(new ArrayIterator($b));

$newArray = array();
foreach ( $mi as $value ) {
    list($value1, $value2) = $value;
    echo $value1 , '-' , $value2 , PHP_EOL;
}

Answer 2

Use a normal for loop instead of a foreach, so that you get an explicit loop counter:

for($i=0; $i<count($content)-1; $i++) {
  echo $content[$i].'-'.$contentb[$i];
}

If you want to use string based indexed arrays, and know that the string indexes are equal between arrays, you can stick with the foreach construct

foreach($content as $key=>$item) {
  echo $item.'-'.$contentb[$key];
}

Answer 3

If they're the same size, just do this:

foreach($a as $key => $content){
   $contentb = $b[$key];
   echo($content."-".$contentb."<br />");
}