Untitled

php foreach loop
foreach($array1 as $key=>data1){
    $data2 = $array2[$key];
}

foreach ($array_1 as $key => $data_1) {
  $data_2 = $array_2[$key];
}

$keys = array_combine(array_keys($array_1), array_keys($array_2));

foreach ($keys as $key_1 => $key_2) {
  $data_1 = $array_1[$key_1];
  $data_2 = $array_2[$key_2];
}

$max =sizeof($array);
for($i = 0; $i < $max; $i++)

array[$i].attribute
array2[$i].attribute

$i = 0;
while($i < count($ar1) && $i < count($ar2)  ) // $i less than both length !
{
  $ar1Item = $ar1[$i];
  $ar2Item = $ar2[$i];

  $i++;
}

<?php

$cond1 = 0<count($array1);
$cond2 = 0<count($array2);

for ($i=0;$cond1 || $cond2;$i++)
{
    if ($cond1)
    {
        // work with $array1
    }
    if ($cond2)
    {
        // work with $array2
    }
    $cond1 = 0<count($array1);
    $cond2 = 0<count($array2);
}

?>