PHP split array based on value [duplicate]

$array = array(0, 1 ,2 ,3, 0, 4, 5);
$result = array();
$index = -1;
foreach ($array as $number) {
    if ($number == 0) {
        $index++;
    }
    $result[$index][] = $number;
}
echo print_r($result, true);

You'll end with the following.

array(
    0 => array(0, 1, 2, 3),
    1 => array(0, 4, 5)
)

$x = -1;
$newArr = array();
$array = array(0,1,2,3,0,4,5,6);

foreach ($array as $key => $value) {
  if($value == 0) 
    $x++;

  $newArr[$x][] = $value;

}

You can use PHP explode to break up into String arrays for each appearance of 0, but I see now that you have an array, not a string. As suggested above now, you can use the inverse, PHP implode.

<?php
$a=array(0, 1 ,2 ,3, 0, 4, 5);
$b =array();
$k=-1;
foreach($a as $key=>$val)
{
    if($val==0)
    {
      $k++;  
    }

    $b[$k][]=$val;
}


echo"<pre>";



print_r($b[0]);

print_r($b[1]);


foreach($b as $key=>$val)
{
    echo"<pre>";
    echo $val;
    echo"</pre>";
}
?>

First concatenate the elements, then split using 0 and then separate them again by prefixing 0 e.g. below

$concatenatedStr = implode(',', $array);
$indx = 0;
$fragments = array();
$fragementStrings= explode("0,", $concatenatedStr);
foreach($fragementStrings as $fragementString) {
  //you get your fragements here 
  $fragments[$indx++][] = explode(",", "0,".$fragementString);
}

Similar to a comment, array_keys can be used to search for all keys containing the value you search for (zero in your case).

You then can loop over these positions and slice the array (see array_slice) into the parts.

Example (Demo):

$keys  = array_keys($array, 0);
$parts = [];
$last  = 0;

foreach ($keys as $key)
{
    $last !== $key 
        && $parts[] = array_slice($array, $last, $key - $last, true);    
    $last = $key;
}

$parts[] = isset($key) ? array_slice($array, $key, null, true) : $array;

This variant even preserves original keys, exemplary $parts output:

array(2) {
  [0] => array(4) {
    [0] => int(0)
    [1] => int(1)
    [2] => int(2)
    [3] => int(3)
  }
  [1] => array(3) {
    [4] => int(0)
    [5] => int(4)
    [6] => int(5)
  }
}

Another alternative could be similar to some other answers outlined. The following variant does preserve keys, too:

$array = [0, 1 ,2 ,3, 0, 4, 5];
$parts = [];
$index = 0;

foreach ($array as $key => $number)
{
    $number == 0 and $key and $index++;
    $parts[$index][$key] = $number;
}

Output (Demo):

Array
(
    [0] => Array
        (
            [0] => 0
            [1] => 1
            [2] => 2
            [3] => 3
        )

    [1] => Array
        (
            [4] => 0
            [5] => 4
            [6] => 5
        )

)