Remove lines with empty values from multidimensional-array in php

Question

How do you remove the lines that have empty elements from a multidimensional-array in PHP?

For instance, from:

1: a, b, c, d
2: d, _, b, a
3: a, b, _, _
         


        

Answer 1

Use this code:

$source = array(
    array('a', 'b', 'c', 'd'),
    array('d', '_', 'b', 'a'),
    array('a', 'b', '_', '_'),
    array('d', 'c', 'b', 'a'),
    array('_', 'b', 'c', 'd'),
    array('d', 'c', 'b', 'a'),
);

$sourceCount = count($source);

for($i=0; $i<$sourceCount; $i++)
{
  if(in_array("_", $source[$i])) unset($source[$i]);
}

See: http://ideone.com/Vfd6Z

Answer 2

$arr = array(... your multi dimension array here ...);
foreach($arr as $idx => $row) {
    if (preg_grep('/^$/', $row)) {
        unset($arr[$idx]);
    }
}

Answer 3

Loop through the multidimensional array and check to see if the array at position i contains any empty elements. If it does, call unset($arr[i]) to remove it.

for($i=0,$size=sizeof($arr); $i < $size; $i++) {
    if( in_array( "", $arr[$i] ) )
        unset( $arr[$i] );
}

Answer 4

Try this:

Note: $arr is your array.

foreach ( $arr as $key => $line ) {

    foreach ( $line as $item ) {

        if ( empty( $item ) ) {

            unset( $arr[$key] );
            break;
        }

    }

}

Cheers

Answer 5

I would iterate through a foreach loop myself something like:

<?php
    // Let's call our multidimensional array $md_array for this

    foreach ($md_array as $key => $array)
    {
        $empty_flag = false;

        foreach ($array as $key => $val)
        {
            if ($val == '')
            {
                $empty_flag = true;
            }
        }

        if ($empty_flag == true)
        {
            unset($md_array[$key]);
        }
    }
?>

There's almost definitely a more efficient way of doing this so anyone else who has a better solution feel free to let me and Alex know.