php combine arrays ignoring empty values

Question

I am stuck. I have 2 arrays that I want to combine, ignoring the empty values, and return a string. Such as:

$Array1 ( [0] => [1] => Monday [2] => Wednesday [3] => Friday [4] => Sunday ) 
$Array2 ( [0] => [1] => 8am [2] => [3] => 10am [4] => [5] => 2pm [6] => [7] => 4pm )

to return:

Monday 8am, Wednesday 10am, Friday 2pm, Sunday 4pm

Thanks in advance...

tried array_keys / array_values function to get rid of empty parts? — Hajo
– Hajo, Commented Apr 18, 2012 at 17:45

rid · Accepted Answer · 2012-04-18 17:42:54Z

2

$periods = array();
foreach (array_combine(array_filter($Array1), array_filter($Array2)) as $day => $hour) {
  $periods[] = $day . ' ' . $hour;
}
echo implode(', ', $periods);

answered Apr 18, 2012 at 17:42

rid

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Cal · Accepted Answer · 2012-04-18 17:49:06Z

2

It's not entirely clear what format you want the output in, but using array_filter() is the first step:

$a1 = array( null, 'Monday', 'Wednesday', 'Friday', 'Sunday' );
$a2 = array( null, '8am', null, '10am', null, '2pm', null, '4pm' );

$a1 = array_filter($a1);
$a2 = array_filter($a2);

This removes the null entires. You can then use foreach to build your output. For an array of arrays:

$out = array();
foreach ($a1 as $e) $out[] = array($e, array_shift($a2));

For an array of strings:

$out = array();
foreach ($a1 as $e) $out[] = $e.' '.array_shift($a2);

Demo showing both output types: http://codepad.org/ITZJH4RL

answered Apr 18, 2012 at 17:49

Cal

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1 Comment

tim Over a year ago

array_filter() to remove the null entries was exactly what I was looking for. The rest of my code worked just fine. Thanks!

Matt Moore · Accepted Answer · 2012-04-18 19:12:39Z

1

Kind of a dirty way to do it but..

//Your arrays:
$Array1 = array( null , Monday, Wednesday, Friday, Sunday) 
$Array2 = array(null, 8am, null, 10am,null, 2pm, null, 4pm)
$Array3 =();
foreach($Array2 as $key=>$val):
    if($val != ''):
        array_push($Array3, $val);
    endif;
endforeach;

// This assumes you have the same number of values in each array
foreach( $Array1 as $key=>$val):
   $Array1[$key] = $Array1[$key] . " " . $Array3[$key];
endforeach;

var_dump($Array1);

Give it a shot and let me know if you get any errors.

Edit: Turned example arrays into actual arrays instead of just listing them out from the example.

edited Apr 18, 2012 at 19:12

answered Apr 18, 2012 at 17:50

Matt Moore

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1 Comment

Matt Moore Over a year ago

Yea, I know, I was just pulling in his arrays from his example.

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